'use server';

import { sew, withAuth, withOrgMembership } from "@/actions";
import { OrgRole } from "@sourcebot/db";
import { prisma } from "@/prisma";
import { ServiceError } from "@/lib/serviceError";
import { AnalyticsResponse } from "./types";
import { hasEntitlement } from "@sourcebot/shared";
import { ErrorCode } from "@/lib/errorCodes";
import { StatusCodes } from "http-status-codes";

export const getAnalytics = async (domain: string, apiKey: string | undefined = undefined): Promise<AnalyticsResponse | ServiceError> => sew(() =>
  withAuth((userId, _apiKeyHash) =>
    withOrgMembership(userId, domain, async ({ org }) => {
      if (!hasEntitlement("analytics")) {
        return {
          statusCode: StatusCodes.FORBIDDEN,
          errorCode: ErrorCode.INSUFFICIENT_PERMISSIONS,
          message: "Analytics is not available in your current plan",
        } satisfies ServiceError;
      }

      const rows = await prisma.$queryRaw<AnalyticsResponse>`
      WITH core AS (
        SELECT
          date_trunc('day',   "timestamp") AS day,
          date_trunc('week',  "timestamp") AS week,
          date_trunc('month', "timestamp") AS month,
          action,
          "actorId"
        FROM "Audit"
        WHERE "orgId" = ${org.id}
          AND action IN (
            'user.performed_code_search',
            'user.performed_find_references',
            'user.performed_goto_definition'
          )
      ),
    
      periods AS (
        SELECT unnest(array['day', 'week', 'month']) AS period
      ),
    
      buckets AS (
        SELECT
          generate_series(
            date_trunc('day',   (SELECT MIN("timestamp") FROM "Audit" WHERE "orgId" = ${org.id})),
            date_trunc('day',   CURRENT_DATE),
            interval '1 day'
          ) AS bucket,
          'day' AS period
        UNION ALL
        SELECT
          generate_series(
            date_trunc('week',  (SELECT MIN("timestamp") FROM "Audit" WHERE "orgId" = ${org.id})),
            date_trunc('week',  CURRENT_DATE),
            interval '1 week'
          ),
          'week'
        UNION ALL
        SELECT
          generate_series(
            date_trunc('month', (SELECT MIN("timestamp") FROM "Audit" WHERE "orgId" = ${org.id})),
            date_trunc('month', CURRENT_DATE),
            interval '1 month'
          ),
          'month'
      ),
    
      aggregated AS (
        SELECT
          b.period,
          CASE b.period
            WHEN 'day'   THEN c.day
            WHEN 'week'  THEN c.week
            ELSE              c.month
          END AS bucket,
          COUNT(*) FILTER (WHERE c.action = 'user.performed_code_search') AS code_searches,
          COUNT(*) FILTER (WHERE c.action IN ('user.performed_find_references', 'user.performed_goto_definition')) AS navigations,
          COUNT(DISTINCT c."actorId") AS active_users
        FROM core c
        JOIN LATERAL (
          SELECT unnest(array['day', 'week', 'month']) AS period
        ) b ON true
        GROUP BY b.period, bucket
      )
    
      SELECT
        b.period,
        b.bucket,
        COALESCE(a.code_searches, 0)::int AS code_searches,
        COALESCE(a.navigations, 0)::int AS navigations,
        COALESCE(a.active_users, 0)::int AS active_users
      FROM buckets b
      LEFT JOIN aggregated a
        ON a.period = b.period AND a.bucket = b.bucket
      ORDER BY b.period, b.bucket;
    `;
    

      return rows;
    }, /* minRequiredRole = */ OrgRole.MEMBER), /* allowAnonymousAccess = */ true, apiKey ? { apiKey, domain } : undefined)
);