import { QueryInterface, QueryTypes } from 'sequelize';

/**
 * Migration to migrate from multi-provider AI to Vertex AI Gemini
 * 
 * Removes:
 * - AI_PROVIDER
 * - CLAUDE_API_KEY, OPENAI_API_KEY, GEMINI_API_KEY
 * - CLAUDE_MODEL, OPENAI_MODEL, GEMINI_MODEL
 * - VERTEX_AI_MODEL (moved to environment variable only)
 * - VERTEX_AI_LOCATION (moved to environment variable only)
 * 
 * Note: Both VERTEX_AI_MODEL and VERTEX_AI_LOCATION are now configured via 
 * environment variables only (not in admin settings).
 * 
 * This migration is idempotent - it will only delete configs that exist.
 */
export async function up(queryInterface: QueryInterface): Promise<void> {
  // Remove old AI provider configurations
  await queryInterface.sequelize.query(`
    DELETE FROM admin_configurations 
    WHERE config_key IN (
      'AI_PROVIDER',
      'CLAUDE_API_KEY',
      'OPENAI_API_KEY',
      'GEMINI_API_KEY',
      'CLAUDE_MODEL',
      'OPENAI_MODEL',
      'GEMINI_MODEL',
      'VERTEX_AI_MODEL',
      'VERTEX_AI_LOCATION'
    )
  `, { type: QueryTypes.DELETE });
}

export async function down(queryInterface: QueryInterface): Promise<void> {
  // This migration only removes configs, so down migration would restore them
  // However, we don't restore them as they're now environment-only
  console.log('[Migration] Down migration skipped - AI configs are now environment-only');

  // Restore old configurations (for rollback)
  await queryInterface.sequelize.query(`
    INSERT INTO admin_configurations (
      config_id, config_key, config_category, config_value, value_type,
      display_name, description, default_value, is_editable, is_sensitive,
      validation_rules, ui_component, options, sort_order, requires_restart,
      last_modified_by, last_modified_at, created_at, updated_at
    ) VALUES
    (
      gen_random_uuid(),
      'AI_PROVIDER',
      'AI_CONFIGURATION',
      'claude',
      'STRING',
      'AI Provider',
      'Active AI provider for conclusion generation (claude, openai, or gemini)',
      'claude',
      true,
      false,
      '{"enum": ["claude", "openai", "gemini"], "required": true}'::jsonb,
      'select',
      '["claude", "openai", "gemini"]'::jsonb,
      22,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'CLAUDE_API_KEY',
      'AI_CONFIGURATION',
      '',
      'STRING',
      'Claude API Key',
      'API key for Claude (Anthropic) - Get from console.anthropic.com',
      '',
      true,
      true,
      '{"pattern": "^sk-ant-", "minLength": 40}'::jsonb,
      'input',
      NULL,
      23,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'OPENAI_API_KEY',
      'AI_CONFIGURATION',
      '',
      'STRING',
      'OpenAI API Key',
      'API key for OpenAI (GPT-4) - Get from platform.openai.com',
      '',
      true,
      true,
      '{"pattern": "^sk-", "minLength": 40}'::jsonb,
      'input',
      NULL,
      24,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'GEMINI_API_KEY',
      'AI_CONFIGURATION',
      '',
      'STRING',
      'Gemini API Key',
      'API key for Gemini (Google) - Get from ai.google.dev',
      '',
      true,
      true,
      '{"minLength": 20}'::jsonb,
      'input',
      NULL,
      25,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'CLAUDE_MODEL',
      'AI_CONFIGURATION',
      'claude-sonnet-4-20250514',
      'STRING',
      'Claude Model',
      'Claude (Anthropic) model to use for AI generation',
      'claude-sonnet-4-20250514',
      true,
      false,
      '{}'::jsonb,
      'input',
      NULL,
      27,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'OPENAI_MODEL',
      'AI_CONFIGURATION',
      'gpt-4o',
      'STRING',
      'OpenAI Model',
      'OpenAI model to use for AI generation',
      'gpt-4o',
      true,
      false,
      '{}'::jsonb,
      'input',
      NULL,
      28,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    ),
    (
      gen_random_uuid(),
      'GEMINI_MODEL',
      'AI_CONFIGURATION',
      'gemini-2.0-flash-lite',
      'STRING',
      'Gemini Model',
      'Gemini (Google) model to use for AI generation',
      'gemini-2.0-flash-lite',
      true,
      false,
      '{}'::jsonb,
      'input',
      NULL,
      29,
      false,
      NULL,
      NULL,
      NOW(),
      NOW()
    )
    ON CONFLICT (config_key) DO NOTHING
  `, { type: QueryTypes.INSERT });
}