All files / src/app/api/dev/metrics/dashboard route.ts

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export const dynamic = "force-dynamic";

/**
 * Dev Dashboard Metrics API
 * GET /api/dev/metrics/dashboard - Get dashboard statistics
 */

import { NextRequest, NextResponse } from 'next/server';
import { } from 'next-auth';
import {
  withAdmin,
  withErrorHandling,
  successResponse,
  ApiSuccessResponse,
  ApiErrorResponse
} from '@/lib/api';
import { } from '@/lib/api/middleware';
import { prisma } from '@/lib/prisma';

async function handleGet(
  request: NextRequest
): Promise<NextResponse<ApiSuccessResponse<unknown> | ApiErrorResponse>> {

  const { searchParams } = new URL(request.url);
  const projectId = searchParams.get('projectId');

  const now = new Date();
  const weekAgo = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
  const monthAgo = new Date(now.getTime() - 30 * 24 * 60 * 60 * 1000);

  // Build where clause for project filtering
  const ticketWhere = projectId ? { projectId } : {};

  // Execute all queries in parallel
  const [
    // Overall counts
    totalTickets,
    openTickets,
    inProgressTickets,
    inReviewTickets,
    testingTickets,
    blockedTickets,
    completedThisWeek,
    createdThisWeek,
    overdueTickets,
    unassignedTickets,
    // Group by queries
    statusCounts,
    typeCounts,
    priorityCounts,
    severityCounts,
    // Project & Sprint stats
    projectStats,
    activeSprintsCount,
    // Recent activity
    recentlyCompleted,
    recentlyCreated,
    // Time tracking
    hoursLoggedThisWeek,
    // Assignee workload
    assigneeWorkload,
  ] = await Promise.all([
    // Total tickets
    prisma.devTicket.count({ where: ticketWhere }),
    // Open tickets
    prisma.devTicket.count({ where: { ...ticketWhere, status: 'OPEN' } }),
    // In progress
    prisma.devTicket.count({ where: { ...ticketWhere, status: 'IN_PROGRESS' } }),
    // In review
    prisma.devTicket.count({ where: { ...ticketWhere, status: 'IN_REVIEW' } }),
    // Testing
    prisma.devTicket.count({ where: { ...ticketWhere, status: 'TESTING' } }),
    // Blocked
    prisma.devTicket.count({ where: { ...ticketWhere, status: 'BLOCKED' } }),
    // Completed this week
    prisma.devTicket.count({
      where: {
        ...ticketWhere,
        status: 'COMPLETED',
        completedAt: { gte: weekAgo }
      }
    }),
    // Created this week
    prisma.devTicket.count({
      where: {
        ...ticketWhere,
        createdAt: { gte: weekAgo }
      }
    }),
    // Overdue
    prisma.devTicket.count({
      where: {
        ...ticketWhere,
        dueDate: { lt: now },
        status: { notIn: ['COMPLETED', 'CANCELLED', 'WONT_FIX'] }
      }
    }),
    // Unassigned (active)
    prisma.devTicket.count({
      where: {
        ...ticketWhere,
        assigneeId: null,
        status: { in: ['OPEN', 'IN_PROGRESS'] }
      }
    }),
    // Status breakdown
    prisma.devTicket.groupBy({
      by: ['status'],
      where: ticketWhere,
      _count: true
    }),
    // Type breakdown
    prisma.devTicket.groupBy({
      by: ['type'],
      where: ticketWhere,
      _count: true
    }),
    // Priority breakdown
    prisma.devTicket.groupBy({
      by: ['priority'],
      where: ticketWhere,
      _count: true
    }),
    // Severity breakdown (bugs only)
    prisma.devTicket.groupBy({
      by: ['severity'],
      where: { ...ticketWhere, type: 'BUG', severity: { not: null } },
      _count: true
    }),
    // Project ticket counts
    prisma.devProject.findMany({
      where: { isActive: true },
      select: {
        id: true,
        name: true,
        key: true,
        color: true,
        _count: {
          select: { tickets: true }
        }
      }
    }),
    // Active sprints
    prisma.devSprint.count({ where: { status: 'ACTIVE' } }),
    // Recently completed tickets
    prisma.devTicket.findMany({
      where: {
        ...ticketWhere,
        status: 'COMPLETED',
        completedAt: { gte: monthAgo }
      },
      select: {
        id: true,
        ticketNumber: true,
        title: true,
        type: true,
        completedAt: true,
        assignee: {
          select: { id: true, name: true, image: true }
        }
      },
      orderBy: { completedAt: 'desc' },
      take: 10
    }),
    // Recently created tickets
    prisma.devTicket.findMany({
      where: {
        ...ticketWhere,
        createdAt: { gte: weekAgo }
      },
      select: {
        id: true,
        ticketNumber: true,
        title: true,
        type: true,
        priority: true,
        createdAt: true,
        reporter: {
          select: { id: true, name: true, image: true }
        }
      },
      orderBy: { createdAt: 'desc' },
      take: 10
    }),
    // Hours logged this week
    prisma.devTimeEntry.aggregate({
      where: {
        date: { gte: weekAgo },
        ...(projectId ? { ticket: { projectId } } : {})
      },
      _sum: { hours: true }
    }),
    // Assignee workload (tickets per person)
    prisma.devTicket.groupBy({
      by: ['assigneeId'],
      where: {
        ...ticketWhere,
        assigneeId: { not: null },
        status: { in: ['OPEN', 'IN_PROGRESS', 'IN_REVIEW', 'TESTING', 'BLOCKED'] }
      },
      _count: true,
      _sum: { storyPoints: true }
    }),
  ]);

  // Get assignee details for workload
  const assigneeIds = assigneeWorkload
    .map((w) => w.assigneeId)
    .filter((id): id is number => id !== null);

  const assignees =
    assigneeIds.length > 0
      ? await prisma.user.findMany({
        where: { id: { in: assigneeIds } },
        select: { id: true, name: true, email: true, image: true }
      })
      : [];

  const assigneeMap = new Map(assignees.map((a) => [a.id, a]));

  // Transform results
  const byStatus = Object.fromEntries(statusCounts.map((s) => [s.status, s._count]));
  const byType = Object.fromEntries(typeCounts.map((t) => [t.type, t._count]));
  const byPriority = Object.fromEntries(priorityCounts.map((p) => [p.priority, p._count]));
  const bySeverity = Object.fromEntries(
    severityCounts.map((s) => [s.severity, s._count])
  );

  const workloadByAssignee = assigneeWorkload.map((w) => ({
    assignee: w.assigneeId ? assigneeMap.get(w.assigneeId) : null,
    ticketCount: w._count,
    storyPoints: w._sum.storyPoints || 0
  }));

  const projectTicketCounts = projectStats.map((p) => ({
    id: p.id,
    name: p.name,
    key: p.key,
    color: p.color,
    ticketCount: p._count.tickets
  }));

  return successResponse({
    overview: {
      totalTickets,
      openTickets,
      inProgressTickets,
      inReviewTickets,
      testingTickets,
      blockedTickets,
      completedThisWeek,
      createdThisWeek,
      overdueTickets,
      unassignedTickets,
      activeSprintsCount,
      hoursLoggedThisWeek: hoursLoggedThisWeek._sum.hours || 0
    },
    breakdown: {
      byStatus,
      byType,
      byPriority,
      bySeverity
    },
    projects: projectTicketCounts,
    workload: workloadByAssignee,
    recentActivity: {
      completed: recentlyCompleted,
      created: recentlyCreated
    }
  });
}

export const GET = withErrorHandling(withAdmin(handleGet));