/**
 * Core bootstrap logic for creating a superuser and initial organization
 *
 * This is extracted from the CLI bootstrap command to make it reusable
 * and testable. It operates on a database transaction.
 */

import type { Database } from "@reviq/db-schema";
import type { Kysely, Transaction } from "kysely";
import { hashPassword } from "@reviq/server-utils";
import { generateToken, hashToken } from "./token.js";

/**
 * Input for the bootstrap operation
 */
export interface BootstrapInput {
  /** Email address for the superuser */
  email: string;
  /** Password for the superuser */
  password: string;
  /** Optional organization slug (defaults to "reviq") */
  orgSlug?: string;
  /** Optional organization display name (defaults to "RevIQ") */
  orgDisplayName?: string;
  /** Optional token name (defaults to "CLI bootstrap token") */
  tokenName?: string;
  /** Optional token expiration in days (defaults to 365) */
  tokenExpirationDays?: number;
  /** Delete existing user and org if they exist (defaults to false) */
  dangerouslyOverwriteExisting?: boolean;
}

/**
 * Result of the bootstrap operation
 */
export interface BootstrapResult {
  /** The created user */
  user: {
    id: number;
    email: string;
  };
  /** The created organization */
  org: {
    id: number;
    slug: string;
  };
  /** The created API token (raw token, not hashed) */
  token: string;
}

/**
 * Execute the bootstrap operation within a transaction
 *
 * Creates:
 * - A superuser with the given email and password
 * - An organization with the superuser as owner
 * - An API token for the superuser
 *
 * @param trx - Database transaction (use db.transaction() or pass a Transaction)
 * @param input - Bootstrap configuration
 * @returns The created user, org, and API token
 * @throws Error if user already exists or validation fails
 */
export const executeBootstrap = async (
  trx: Kysely<Database> | Transaction<Database>,
  input: BootstrapInput,
): Promise<BootstrapResult> => {
  const {
    email,
    password,
    orgSlug = "reviq",
    orgDisplayName = "RevIQ",
    tokenName = "CLI bootstrap token",
    tokenExpirationDays = 365,
    dangerouslyOverwriteExisting = false,
  } = input;

  // Validate password length
  if (password.length < 8) {
    throw new Error("Password must be at least 8 characters");
  }

  // Validate email format (basic check)
  if (!email.includes("@")) {
    throw new Error("Invalid email address");
  }

  const normalizedEmail = email.toLowerCase();

  // Handle overwrite mode - delete existing user and org
  if (dangerouslyOverwriteExisting) {
    // Delete existing user and related records
    const existingUser = await trx
      .selectFrom("users")
      .where("email", "=", normalizedEmail)
      .select("id")
      .executeTakeFirst();

    if (existingUser) {
      // Delete all user-related records (FK constraints)
      await trx
        .deleteFrom("api_tokens")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("email_verifications")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("login_requests")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("passkeys")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("password_resets")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("sessions")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("user_devices")
        .where("user_id", "=", existingUser.id)
        .execute();
      await trx
        .deleteFrom("org_members")
        .where("user_id", "=", existingUser.id)
        .execute();
      // Delete invites created by this user
      await trx
        .deleteFrom("org_invites")
        .where("invited_by", "=", existingUser.id)
        .execute();
      // Delete the user
      await trx.deleteFrom("users").where("id", "=", existingUser.id).execute();
    }

    // Delete existing org and related records
    const existingOrg = await trx
      .selectFrom("orgs")
      .where("slug", "=", orgSlug)
      .select("id")
      .executeTakeFirst();

    if (existingOrg) {
      // Delete all org-related records (FK constraints)
      await trx
        .deleteFrom("org_invites")
        .where("org_id", "=", existingOrg.id)
        .execute();
      await trx
        .deleteFrom("org_members")
        .where("org_id", "=", existingOrg.id)
        .execute();
      await trx
        .deleteFrom("org_sites")
        .where("org_id", "=", existingOrg.id)
        .execute();
      // Delete the org
      await trx.deleteFrom("orgs").where("id", "=", existingOrg.id).execute();
    }
  } else {
    // Check if user already exists (normal mode)
    const existing = await trx
      .selectFrom("users")
      .where("email", "=", normalizedEmail)
      .select("id")
      .executeTakeFirst();

    if (existing) {
      throw new Error(`User with email ${email} already exists`);
    }
  }

  // Hash the password
  const passwordHash = await hashPassword(password);

  // Create superuser
  const [user] = await trx
    .insertInto("users")
    .values({
      email: normalizedEmail,
      password_hash: passwordHash,
      is_superuser: true,
      email_verified_at: new Date(),
    })
    .returning(["id", "email"])
    .execute();

  if (!user) {
    throw new Error("Failed to create user");
  }

  // Create organization
  const [org] = await trx
    .insertInto("orgs")
    .values({
      slug: orgSlug,
      display_name: orgDisplayName,
    })
    .returning(["id", "slug"])
    .execute();

  if (!org) {
    throw new Error("Failed to create organization");
  }

  // Add user as owner of the org
  await trx
    .insertInto("org_members")
    .values({
      org_id: org.id,
      user_id: user.id,
      role: "owner",
    })
    .execute();

  // Generate API token
  const token = generateToken();
  const tokenHashValue = hashToken(token);

  await trx
    .insertInto("api_tokens")
    .values({
      user_id: user.id,
      token_hash: tokenHashValue,
      name: tokenName,
      expires_at: new Date(
        Date.now() + tokenExpirationDays * 24 * 60 * 60 * 1000,
      ),
    })
    .execute();

  return {
    user: {
      id: user.id,
      email: user.email,
    },
    org: {
      id: org.id,
      slug: org.slug,
    },
    token,
  };
};