const db = require('./db');
const logger = require('../utils/logger');

const initDatabase = async () => {
  const client = await db.getClient();

  try {
    await client.query('BEGIN');

    // Create enum types
    await client.query(`
      DO $$ BEGIN
        CREATE TYPE resource_type AS ENUM (
          'food_bank',
          'community_meal',
          'hamper',
          'pantry',
          'soup_kitchen',
          'mobile_food',
          'grocery_program',
          'other'
        );
      EXCEPTION
        WHEN duplicate_object THEN null;
      END $$;
    `);

    await client.query(`
      DO $$ BEGIN
        CREATE TYPE data_source AS ENUM (
          'informalberta',
          'ab211',
          'edmonton_foodbank_pdf',
          'manual'
        );
      EXCEPTION
        WHEN duplicate_object THEN null;
      END $$;
    `);

    // Create main resources table
    await client.query(`
      CREATE TABLE IF NOT EXISTS food_resources (
        id SERIAL PRIMARY KEY,
        name VARCHAR(500) NOT NULL,
        description TEXT,
        resource_type resource_type DEFAULT 'other',

        -- Location info
        address VARCHAR(500),
        city VARCHAR(100),
        province VARCHAR(50) DEFAULT 'Alberta',
        postal_code VARCHAR(10),
        latitude DECIMAL(10, 8),
        longitude DECIMAL(11, 8),

        -- Contact info
        phone VARCHAR(50),
        email VARCHAR(255),
        website VARCHAR(500),

        -- Operating info
        hours_of_operation TEXT,
        eligibility TEXT,
        services_offered TEXT,

        -- Meta info
        source data_source NOT NULL,
        source_url VARCHAR(500),
        source_id VARCHAR(100),

        -- Timestamps
        created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
        last_verified_at TIMESTAMP WITH TIME ZONE,

        -- Status
        is_active BOOLEAN DEFAULT true,

        -- Unique constraint on source + source_id
        UNIQUE(source, source_id)
      );
    `);

    // Create indexes
    await client.query(`
      CREATE INDEX IF NOT EXISTS idx_food_resources_city ON food_resources(city);
      CREATE INDEX IF NOT EXISTS idx_food_resources_type ON food_resources(resource_type);
      CREATE INDEX IF NOT EXISTS idx_food_resources_active ON food_resources(is_active);
      CREATE INDEX IF NOT EXISTS idx_food_resources_location ON food_resources(latitude, longitude);
    `);

    // Create scrape logs table
    await client.query(`
      CREATE TABLE IF NOT EXISTS scrape_logs (
        id SERIAL PRIMARY KEY,
        source data_source NOT NULL,
        started_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
        completed_at TIMESTAMP WITH TIME ZONE,
        status VARCHAR(50) DEFAULT 'running',
        records_found INTEGER DEFAULT 0,
        records_added INTEGER DEFAULT 0,
        records_updated INTEGER DEFAULT 0,
        error_message TEXT
      );
    `);

    // Create listing update requests table
    await client.query(`
      CREATE TABLE IF NOT EXISTS listing_update_requests (
        id SERIAL PRIMARY KEY,
        resource_id INTEGER REFERENCES food_resources(id) ON DELETE CASCADE,
        submitter_email VARCHAR(255) NOT NULL,
        submitter_name VARCHAR(255),

        -- Proposed changes (null = no change requested)
        proposed_name VARCHAR(500),
        proposed_description TEXT,
        proposed_resource_type resource_type,
        proposed_address VARCHAR(500),
        proposed_city VARCHAR(100),
        proposed_phone VARCHAR(50),
        proposed_email VARCHAR(255),
        proposed_website VARCHAR(500),
        proposed_hours_of_operation TEXT,
        proposed_eligibility TEXT,
        proposed_services_offered TEXT,

        additional_notes TEXT,

        status VARCHAR(20) DEFAULT 'pending',
        admin_notes TEXT,
        created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
        reviewed_at TIMESTAMP WITH TIME ZONE,
        reviewed_by VARCHAR(100)
      );
    `);

    // Create index for listing update requests
    await client.query(`
      CREATE INDEX IF NOT EXISTS idx_listing_update_requests_status ON listing_update_requests(status);
      CREATE INDEX IF NOT EXISTS idx_listing_update_requests_resource ON listing_update_requests(resource_id);
    `);

    // Create listing submissions table (for new listings submitted by users)
    await client.query(`
      CREATE TABLE IF NOT EXISTS listing_submissions (
        id SERIAL PRIMARY KEY,
        submitter_email VARCHAR(255) NOT NULL,
        submitter_name VARCHAR(255),

        -- Proposed listing data
        name VARCHAR(500) NOT NULL,
        description TEXT,
        resource_type resource_type DEFAULT 'other',
        address VARCHAR(500),
        city VARCHAR(100),
        phone VARCHAR(50),
        email VARCHAR(255),
        website VARCHAR(500),
        hours_of_operation TEXT,
        eligibility TEXT,
        services_offered TEXT,

        additional_notes TEXT,

        status VARCHAR(20) DEFAULT 'pending',
        admin_notes TEXT,
        created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
        reviewed_at TIMESTAMP WITH TIME ZONE,
        reviewed_by VARCHAR(100),
        created_resource_id INTEGER REFERENCES food_resources(id)
      );
    `);

    // Create indexes for listing submissions
    await client.query(`
      CREATE INDEX IF NOT EXISTS idx_listing_submissions_status ON listing_submissions(status);
    `);

    await client.query('COMMIT');
    logger.info('Database initialized successfully');

  } catch (error) {
    await client.query('ROLLBACK');
    logger.error('Database initialization failed', { error: error.message });
    throw error;
  } finally {
    client.release();
  }
};

// Run if called directly
if (require.main === module) {
  initDatabase()
    .then(() => {
      logger.info('Database setup complete');
      process.exit(0);
    })
    .catch((err) => {
      logger.error('Database setup failed', { error: err.message });
      process.exit(1);
    });
}

module.exports = { initDatabase };