-- Migration 068: Crawler Status Alerts
-- Creates status_alerts table for dashboard notifications and status change logging

-- ============================================================
-- STATUS ALERTS TABLE
-- ============================================================

CREATE TABLE IF NOT EXISTS crawler_status_alerts (
  id SERIAL PRIMARY KEY,

  -- References
  dispensary_id INTEGER REFERENCES dispensaries(id),
  profile_id INTEGER REFERENCES dispensary_crawler_profiles(id),

  -- Alert info
  alert_type VARCHAR(50) NOT NULL, -- 'status_change', 'crawl_error', 'validation_failed', 'promoted', 'demoted'
  severity VARCHAR(20) DEFAULT 'info', -- 'info', 'warning', 'error', 'critical'

  -- Status transition
  previous_status VARCHAR(50),
  new_status VARCHAR(50),

  -- Context
  message TEXT,
  error_details JSONB,
  metadata JSONB, -- Additional context (product counts, error codes, etc.)

  -- Tracking
  acknowledged BOOLEAN DEFAULT FALSE,
  acknowledged_at TIMESTAMP WITH TIME ZONE,
  acknowledged_by VARCHAR(100),

  -- Timestamps
  created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Indexes for common queries
CREATE INDEX IF NOT EXISTS idx_crawler_status_alerts_dispensary ON crawler_status_alerts(dispensary_id);
CREATE INDEX IF NOT EXISTS idx_crawler_status_alerts_type ON crawler_status_alerts(alert_type);
CREATE INDEX IF NOT EXISTS idx_crawler_status_alerts_severity ON crawler_status_alerts(severity);
CREATE INDEX IF NOT EXISTS idx_crawler_status_alerts_unack ON crawler_status_alerts(acknowledged) WHERE acknowledged = FALSE;
CREATE INDEX IF NOT EXISTS idx_crawler_status_alerts_created ON crawler_status_alerts(created_at DESC);

-- ============================================================
-- STATUS DEFINITIONS (for reference/validation)
-- ============================================================

COMMENT ON TABLE crawler_status_alerts IS 'Crawler status change notifications for dashboard alerting';
COMMENT ON COLUMN crawler_status_alerts.alert_type IS 'Type: status_change, crawl_error, validation_failed, promoted, demoted';
COMMENT ON COLUMN crawler_status_alerts.severity IS 'Severity: info, warning, error, critical';
COMMENT ON COLUMN crawler_status_alerts.previous_status IS 'Previous crawler status before change';
COMMENT ON COLUMN crawler_status_alerts.new_status IS 'New crawler status after change';

-- ============================================================
-- STATUS TRACKING ON PROFILES
-- ============================================================

-- Add columns for status tracking if not exists
DO $$
BEGIN
  -- Consecutive success count for auto-promotion
  IF NOT EXISTS (SELECT 1 FROM information_schema.columns
    WHERE table_name = 'dispensary_crawler_profiles' AND column_name = 'consecutive_successes') THEN
    ALTER TABLE dispensary_crawler_profiles ADD COLUMN consecutive_successes INTEGER DEFAULT 0;
  END IF;

  -- Consecutive failure count for auto-demotion
  IF NOT EXISTS (SELECT 1 FROM information_schema.columns
    WHERE table_name = 'dispensary_crawler_profiles' AND column_name = 'consecutive_failures') THEN
    ALTER TABLE dispensary_crawler_profiles ADD COLUMN consecutive_failures INTEGER DEFAULT 0;
  END IF;

  -- Last status change timestamp
  IF NOT EXISTS (SELECT 1 FROM information_schema.columns
    WHERE table_name = 'dispensary_crawler_profiles' AND column_name = 'status_changed_at') THEN
    ALTER TABLE dispensary_crawler_profiles ADD COLUMN status_changed_at TIMESTAMP WITH TIME ZONE;
  END IF;

  -- Status change reason
  IF NOT EXISTS (SELECT 1 FROM information_schema.columns
    WHERE table_name = 'dispensary_crawler_profiles' AND column_name = 'status_reason') THEN
    ALTER TABLE dispensary_crawler_profiles ADD COLUMN status_reason TEXT;
  END IF;
END $$;

-- ============================================================
-- VALID STATUS VALUES
-- ============================================================
-- Status values for dispensary_crawler_profiles.status:
--   'sandbox'      - Newly created, being validated
--   'production'   - Healthy, actively crawled
--   'needs_manual' - Requires human intervention
--   'failing'      - Multiple consecutive failures
--   'disabled'     - Manually disabled
--   'legacy'       - No profile, uses default method (virtual status)