// Creates and seeds the Waseel database tables (local/self-hosted PostgreSQL).
// Usage: node scripts/seed-db.mjs   (reads DATABASE_URL from .env)

import pg from "pg";
import { readFileSync } from "fs";

const env = readFileSync(new URL("../.env", import.meta.url), "utf8");
const databaseUrl = env
  .split("\n")
  .find((l) => l.startsWith("DATABASE_URL="))
  ?.split("=")
  .slice(1)
  .join("=")
  .trim()
  .replace(/^"|"$/g, "");

if (!databaseUrl) {
  console.error("DATABASE_URL not found in .env");
  process.exit(1);
}

const pool = new pg.Pool({ connectionString: databaseUrl });

const sql = async (strings, ...values) => {
  const text = strings.reduce(
    (acc, chunk, i) => acc + chunk + (i < values.length ? `$${i + 1}` : ""),
    "",
  );
  const result = await pool.query(text, values);
  return result.rows;
};

// Migrate databases created during the Clerk era (clerk_id column, no UNIQUE email).
const clerkCol = await sql`
  SELECT 1 FROM information_schema.columns
  WHERE table_name = 'users' AND column_name = 'clerk_id'
`;
if (clerkCol.length > 0) {
  await sql`ALTER TABLE users DROP COLUMN clerk_id`;
  console.log("Dropped legacy clerk_id column from users.");
}

// Rebuild legacy tables where users.id / rides.user_id are not UUID.
const idType = await sql`
  SELECT data_type FROM information_schema.columns
  WHERE table_name = 'users' AND column_name = 'id'
`;
if (idType.length > 0 && idType[0]?.data_type !== "uuid") {
  console.log("Detected legacy non-UUID users schema, rebuilding users/rides...");
  await sql`DROP TABLE IF EXISTS rides`;
  await sql`DROP TABLE IF EXISTS users CASCADE`;
  console.log("Legacy users/rides tables dropped (test data only).");
}

await sql`CREATE TABLE IF NOT EXISTS users (
  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
  name VARCHAR(255) NOT NULL,
  email VARCHAR(255) NOT NULL UNIQUE,
  phone VARCHAR(20),
  password_hash TEXT,
  google_sub TEXT UNIQUE,
  email_verified BOOLEAN NOT NULL DEFAULT FALSE,
  role VARCHAR(20),
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)`;

// For databases created before self-hosted auth existed.
await sql`ALTER TABLE users ADD COLUMN IF NOT EXISTS role VARCHAR(20)`;
await sql`ALTER TABLE users ADD COLUMN IF NOT EXISTS phone VARCHAR(20)`;
await sql`ALTER TABLE users ADD COLUMN IF NOT EXISTS password_hash TEXT`;
await sql`ALTER TABLE users ADD COLUMN IF NOT EXISTS google_sub TEXT`;
await sql`ALTER TABLE users ADD COLUMN IF NOT EXISTS email_verified BOOLEAN NOT NULL DEFAULT FALSE`;

// email must be UNIQUE for ON CONFLICT (email) upserts in register+api.ts.
const emailUnique = await sql`
  SELECT 1 FROM pg_constraint
  WHERE conrelid = 'users'::regclass AND contype = 'u'
    AND conkey @> ARRAY[
      (SELECT attnum::smallint FROM pg_attribute
       WHERE attrelid = 'users'::regclass AND attname = 'email')
    ]
`;
if (emailUnique.length === 0) {
  await sql`ALTER TABLE users ADD CONSTRAINT users_email_unique UNIQUE (email)`;
  console.log("Added unique constraint on users.email.");
}

await sql`CREATE TABLE IF NOT EXISTS email_verification_codes (
  email VARCHAR(255) PRIMARY KEY,
  code_hash TEXT NOT NULL,
  attempts INTEGER NOT NULL DEFAULT 0,
  expires_at TIMESTAMP NOT NULL
)`;

await sql`CREATE TABLE IF NOT EXISTS password_reset_codes (
  email VARCHAR(255) PRIMARY KEY,
  code_hash TEXT NOT NULL,
  attempts INTEGER NOT NULL DEFAULT 0,
  expires_at TIMESTAMP NOT NULL
)`;

await sql`CREATE TABLE IF NOT EXISTS drivers (
  id SERIAL PRIMARY KEY,
  first_name VARCHAR(100) NOT NULL,
  last_name VARCHAR(100) NOT NULL,
  profile_image_url TEXT,
  car_image_url TEXT,
  car_seats INTEGER NOT NULL,
  rating NUMERIC(2,1) NOT NULL
)`;

// Driver profiles are linked to a user account (in-app driver onboarding) and
// carry the live state the dispatch engine needs.
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS user_id UUID REFERENCES users(id) ON DELETE SET NULL`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS service VARCHAR(20) NOT NULL DEFAULT 'car'`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS latitude DOUBLE PRECISION`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS longitude DOUBLE PRECISION`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS online BOOLEAN NOT NULL DEFAULT FALSE`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS last_seen TIMESTAMPTZ`;
await sql`ALTER TABLE drivers ADD COLUMN IF NOT EXISTS car_model VARCHAR(100)`;
// One driver profile per user account (legacy seed rows have NULL user_id).
await sql`CREATE UNIQUE INDEX IF NOT EXISTS drivers_user_id_key ON drivers(user_id) WHERE user_id IS NOT NULL`;
await sql`CREATE INDEX IF NOT EXISTS drivers_service_online_idx ON drivers(service, online)`;

await sql`CREATE TABLE IF NOT EXISTS rides (
  ride_id SERIAL PRIMARY KEY,
  origin_address TEXT NOT NULL,
  destination_address TEXT NOT NULL,
  origin_latitude DOUBLE PRECISION NOT NULL,
  origin_longitude DOUBLE PRECISION NOT NULL,
  destination_latitude DOUBLE PRECISION NOT NULL,
  destination_longitude DOUBLE PRECISION NOT NULL,
  ride_time INTEGER NOT NULL,
  fare_price INTEGER NOT NULL,
  payment_status VARCHAR(50) NOT NULL,
  driver_id INTEGER NOT NULL REFERENCES drivers(id),
  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  payment_order_id TEXT,
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)`;

// Link a ride to the server-authoritative payment order that paid for it.
await sql`ALTER TABLE rides ADD COLUMN IF NOT EXISTS payment_order_id TEXT`;

// Ride lifecycle state machine: requested -> accepted -> en_route -> completed
// (or cancelled). A requested ride has no driver yet — auto-match assigns one
// when a driver accepts, so driver_id must be nullable.
await sql`ALTER TABLE rides ADD COLUMN IF NOT EXISTS status VARCHAR(20) NOT NULL DEFAULT 'requested'`;
await sql`ALTER TABLE rides ADD COLUMN IF NOT EXISTS service VARCHAR(20) NOT NULL DEFAULT 'car'`;
await sql`ALTER TABLE rides ADD COLUMN IF NOT EXISTS completed_at TIMESTAMPTZ`;
await sql`ALTER TABLE rides ADD COLUMN IF NOT EXISTS cancelled_at TIMESTAMPTZ`;
await sql`
  ALTER TABLE rides ALTER COLUMN driver_id DROP NOT NULL
`;
await sql`CREATE INDEX IF NOT EXISTS rides_user_id_idx ON rides(user_id)`;
await sql`CREATE INDEX IF NOT EXISTS rides_driver_id_idx ON rides(driver_id)`;
await sql`CREATE INDEX IF NOT EXISTS rides_status_idx ON rides(status)`;

// Server-authoritative record of each card payment intent. The client never
// supplies payment_status or the successIndicator; both live here and are
// verified against the gateway before an order can be consumed for a ride.
await sql`CREATE TABLE IF NOT EXISTS payment_orders (
  order_id TEXT PRIMARY KEY,
  user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
  amount_cents INTEGER NOT NULL,
  currency VARCHAR(8) NOT NULL DEFAULT 'USD',
  driver_id INTEGER REFERENCES drivers(id),
  origin_address TEXT,
  destination_address TEXT,
  origin_latitude DOUBLE PRECISION,
  origin_longitude DOUBLE PRECISION,
  destination_latitude DOUBLE PRECISION,
  destination_longitude DOUBLE PRECISION,
  ride_time INTEGER,
  success_indicator TEXT,
  status VARCHAR(20) NOT NULL DEFAULT 'pending',
  created_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
  paid_at TIMESTAMPTZ
)`;

await sql`CREATE INDEX IF NOT EXISTS payment_orders_user_id_idx ON payment_orders(user_id)`;

// Dispatch: each attempt to match a requested ride to a driver is recorded as
// an offer. A driver polls for status='offered' rows assigned to them; accept
// flips the ride to 'accepted', decline/expiry triggers the next-nearest match.
await sql`CREATE TABLE IF NOT EXISTS ride_offers (
  id SERIAL PRIMARY KEY,
  ride_id INTEGER NOT NULL REFERENCES rides(ride_id) ON DELETE CASCADE,
  driver_id INTEGER NOT NULL REFERENCES drivers(id),
  status VARCHAR(20) NOT NULL DEFAULT 'offered',
  offered_at TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
  responded_at TIMESTAMPTZ
)`;
await sql`CREATE INDEX IF NOT EXISTS ride_offers_driver_status_idx ON ride_offers(driver_id, status)`;
await sql`CREATE INDEX IF NOT EXISTS ride_offers_ride_idx ON ride_offers(ride_id)`;

// No seed drivers: the drivers table starts empty. Real drivers are created
// in-app via onboarding (driver/profile POST), which links a drivers row to a
// real user account and gives it a live GPS position for matching.
console.log("Database ready.");

await pool.end();