-- name: CreateKolUsageLog :one
INSERT INTO kol_usage_logs (tenant_id, subscription_id, subscription_prompt_id,
                            package_id, prompt_id, prompt_revision_no,
                            generation_task_id, status, variables_snapshot,
                            schema_snapshot, rendered_prompt_hash)
VALUES (sqlc.arg(tenant_id)::bigint, sqlc.arg(subscription_id),
        sqlc.arg(subscription_prompt_id), sqlc.arg(package_id),
        sqlc.arg(prompt_id), sqlc.arg(prompt_revision_no),
        sqlc.arg(generation_task_id), 'pending',
        sqlc.arg(variables_snapshot)::jsonb, sqlc.arg(schema_snapshot)::jsonb,
        sqlc.arg(rendered_prompt_hash))
RETURNING id, tenant_id, generation_task_id, status, created_at;

-- name: MarkKolUsageCompleted :exec
UPDATE kol_usage_logs
SET status = 'completed', article_id = sqlc.arg(article_id),
    finished_at = NOW()
WHERE id = sqlc.arg(id)
  AND tenant_id = sqlc.arg(tenant_id)::bigint;

-- name: MarkKolUsageFailed :exec
UPDATE kol_usage_logs
SET status = 'failed', error_message = sqlc.arg(error_message),
    finished_at = NOW()
WHERE id = sqlc.arg(id)
  AND tenant_id = sqlc.arg(tenant_id)::bigint;

-- name: MarkKolUsageCompletedByTask :exec
UPDATE kol_usage_logs
SET status = 'completed', article_id = sqlc.arg(article_id), finished_at = NOW()
WHERE generation_task_id = sqlc.arg(generation_task_id)
  AND tenant_id = sqlc.arg(tenant_id)::bigint;

-- name: MarkKolUsageFailedByTask :exec
UPDATE kol_usage_logs
SET status = 'failed', error_message = sqlc.arg(error_message), finished_at = NOW()
WHERE generation_task_id = sqlc.arg(generation_task_id)
  AND tenant_id = sqlc.arg(tenant_id)::bigint;

-- name: GetKolUsageByGenerationTask :one
SELECT id, tenant_id, package_id, prompt_id, status, created_at
FROM kol_usage_logs
WHERE generation_task_id = sqlc.arg(generation_task_id)
  AND tenant_id = sqlc.arg(tenant_id)::bigint;

-- name: KolDashboardOverview :one
-- Cross-tenant aggregation: KOL owns packages across subscriber tenants.
SELECT
  (SELECT COUNT(DISTINCT s.tenant_id) FROM kol_subscriptions s
     WHERE s.package_id = ANY(sqlc.arg(package_ids)::bigint[]) AND s.status='active'
       AND (s.end_at IS NULL OR s.end_at > NOW())) AS total_subs,
  (SELECT COUNT(*) FROM kol_subscriptions s
     WHERE s.package_id = ANY(sqlc.arg(package_ids)::bigint[])
       AND s.status='active'
       AND s.created_at >= date_trunc('month', NOW())) AS month_subs,
  (SELECT COUNT(*) FROM kol_usage_logs u
     WHERE u.package_id = ANY(sqlc.arg(package_ids)::bigint[])) AS total_usage,
  (SELECT COUNT(*) FROM kol_usage_logs u
     WHERE u.package_id = ANY(sqlc.arg(package_ids)::bigint[])
       AND u.created_at >= date_trunc('month', NOW())) AS month_usage,
  (SELECT COUNT(*) FROM kol_usage_logs u
     WHERE u.package_id = ANY(sqlc.arg(package_ids)::bigint[])
       AND u.status='failed') AS failure_count;

-- name: KolDashboardTrend :many
-- Returns a per-day series combining usage count and new subscription count for KOL dashboard.
WITH days AS (
    SELECT generate_series(
        date_trunc('day', NOW()) - (sqlc.arg(period_days)::int - 1) * INTERVAL '1 day',
        date_trunc('day', NOW()),
        INTERVAL '1 day'
    )::date AS d
),
u AS (
    SELECT date_trunc('day', created_at)::date AS d,
           COUNT(*) FILTER (WHERE status = 'completed') AS usages
    FROM kol_usage_logs
    WHERE package_id = ANY(sqlc.arg(package_ids)::bigint[])
      AND created_at >= NOW() - sqlc.arg(period_days)::int * INTERVAL '1 day'
    GROUP BY 1
),
s AS (
    SELECT date_trunc('day', created_at)::date AS d,
           COUNT(*) AS subscriptions
    FROM kol_subscriptions
    WHERE package_id = ANY(sqlc.arg(package_ids)::bigint[])
      AND status IN ('active', 'expired', 'revoked')
      AND created_at >= NOW() - sqlc.arg(period_days)::int * INTERVAL '1 day'
    GROUP BY 1
)
SELECT days.d,
       COALESCE(u.usages, 0)::bigint AS usages,
       COALESCE(s.subscriptions, 0)::bigint AS subscriptions
FROM days
LEFT JOIN u ON u.d = days.d
LEFT JOIN s ON s.d = days.d
ORDER BY days.d ASC;

-- name: KolUsageCountByPackage :many
-- Cross-tenant aggregation for KOL dashboard.
SELECT package_id, COUNT(*) AS total,
       SUM(CASE WHEN status = 'completed' THEN 1 ELSE 0 END) AS completed,
       SUM(CASE WHEN status = 'failed' THEN 1 ELSE 0 END) AS failed
FROM kol_usage_logs
WHERE package_id = ANY(sqlc.arg(package_ids)::bigint[])
GROUP BY package_id;