-- Create view for grouped alerts to reduce alert fatigue
CREATE OR REPLACE VIEW grouped_alerts_view AS
WITH system_alerts_grouped AS (
  SELECT
    alert_type AS group_key,
    alert_type,
    severity,
    'system'::text AS source,
    NULL::text AS function_name,
    NULL::text AS metric_type,
    COUNT(*) AS alert_count,
    MIN(created_at) AS first_seen,
    MAX(created_at) AS last_seen,
    ARRAY_AGG(id::text ORDER BY created_at DESC) AS alert_ids,
    ARRAY_AGG(message ORDER BY created_at DESC) AS messages,
    BOOL_OR(resolved_at IS NOT NULL) AS has_resolved,
    COUNT(*) FILTER (WHERE resolved_at IS NULL) AS unresolved_count
  FROM system_alerts
  WHERE created_at > NOW() - INTERVAL '7 days'
  GROUP BY alert_type, severity
),
rate_limit_alerts_grouped AS (
  SELECT
    CONCAT(metric_type, ':', COALESCE(function_name, 'global')) AS group_key,
    NULL::text AS alert_type,
    'high'::text AS severity,
    'rate_limit'::text AS source,
    function_name,
    metric_type,
    COUNT(*) AS alert_count,
    MIN(created_at) AS first_seen,
    MAX(created_at) AS last_seen,
    ARRAY_AGG(id::text ORDER BY created_at DESC) AS alert_ids,
    ARRAY_AGG(alert_message ORDER BY created_at DESC) AS messages,
    BOOL_OR(resolved_at IS NOT NULL) AS has_resolved,
    COUNT(*) FILTER (WHERE resolved_at IS NULL) AS unresolved_count
  FROM rate_limit_alerts
  WHERE created_at > NOW() - INTERVAL '7 days'
  GROUP BY metric_type, function_name
)
SELECT * FROM system_alerts_grouped
UNION ALL
SELECT * FROM rate_limit_alerts_grouped;

-- Grant access to authenticated users
GRANT SELECT ON grouped_alerts_view TO authenticated;

-- Create indexes for better performance
CREATE INDEX IF NOT EXISTS idx_system_alerts_grouping 
  ON system_alerts(alert_type, severity, created_at DESC) 
  WHERE resolved_at IS NULL;

CREATE INDEX IF NOT EXISTS idx_rate_limit_alerts_grouping 
  ON rate_limit_alerts(metric_type, function_name, created_at DESC) 
  WHERE resolved_at IS NULL;