import type { Database as BunDatabase } from "bun:sqlite";
import type { DatabaseSync } from "node:sqlite";
import type { D1Database } from "@cloudflare/workers-types";
import type { CookieOptions } from "better-call";
import type {
	Dialect,
	Kysely,
	MysqlPool,
	PostgresPool,
	SqliteDatabase,
} from "kysely";
import type { AuthMiddleware } from "../api";
import type {
	Account,
	DBFieldAttribute,
	ModelNames,
	RateLimit,
	SecondaryStorage,
	Session,
	User,
	Verification,
} from "../db";
import type { DBAdapterDebugLogOption, DBAdapterInstance } from "../db/adapter";
import type { BaseAccount } from "../db/schema/account";
import type { BaseRateLimit } from "../db/schema/rate-limit";
import type { BaseSession } from "../db/schema/session";
import type { BaseUser } from "../db/schema/user";
import type { BaseVerification } from "../db/schema/verification";
import type { Logger } from "../env";
import type { SocialProviderList, SocialProviders } from "../social-providers";
import type { AuthContext, GenericEndpointContext } from "./context";
import type { Awaitable, LiteralString, LiteralUnion } from "./helper";
import type { BetterAuthPlugin } from "./plugin";

type KyselyDatabaseType = "postgres" | "mysql" | "sqlite" | "mssql";
type Optional<T> = {
	[P in keyof T]?: T[P] | undefined;
};

export type StoreIdentifierOption =
	| "plain"
	| "hashed"
	| { hash: (identifier: string) => Promise<string> };

export type GenerateIdFn = (options: {
	model: ModelNames;
	size?: number | undefined;
}) => string | false;

/**
 * Configuration for dynamic base URL resolution.
 * Allows Better Auth to work with multiple domains (e.g., Vercel preview deployments).
 */
export type DynamicBaseURLConfig = {
	/**
	 * List of allowed hostnames. Supports wildcard patterns.
	 *
	 * The derived host from the request will be validated against this list.
	 * Uses the same wildcard matching as `trustedOrigins`.
	 *
	 * @example
	 * ```ts
	 * allowedHosts: [
	 *   "myapp.com",           // Exact match
	 *   "*.vercel.app",        // Any Vercel preview
	 *   "preview-*.myapp.com"  // Pattern match
	 * ]
	 * ```
	 */
	allowedHosts: string[];

	/**
	 * Fallback URL to use if the derived host doesn't match any allowed host.
	 * If not set, Better Auth will throw an error when the host doesn't match.
	 *
	 * @example "https://myapp.com"
	 */
	fallback?: string | undefined;

	/**
	 * Protocol to use when constructing the URL.
	 * - `"https"`: Always use HTTPS (recommended for production)
	 * - `"http"`: Always use HTTP (for local development)
	 * - `"auto"`: Derive from `x-forwarded-proto` header or default to HTTPS
	 *
	 * @default "auto"
	 */
	protocol?: "http" | "https" | "auto" | undefined;
};

/**
 * Base URL configuration.
 * Can be a static string or a dynamic config for multi-domain deployments.
 */
export type BaseURLConfig = string | DynamicBaseURLConfig;

export interface BetterAuthRateLimitStorage {
	get: (key: string) => Promise<RateLimit | null | undefined>;
	set: (
		key: string,
		value: RateLimit,
		update?: boolean | undefined,
	) => Promise<void>;
}

export type BetterAuthRateLimitRule = {
	/**
	 * Default window to use for rate limiting. The value
	 * should be in seconds.
	 *
	 * @default 10 seconds
	 */
	window: number;
	/**
	 * The default maximum number of requests allowed within the window.
	 *
	 * @default 100 requests
	 */
	max: number;
};

export type BetterAuthDBOptions<
	ModelName extends string,
	Keys extends string = string,
> = {
	/**
	 * The name of the model. Defaults to the model name.
	 */
	modelName?: ModelName | LiteralString;
	/**
	 * Map fields to database columns
	 */
	fields?: Partial<Record<Exclude<Keys, "id">, string>>;
	/**
	 * Additional fields for the model
	 */
	additionalFields?: {
		[Key in Exclude<string, Keys | "id">]: DBFieldAttribute;
	};
};

export type BetterAuthRateLimitOptions = Optional<BetterAuthRateLimitRule> &
	Omit<
		BetterAuthDBOptions<"rateLimit", keyof BaseRateLimit>,
		"additionalFields"
	> & {
		/**
		 * By default, rate limiting is only
		 * enabled on production.
		 */
		enabled?: boolean | undefined;
		/**
		 * Custom rate limit rules to apply to
		 * specific paths.
		 */
		customRules?:
			| {
					[key: string]:
						| BetterAuthRateLimitRule
						| false
						| ((
								request: Request,
								currentRule: BetterAuthRateLimitRule,
						  ) => Awaitable<false | BetterAuthRateLimitRule>);
			  }
			| undefined;
		/**
		 * Storage configuration
		 *
		 * By default, rate limiting is stored in memory. If you passed a
		 * secondary storage, rate limiting will be stored in the secondary
		 * storage.
		 *
		 * @default "memory"
		 */
		storage?: ("memory" | "database" | "secondary-storage") | undefined;
		/**
		 * custom storage configuration.
		 *
		 * NOTE: If custom storage is used storage
		 * is ignored
		 */
		customStorage?: BetterAuthRateLimitStorage;
	};

export type BetterAuthAdvancedOptions = {
	/**
	 * Ip address configuration
	 */
	ipAddress?:
		| {
				/**
				 * List of headers to use for ip address
				 *
				 * Ip address is used for rate limiting and session tracking
				 *
				 * @example ["x-client-ip", "x-forwarded-for", "cf-connecting-ip"]
				 *
				 * @default
				 * @link https://github.com/better-auth/better-auth/blob/main/packages/better-auth/src/utils/get-request-ip.ts#L8
				 */
				ipAddressHeaders?: string[];
				/**
				 * Disable ip tracking
				 *
				 * ⚠︎ This is a security risk and it may expose your application to abuse
				 */
				disableIpTracking?: boolean;
				/**
				 * IPv6 subnet prefix length for rate limiting.
				 * IPv6 addresses will be normalized to this subnet.
				 *
				 * @default 64
				 */
				ipv6Subnet?: 128 | 64 | 48 | 32;
		  }
		| undefined;
	/**
	 * Force cookies to always use the `Secure` attribute. By default,
	 * cookies are secure in production environments. Set this to `true`
	 * to enforce secure cookies in all environments.
	 *
	 * @default false
	 */
	useSecureCookies?: boolean | undefined;
	/**
	 * Disable all CSRF protection.
	 *
	 * When enabled, this disables:
	 * - Origin header validation when cookies are present
	 * - Fetch Metadata checks (Sec-Fetch-Site, Sec-Fetch-Mode, Sec-Fetch-Dest)
	 * - Cross-site navigation blocking for first-login scenarios
	 *
	 * ⚠︎ This is a security risk and it may expose your application to
	 * CSRF attacks
	 *
	 * @default false
	 */
	disableCSRFCheck?: boolean | undefined;
	/**
	 * Disable URL validation against trustedOrigins.
	 *
	 * When enabled, this disables validation of:
	 * - callbackURL
	 * - redirectTo
	 * - errorCallbackURL
	 * - newUserCallbackURL
	 *
	 * ⚠︎ This may allow open redirects and could lead to security
	 * vulnerabilities.
	 *
	 * @default false
	 */
	disableOriginCheck?: boolean | undefined;
	/**
	 * Configure cookies to be cross subdomains
	 */
	crossSubDomainCookies?:
		| {
				/**
				 * Enable cross subdomain cookies
				 */
				enabled: boolean;
				/**
				 * Additional cookies to be shared across subdomains
				 */
				additionalCookies?: string[];
				/**
				 * The domain to use for the cookies
				 *
				 * By default, the domain will be the root
				 * domain from the base URL.
				 */
				domain?: string;
		  }
		| undefined;
	/*
	 * Allows you to change default cookie names and attributes
	 *
	 * default cookie names:
	 * - "session_token"
	 * - "session_data"
	 * - "dont_remember"
	 * - "account_data"
	 *
	 * plugins can also add additional cookies
	 */
	cookies?:
		| {
				[key: string]: {
					name?: string;
					attributes?: CookieOptions;
				};
		  }
		| undefined;
	defaultCookieAttributes?: CookieOptions | undefined;
	/**
	 * Prefix for cookies. If a cookie name is provided
	 * in cookies config, this will be overridden.
	 *
	 * @default
	 * ```txt
	 * "appName" -> which defaults to "better-auth"
	 * ```
	 */
	cookiePrefix?: string | undefined;
	/**
	 * Database configuration.
	 */
	database?:
		| {
				/**
				 * The default number of records to return from the database
				 * when using the `findMany` adapter method.
				 *
				 * @default 100
				 */
				defaultFindManyLimit?: number;
				/**
				 * Custom generateId function.
				 *
				 * If not provided, random ids will be generated.
				 * If set to false, the database's auto generated id
				 * will be used.
				 *
				 * If set to "serial", the database's auto generated
				 * id will be used.
				 *
				 * If set to "uuid", we generate a random UUID for
				 * the id. If postgres, we use the `gen_random_uuid()
				 * ` function. If mysql or mssql, we use the `uuid()`
				 * function.
				 */
				generateId?: GenerateIdFn | false | "serial" | "uuid";
		  }
		| undefined;
	/**
	 * Trusted proxy headers
	 *

	 * - `x-forwarded-host`
	 * - `x-forwarded-proto`
	 *
	 * If set to `true` and no `baseURL` option is provided, we will use the headers to infer the
	 * base URL.
	 *
	 * ⚠︎ This may expose your application to security vulnerabilities if not
	 * used correctly. Please use this with caution.
	 */
	trustedProxyHeaders?: boolean | undefined;
	/**
	 * Configure background task handling for deferred operations.
	 *
	 * Background tasks allow non-critical operations (like cleanup, analytics,
	 * or timing-attack mitigation) to run after the response is sent.
	 *
	 * Use `waitUntil` from `@vercel/functions` on Vercel,
	 * or `ctx.waitUntil` on Cloudflare Workers.
	 *
	 * @example
	 * // Vercel
	 * import { waitUntil } from "@vercel/functions";
	 * advanced: { backgroundTasks: { handler: waitUntil } }
	 *
	 * @example
	 * // Cloudflare Workers (with AsyncLocalStorage)
	 * advanced: {
	 *   backgroundTasks: {
	 *     handler: (p) => execCtxStorage.getStore()?.waitUntil(p)
	 *   }
	 * }
	 */
	backgroundTasks?: {
		handler: (promise: Promise<unknown>) => void;
	};
	/**
	 * Skip trailing slashes in API routes.
	 *
	 * When enabled, requests with trailing slashes (e.g., `/api/auth/session/`)
	 * will be handled the same as requests without (e.g., `/api/auth/session`).
	 *
	 * @default false
	 */
	skipTrailingSlashes?: boolean;
};

export type BetterAuthOptions = {
	/**
	 * The name of your application. Used as a display name in contexts
	 * where your app needs to be identified — for example, as the default
	 * issuer name in authenticator apps when users set up 2FA/TOTP.
	 *
	 * Can also be set via the `APP_NAME` environment variable.
	 *
	 * @default "Better Auth"
	 */
	appName?: string | undefined;
	/**
	 * Base URL for the Better Auth. This is typically the
	 * root URL where your application server is hosted.
	 *
	 * Can be configured as:
	 * - A static string: `"https://myapp.com"`
	 * - A dynamic config with allowed hosts for multi-domain deployments
	 *
	 * If not explicitly set, the system will check environment variables:
	 * `BETTER_AUTH_URL`, `NEXT_PUBLIC_BETTER_AUTH_URL`, etc.
	 *
	 * @example
	 * ```ts
	 * // Static URL
	 * baseURL: "https://myapp.com"
	 *
	 * // Dynamic with allowed hosts (for Vercel, multi-domain, etc.)
	 * baseURL: {
	 *   allowedHosts: ["myapp.com", "*.vercel.app", "preview-*.myapp.com"],
	 *   fallback: "https://myapp.com"
	 * }
	 * ```
	 */
	baseURL?: BaseURLConfig | undefined;
	/**
	 * Base path for the Better Auth. This is typically
	 * the path where the
	 * Better Auth routes are mounted.
	 *
	 * @default "/api/auth"
	 */
	basePath?: string | undefined;
	/**
	 * The secret to use for encryption,
	 * signing and hashing.
	 *
	 * By default Better Auth will look for
	 * the following environment variables:
	 * process.env.BETTER_AUTH_SECRET,
	 * process.env.AUTH_SECRET
	 * If none of these environment
	 * variables are set,
	 * it will default to
	 * "better-auth-secret-123456789".
	 *
	 * on production if it's not set
	 * it will throw an error.
	 *
	 * you can generate a good secret
	 * using the following command:
	 * @example
	 * ```bash
	 * openssl rand -base64 32
	 * ```
	 */
	secret?: string | undefined;
	/**
	 * Versioned secrets for non-destructive secret rotation.
	 * When set, encryption uses an envelope format with key IDs.
	 * First entry is the current key used for new encryption.
	 * Remaining entries are decryption-only (previous rotations).
	 *
	 * Can also be set via BETTER_AUTH_SECRETS env var:
	 * `BETTER_AUTH_SECRETS=2:base64secret,1:base64secret`
	 *
	 * When set, `secret` is only used as legacy fallback
	 * for decrypting bare-hex payloads that predate the envelope format.
	 */
	secrets?: Array<{ version: number; value: string }> | undefined;
	/**
	 * Database configuration
	 */
	database?:
		| (
				| PostgresPool
				| MysqlPool
				| SqliteDatabase
				| Dialect
				| DBAdapterInstance
				| BunDatabase
				| DatabaseSync
				| D1Database
				| {
						dialect: Dialect;
						type: KyselyDatabaseType;
						/**
						 * casing for table names
						 *
						 * @default "camel"
						 */
						casing?: "snake" | "camel";
						/**
						 * Enable debug logs for the adapter
						 *
						 * @default false
						 */
						debugLogs?: DBAdapterDebugLogOption;
						/**
						 * Whether to execute multiple operations in a transaction.
						 * If the database doesn't support transactions,
						 * set this to `false` and operations will be executed sequentially.
						 *
						 * @default false
						 */
						transaction?: boolean;
				  }
				| {
						/**
						 * Kysely instance
						 */
						db: Kysely<any>;
						/**
						 * Database type between postgres, mysql and sqlite
						 */
						type: KyselyDatabaseType;
						/**
						 * casing for table names
						 *
						 * @default "camel"
						 */
						casing?: "snake" | "camel";
						/**
						 * Enable debug logs for the adapter
						 *
						 * @default false
						 */
						debugLogs?: DBAdapterDebugLogOption;
						/**
						 * Whether to execute multiple operations in a transaction.
						 * If the database doesn't support transactions,
						 * set this to `false` and operations will be executed sequentially.
						 *
						 * @default false
						 */
						transaction?: boolean;
				  }
		  )
		| undefined;
	/**
	 * Secondary storage configuration
	 *
	 * This is used to store session and rate limit data.
	 */
	secondaryStorage?: SecondaryStorage | undefined;
	/**
	 * Email verification configuration
	 */
	emailVerification?:
		| {
				/**
				 * Send a verification email
				 * @param data the data object
				 * @param request the request object
				 */
				sendVerificationEmail?: (
					/**
					 * @param user the user to send the
					 * verification email to
					 * @param url the URL to send the verification email to
					 * it contains the token as well
					 * @param token the token to send the verification email to
					 */
					data: {
						user: User;
						url: string;
						token: string;
					},
					/**
					 * The request object
					 */
					request?: Request,
				) => Promise<void>;
				/**
				 * Send a verification email automatically after sign up.
				 *
				 * - `true`: Always send verification email on sign up
				 * - `false`: Never send verification email on sign up
				 * - `undefined`: Follows `requireEmailVerification` behavior
				 *
				 * @default undefined
				 */
				sendOnSignUp?: boolean;
				/**
				 * Send a verification email automatically
				 * on sign in when the user's email is not verified
				 *
				 * @default false
				 */
				sendOnSignIn?: boolean;
				/**
				 * Auto signin the user after they verify their email
				 */
				autoSignInAfterVerification?: boolean;
				/**
				 * Number of seconds the verification token is
				 * valid for.
				 * @default 3600 seconds (1 hour)
				 */
				expiresIn?: number;
				/**
				 * A function that is called before a user verifies their email
				 * @param user the user that verified their email
				 * @param request the request object
				 */
				beforeEmailVerification?: (
					user: User,
					request?: Request,
				) => Promise<void>;
				/**
				 * A function that is called when a user's email is updated to verified
				 * @param user the user that verified their email
				 * @param request the request object
				 */
				afterEmailVerification?: (
					user: User,
					request?: Request,
				) => Promise<void>;
		  }
		| undefined;
	/**
	 * Email and password authentication
	 */
	emailAndPassword?:
		| {
				/**
				 * Enable email and password authentication
				 *
				 * @default false
				 */
				enabled: boolean;
				/**
				 * Disable email and password sign up
				 *
				 * @default false
				 */
				disableSignUp?: boolean;
				/**
				 * Require email verification before a session
				 * can be created for the user.
				 *
				 * if the user is not verified, the user will not be able to sign in
				 * and on sign in attempts, the user will be prompted to verify their email.
				 */
				requireEmailVerification?: boolean;
				/**
				 * The maximum length of the password.
				 *
				 * @default 128
				 */
				maxPasswordLength?: number;
				/**
				 * The minimum length of the password.
				 *
				 * @default 8
				 */
				minPasswordLength?: number;
				/**
				 * send reset password
				 */
				sendResetPassword?: (
					/**
					 * @param user the user to send the
					 * reset password email to
					 * @param url the URL to send the reset password email to
					 * @param token the token to send to the user (could be used instead of sending the url
					 * if you need to redirect the user to custom route)
					 */
					data: { user: User; url: string; token: string },
					/**
					 * The request object
					 */
					request?: Request,
				) => Promise<void>;
				/**
				 * Number of seconds the reset password token is
				 * valid for.
				 * @default 1 hour (60 * 60)
				 */
				resetPasswordTokenExpiresIn?: number;
				/**
				 * A callback function that is triggered
				 * when a user's password is changed successfully.
				 */
				onPasswordReset?: (
					data: { user: User },
					request?: Request,
				) => Promise<void>;
				/**
				 * Password hashing and verification
				 *
				 * By default Scrypt is used for password hashing and
				 * verification. You can provide your own hashing and
				 * verification function. if you want to use a
				 * different algorithm.
				 */
				password?: {
					hash?: (password: string) => Promise<string>;
					verify?: (data: {
						hash: string;
						password: string;
					}) => Promise<boolean>;
				};
				/**
				 * Automatically sign in the user after sign up
				 *
				 * @default true
				 */
				autoSignIn?: boolean;
				/**
				 * Whether to revoke all other sessions when resetting password
				 * @default false
				 */
				revokeSessionsOnPasswordReset?: boolean;
				/**
				 * A callback function that is triggered when a user tries to sign up
				 * with an email that already exists. Useful for notifying the existing user
				 * that someone attempted to register with their email.
				 *
				 * This is only called when `requireEmailVerification: true` or `autoSignIn: false`.
				 */
				onExistingUserSignUp?: (
					/**
					 * @param user the existing user from the database
					 */
					data: { user: User },
					request?: Request,
				) => Promise<void>;
				/**
				 * Build a custom synthetic user for email enumeration
				 * protection. When a sign-up attempt is made with an
				 * email that already exists, this function is called
				 * to build the fake user response.
				 *
				 * Use this when plugins add fields to the user table
				 * (e.g. admin plugin adds `role`, `banned`, etc.)
				 * to ensure the fake response is indistinguishable
				 * from a real sign-up.
				 *
				 * @example
				 * ```ts
				 * customSyntheticUser: ({ coreFields, additionalFields, id }) => ({
				 *   ...coreFields,
				 *   role: "user",
				 *   banned: false,
				 *   banReason: null,
				 *   banExpires: null,
				 *   ...additionalFields,
				 *   id,
				 * })
				 * ```
				 */
				customSyntheticUser?: (params: {
					/** Core user fields: name, email, emailVerified, image, createdAt, updatedAt */
					coreFields: {
						name: string;
						email: string;
						emailVerified: boolean;
						image: string | null;
						createdAt: Date;
						updatedAt: Date;
					};
					/** Processed additional fields from options.user.additionalFields (with defaults applied) */
					additionalFields: Record<string, unknown>;
					/** Generated user ID */
					id: string;
				}) => Record<string, unknown>;
		  }
		| undefined;
	/**
	 * list of social providers
	 */
	socialProviders?: SocialProviders | undefined;
	/**
	 * List of Better Auth plugins
	 */
	plugins?: ([] | BetterAuthPlugin[]) | undefined;
	/**
	 * User configuration
	 */
	user?:
		| (BetterAuthDBOptions<"user", keyof BaseUser> & {
				/**
				 * Changing email configuration
				 */
				changeEmail?: {
					/**
					 * Enable changing email
					 * @default false
					 */
					enabled: boolean;
					/**
					 * Send a confirmation email to the old email address when the user changes their email.
					 * @param data the data object
					 * @param request the request object
					 */
					sendChangeEmailConfirmation?: (
						data: {
							user: User;
							newEmail: string;
							url: string;
							token: string;
						},
						request?: Request,
					) => Promise<void>;
					/**
					 * Update the email without verification if the user is not verified.
					 * @default false
					 */
					updateEmailWithoutVerification?: boolean;
				};
				/**
				 * User deletion configuration
				 */
				deleteUser?: {
					/**
					 * Enable user deletion
					 */
					enabled?: boolean;
					/**
					 * Send a verification email when the user deletes their account.
					 *
					 * if this is not set, the user will be deleted immediately.
					 * @param data the data object
					 * @param request the request object
					 */
					sendDeleteAccountVerification?: (
						data: {
							user: User;
							url: string;
							token: string;
						},
						request?: Request,
					) => Promise<void>;
					/**
					 * A function that is called before a user is deleted.
					 *
					 * to interrupt with error you can throw `APIError`
					 */
					beforeDelete?: (user: User, request?: Request) => Promise<void>;
					/**
					 * A function that is called after a user is deleted.
					 *
					 * This is useful for cleaning up user data
					 */
					afterDelete?: (user: User, request?: Request) => Promise<void>;
					/**
					 * The expiration time for the delete token.
					 *
					 * @default 1 day (60 * 60 * 24) in seconds
					 */
					deleteTokenExpiresIn?: number;
				};
		  })
		| undefined;
	session?:
		| (BetterAuthDBOptions<"session", keyof BaseSession> & {
				/**
				 * Expiration time for the session token. The value
				 * should be in seconds.
				 * @default 7 days (60 * 60 * 24 * 7)
				 */
				expiresIn?: number;
				/**
				 * How often the session should be refreshed. The value
				 * should be in seconds.
				 * If set 0 the session will be refreshed every time it is used.
				 * @default 1 day (60 * 60 * 24)
				 */
				updateAge?: number;
				/**
				 * Disable session refresh so that the session is not updated
				 * regardless of the `updateAge` option.
				 *
				 * @default false
				 */
				disableSessionRefresh?: boolean;
				/**
				 * Defer session refresh writes to POST requests.
				 * When enabled, GET is read-only and POST performs refresh.
				 * Useful for read-replica database setups.
				 *
				 * @default false
				 */
				deferSessionRefresh?: boolean;
				/**
				 * By default if secondary storage is provided
				 * the session is stored in the secondary storage.
				 *
				 * Set this to true to store the session in the database
				 * as well.
				 *
				 * Reads are always done from the secondary storage.
				 *
				 * @default false
				 */
				storeSessionInDatabase?: boolean;
				/**
				 * By default, sessions are deleted from the database when secondary storage
				 * is provided when session is revoked.
				 *
				 * Set this to true to preserve session records in the database,
				 * even if they are deleted from the secondary storage.
				 *
				 * @default false
				 */
				preserveSessionInDatabase?: boolean;
				/**
				 * Enable caching session in cookie
				 */
				cookieCache?: {
					/**
					 * max age of the cookie
					 * @default 5 minutes (5 * 60)
					 */
					maxAge?: number;
					/**
					 * Enable caching session in cookie
					 * @default false
					 */
					enabled?: boolean;
					/**
					 * Strategy for encoding/decoding cookie cache
					 *
					 * - "compact": Uses base64url encoding with HMAC-SHA256 signature (compact format, no JWT spec overhead)
					 * - "jwt": Uses JWT with HMAC signature (no encryption, follows JWT spec)
					 * - "jwe": Uses JWE (JSON Web Encryption) with A256CBC-HS512 and HKDF key derivation for secure encrypted tokens
					 *
					 * @default "compact"
					 */
					strategy?: "compact" | "jwt" | "jwe";
					/**
					 * Controls stateless cookie cache refresh behavior.
					 *
					 * When enabled, the cookie cache will be automatically refreshed before expiry
					 * WITHOUT querying the database. This is essential for fully stateless or DB-less scenarios.
					 *
					 * - `false`: Disable automatic refresh. Cache is only invalidated when it reaches maxAge expiry.
					 * - `true`: Enable automatic refresh with default settings (refreshes when 80% of maxAge is reached).
					 * - `object`: Custom refresh configuration with either `updateAge` or `shouldRefresh` function
					 *
					 * Note: When the cache expires (reaches maxAge), it will attempt to fetch from database if available.
					 * The refreshCache option is specifically for refreshing BEFORE expiry in a stateless manner.
					 *
					 * @default false
					 */
					refreshCache?:
						| boolean
						| {
								/**
								 * Time in seconds before expiry when the cache should be refreshed.
								 * For example, if maxAge is 300 (5 minutes) and updateAge is 60,
								 * the cache will be refreshed when it has 60 seconds left before expiry.
								 *
								 * @default 20% of maxAge
								 */
								updateAge?: number;
						  };
					/**
					 * Version of the cookie cache
					 *
					 * If a cookie cache version is changed, all existing cookie caches with the old version
					 * will be invalidated.
					 *
					 * It can be a string or a function that returns a string or a promise that returns a string.
					 * If it's a function, it will be called with the session and user data
					 *
					 * @default "1"
					 */
					version?:
						| string
						| ((
								session: Session & Record<string, any>,
								user: User & Record<string, any>,
						  ) => string)
						| ((
								session: Session & Record<string, any>,
								user: User & Record<string, any>,
						  ) => Promise<string>);
				};
				/**
				 * The age of the session to consider it fresh.
				 *
				 * This is used to check if the session is fresh
				 * for sensitive operations. (e.g. deleting an account)
				 *
				 * If the session is not fresh, the user should be prompted
				 * to sign in again.
				 *
				 * If set to 0, the session will be considered fresh every time. (⚠︎ not recommended)
				 *
				 * @default 1 day (60 * 60 * 24)
				 */
				freshAge?: number;
		  })
		| undefined;
	account?:
		| (BetterAuthDBOptions<"account", keyof BaseAccount> & {
				/**
				 * When enabled (true), the user account data (accessToken, idToken, refreshToken, etc.)
				 * will be updated on sign in with the latest data from the provider.
				 *
				 * @default true
				 */
				updateAccountOnSignIn?: boolean;
				/**
				 * Configuration for account linking.
				 */
				accountLinking?: {
					/**
					 * Enable account linking
					 *
					 * @default true
					 */
					enabled?: boolean;
					/**
					 * Disable implicit account linking on sign-in.
					 *
					 * When enabled, accounts will not be automatically linked
					 * during OAuth sign-in, even if the email is verified or
					 * the provider is trusted. Users must explicitly link
					 * accounts using `linkSocial()` while authenticated.
					 *
					 * @default false
					 */
					disableImplicitLinking?: boolean;
					/**
					 * List of trusted providers. Can be a static array or a function
					 * that returns providers dynamically. The function is called
					 * during context init (with `request` undefined) and again
					 * on each request (with the incoming Request). It must be
					 * resilient to `request` being undefined.
					 *
					 * @example
					 * ```ts
					 * trustedProviders: ["google", "github"]
					 * ```
					 *
					 * @example
					 * ```ts
					 * trustedProviders: async (request) => {
					 *   if (!request) return [];
					 *   const providers = await getTrustedProvidersForTenant(request);
					 *   return providers;
					 * }
					 * ```
					 */
					trustedProviders?:
						| Array<
								LiteralUnion<
									SocialProviderList[number] | "email-password",
									string
								>
						  >
						| ((
								request?: Request | undefined,
						  ) => Awaitable<
								Array<
									LiteralUnion<
										SocialProviderList[number] | "email-password",
										string
									>
								>
						  >);
					/**
					 * If enabled (true), this will allow users to manually linking accounts with different email addresses than the main user.
					 *
					 * @default false
					 *
					 * ⚠️ Warning: enabling this might lead to account takeovers, so proceed with caution.
					 */
					allowDifferentEmails?: boolean;
					/**
					 * If enabled (true), this will allow users to unlink all accounts.
					 *
					 * @default false
					 */
					allowUnlinkingAll?: boolean;
					/**
					 * If enabled (true), this will update the user information based on the newly linked account
					 *
					 * @default false
					 */
					updateUserInfoOnLink?: boolean;
				};
				/**
				 * Encrypt OAuth tokens
				 *
				 * By default, OAuth tokens (access tokens, refresh tokens, ID tokens) are stored in plain text in the database.
				 * This poses a security risk if your database is compromised, as attackers could gain access to user accounts
				 * on external services.
				 *
				 * When enabled, tokens are encrypted using AES-256-GCM before storage, providing protection against:
				 * - Database breaches and unauthorized access to raw token data
				 * - Internal threats from database administrators or compromised credentials
				 * - Token exposure in database backups and logs
				 * @default false
				 */
				encryptOAuthTokens?: boolean;
				/**
				 * Skip state cookie check
				 *
				 * ⚠︎ this has security implications and should only be enabled if you know what you are doing.
				 * @default false
				 */
				skipStateCookieCheck?: boolean;
				/**
				 * Strategy for storing OAuth state
				 *
				 * - "cookie": Store state in an encrypted cookie (stateless)
				 * - "database": Store state in the database
				 *
				 * @default "cookie"
				 */
				storeStateStrategy?: "database" | "cookie";
				/**
				 * Store account data after oauth flow on a cookie
				 *
				 * This is useful for database-less flow
				 *
				 * @default false
				 *
				 * @note This is automatically set to true if you haven't passed a database
				 */
				storeAccountCookie?: boolean;
		  })
		| undefined;
	verification?:
		| (BetterAuthDBOptions<"verification", keyof BaseVerification> & {
				/**
				 * disable cleaning up expired values when a verification value is
				 * fetched
				 */
				disableCleanup?: boolean;
				/**
				 * How to store verification identifiers (tokens, OTPs, etc.)
				 *
				 * @example "hashed"
				 *
				 * @default "plain"
				 */
				storeIdentifier?:
					| StoreIdentifierOption
					| {
							default: StoreIdentifierOption;
							overrides?: Record<string, StoreIdentifierOption>;
					  };
				/**
				 * Store verification data in database even when secondary storage is configured.
				 * @default false
				 */
				storeInDatabase?: boolean;
		  })
		| undefined;
	/**
	 * Additional trusted origins. By default, Better Auth trusts your
	 * app's {@link baseURL}. Use this option to allow additional origins
	 * (e.g. a separate frontend domain).
	 *
	 * Can be a static array, a function that returns origins dynamically,
	 * or use wildcard patterns (e.g. `"https://*.example.com"`).
	 *
	 * @param request - The request object.
	 * It'll be undefined if no request was
	 * made. Like during a create context call
	 * or `auth.api` call.
	 *
	 * Trusted origins will be dynamically
	 * calculated based on the request.
	 *
	 * @example
	 * ```ts
	 * trustedOrigins: async (request) => {
	 *   return [
	 *    "https://better-auth.com",
	 *    "https://*.better-auth.com",
	 *    request.headers.get("x-custom-origin")
	 *   ];
	 * }
	 * ```
	 * @returns An array of trusted origins.
	 */
	trustedOrigins?:
		| (
				| string[]
				| ((
						request?: Request | undefined,
				  ) => Awaitable<(string | undefined | null)[]>)
		  )
		| undefined;
	/**
	 * Rate limiting configuration
	 */
	rateLimit?: BetterAuthRateLimitOptions | undefined;
	/**
	 * Advanced options
	 */
	advanced?: BetterAuthAdvancedOptions | undefined;
	logger?: Logger | undefined;
	/**
	 * allows you to define custom hooks that can be
	 * executed during lifecycle of core database
	 * operations.
	 */
	databaseHooks?:
		| {
				/**
				 * User hooks
				 */
				user?: {
					create?: {
						/**
						 * Hook that is called before a user is created.
						 * if the hook returns false, the user will not be created.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							user: User & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<User> & Record<string, any>;
							  }
						>;
						/**
						 * Hook that is called after a user is created.
						 */
						after?: (
							user: User & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					update?: {
						/**
						 * Hook that is called before a user is updated.
						 * if the hook returns false, the user will not be updated.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							user: Partial<User> & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<User & Record<string, any>>;
							  }
						>;
						/**
						 * Hook that is called after a user is updated.
						 */
						after?: (
							user: User & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					delete?: {
						/**
						 * Hook that is called before a user is deleted.
						 * if the hook returns false, the user will not be deleted.
						 */
						before?: (
							user: User & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<boolean | void>;
						/**
						 * Hook that is called after a user is deleted.
						 */
						after?: (
							user: User & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
				};
				/**
				 * Session Hook
				 */
				session?: {
					create?: {
						/**
						 * Hook that is called before a session is created.
						 * if the hook returns false, the session will not be created.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							session: Session & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Session> & Record<string, any>;
							  }
						>;
						/**
						 * Hook that is called after a session is created.
						 */
						after?: (
							session: Session & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					/**
					 * Update hook
					 */
					update?: {
						/**
						 * Hook that is called before a user is updated.
						 * if the hook returns false, the session will not be updated.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							session: Partial<Session> & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Session & Record<string, any>>;
							  }
						>;
						/**
						 * Hook that is called after a session is updated.
						 */
						after?: (
							session: Session & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					delete?: {
						/**
						 * Hook that is called before a session is deleted.
						 * if the hook returns false, the session will not be deleted.
						 */
						before?: (
							session: Session & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<boolean | void>;
						/**
						 * Hook that is called after a session is deleted.
						 */
						after?: (
							session: Session & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
				};
				/**
				 * Account Hook
				 */
				account?: {
					create?: {
						/**
						 * Hook that is called before a account is created.
						 * If the hook returns false, the account will not be created.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							account: Account,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Account> & Record<string, any>;
							  }
						>;
						/**
						 * Hook that is called after a account is created.
						 */
						after?: (
							account: Account,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					/**
					 * Update hook
					 */
					update?: {
						/**
						 * Hook that is called before a account is update.
						 * If the hook returns false, the user will not be updated.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							account: Partial<Account> & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Account & Record<string, any>>;
							  }
						>;
						/**
						 * Hook that is called after a account is updated.
						 */
						after?: (
							account: Account & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					delete?: {
						/**
						 * Hook that is called before an account is deleted.
						 * if the hook returns false, the account will not be deleted.
						 */
						before?: (
							account: Account & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<boolean | void>;
						/**
						 * Hook that is called after an account is deleted.
						 */
						after?: (
							account: Account & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
				};
				/**
				 * Verification Hook
				 */
				verification?: {
					create?: {
						/**
						 * Hook that is called before a verification is created.
						 * if the hook returns false, the verification will not be created.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							verification: Verification & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Verification> & Record<string, any>;
							  }
						>;
						/**
						 * Hook that is called after a verification is created.
						 */
						after?: (
							verification: Verification & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					update?: {
						/**
						 * Hook that is called before a verification is updated.
						 * if the hook returns false, the verification will not be updated.
						 * If the hook returns an object, it'll be used instead of the original data
						 */
						before?: (
							verification: Partial<Verification> & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<
							| boolean
							| void
							| {
									data: Optional<Verification & Record<string, any>>;
							  }
						>;
						/**
						 * Hook that is called after a verification is updated.
						 */
						after?: (
							verification: Verification & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
					delete?: {
						/**
						 * Hook that is called before a verification is deleted.
						 * if the hook returns false, the verification will not be deleted.
						 */
						before?: (
							verification: Verification & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<boolean | void>;
						/**
						 * Hook that is called after a verification is deleted.
						 */
						after?: (
							verification: Verification & Record<string, unknown>,
							context: GenericEndpointContext | null,
						) => Promise<void>;
					};
				};
		  }
		| undefined;
	/**
	 * API error handling
	 */
	onAPIError?:
		| {
				/**
				 * Throw an error on API error
				 *
				 * @default false
				 */
				throw?: boolean;
				/**
				 * Custom error handler
				 *
				 * @param error
				 * @param ctx - Auth context
				 */
				onError?: (error: unknown, ctx: AuthContext) => void | Promise<void>;
				/**
				 * The URL to redirect to on error
				 *
				 * When errorURL is provided, the error will be added to the URL as a query parameter
				 * and the user will be redirected to the errorURL.
				 *
				 * @default - "/api/auth/error"
				 */
				errorURL?: string;
				/**
				 * Configure the default error page provided by Better-Auth
				 * Start your dev server and go to /api/auth/error to see the error page.
				 */
				customizeDefaultErrorPage?: {
					colors?: {
						background?: string;
						foreground?: string;
						primary?: string;
						primaryForeground?: string;
						mutedForeground?: string;
						border?: string;
						destructive?: string;
						titleBorder?: string;
						titleColor?: string;
						gridColor?: string;
						cardBackground?: string;
						cornerBorder?: string;
					};
					size?: {
						radiusSm?: string;
						radiusMd?: string;
						radiusLg?: string;
						textSm?: string;
						text2xl?: string;
						text4xl?: string;
						text6xl?: string;
					};
					font?: {
						defaultFamily?: string;
						monoFamily?: string;
					};
					disableTitleBorder?: boolean;
					disableCornerDecorations?: boolean;
					disableBackgroundGrid?: boolean;
				};
		  }
		| undefined;
	/**
	 * Hooks
	 */
	hooks?:
		| {
				/**
				 * Before a request is processed
				 */
				before?: AuthMiddleware;
				/**
				 * After a request is processed
				 */
				after?: AuthMiddleware;
		  }
		| undefined;
	/**
	 * Disabled paths
	 *
	 * Paths you want to disable.
	 */
	disabledPaths?: string[] | undefined;
	/**
	 * Telemetry configuration
	 */
	telemetry?:
		| {
				/**
				 * Enable telemetry collection
				 *
				 * @default false
				 */
				enabled?: boolean;
				/**
				 * Enable debug mode
				 *
				 * @default false
				 */
				debug?: boolean;
		  }
		| undefined;
	/**
	 * Experimental features
	 */
	experimental?: {
		/**
		 * Enable experimental joins for your database adapter.
		 *
		 * 	Please read the adapter documentation for more information regarding joins before enabling this.
		 * 	Not all adapters support joins.
		 *
		 * @default false
		 */
		joins?: boolean;
	};
};