-- Migration: Refactor telegram_integrations for single shared bot
-- and move Todoist webhook_token to separate table

-- ============================================
-- 1. Создаем таблицу todoist_integrations
-- ============================================
CREATE TABLE IF NOT EXISTS todoist_integrations (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    webhook_token VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT todoist_integrations_user_id_unique UNIQUE (user_id)
);

CREATE UNIQUE INDEX IF NOT EXISTS idx_todoist_integrations_webhook_token 
ON todoist_integrations(webhook_token);

CREATE INDEX IF NOT EXISTS idx_todoist_integrations_user_id 
ON todoist_integrations(user_id);

COMMENT ON TABLE todoist_integrations IS 'Todoist webhook integration settings per user';
COMMENT ON COLUMN todoist_integrations.webhook_token IS 'Unique token for Todoist webhook URL';

-- ============================================
-- 2. Мигрируем webhook_token из telegram_integrations в todoist_integrations
-- ============================================
INSERT INTO todoist_integrations (user_id, webhook_token, created_at, updated_at)
SELECT user_id, webhook_token, COALESCE(created_at, CURRENT_TIMESTAMP), CURRENT_TIMESTAMP
FROM telegram_integrations
WHERE webhook_token IS NOT NULL 
  AND webhook_token != ''
  AND user_id IS NOT NULL
ON CONFLICT (user_id) DO NOTHING;

-- ============================================
-- 3. Модифицируем telegram_integrations
-- ============================================

-- Удаляем bot_token (будет в .env)
ALTER TABLE telegram_integrations 
DROP COLUMN IF EXISTS bot_token;

-- Удаляем webhook_token (перенесли в todoist_integrations)
ALTER TABLE telegram_integrations 
DROP COLUMN IF EXISTS webhook_token;

-- Добавляем telegram_user_id
ALTER TABLE telegram_integrations 
ADD COLUMN IF NOT EXISTS telegram_user_id BIGINT;

-- Добавляем start_token для deep links
ALTER TABLE telegram_integrations 
ADD COLUMN IF NOT EXISTS start_token VARCHAR(255);

-- Добавляем timestamps если их нет
ALTER TABLE telegram_integrations 
ADD COLUMN IF NOT EXISTS created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP;

ALTER TABLE telegram_integrations 
ADD COLUMN IF NOT EXISTS updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP;

-- ============================================
-- 4. Создаем индексы
-- ============================================
CREATE UNIQUE INDEX IF NOT EXISTS idx_telegram_integrations_start_token 
ON telegram_integrations(start_token) 
WHERE start_token IS NOT NULL;

CREATE UNIQUE INDEX IF NOT EXISTS idx_telegram_integrations_telegram_user_id 
ON telegram_integrations(telegram_user_id) 
WHERE telegram_user_id IS NOT NULL;

-- Уникальность user_id
DROP INDEX IF EXISTS idx_telegram_integrations_user_id;
CREATE UNIQUE INDEX IF NOT EXISTS idx_telegram_integrations_user_id_unique 
ON telegram_integrations(user_id) 
WHERE user_id IS NOT NULL;

-- Индекс для поиска по chat_id
CREATE INDEX IF NOT EXISTS idx_telegram_integrations_chat_id 
ON telegram_integrations(chat_id) 
WHERE chat_id IS NOT NULL;

-- Удаляем старый индекс webhook_token
DROP INDEX IF EXISTS idx_telegram_integrations_webhook_token;

-- ============================================
-- 5. Очищаем данные Telegram для переподключения
-- ============================================
UPDATE telegram_integrations 
SET chat_id = NULL, 
    telegram_user_id = NULL,
    start_token = NULL,
    updated_at = CURRENT_TIMESTAMP;

-- ============================================
-- Комментарии
-- ============================================
COMMENT ON COLUMN telegram_integrations.telegram_user_id IS 'Telegram user ID (message.from.id)';
COMMENT ON COLUMN telegram_integrations.chat_id IS 'Telegram chat ID для отправки сообщений';
COMMENT ON COLUMN telegram_integrations.start_token IS 'Временный токен для deep link при первом подключении';