import { describe, it, expect, vi, beforeEach } from 'vitest'

const { mockQueryRaw } = vi.hoisted(() => ({ mockQueryRaw: vi.fn() }))

vi.mock('@/lib/prisma', () => ({
  prisma: { $queryRaw: mockQueryRaw },
}))

import { getJobsPerDay } from '@/lib/insights/agent-throughput'

// Build a date string for N days ago (UTC)
function daysAgo(n: number): Date {
  const d = new Date()
  d.setUTCDate(d.getUTCDate() - n)
  return d
}

function toUTCDate(d: Date): Date {
  return new Date(Date.UTC(d.getUTCFullYear(), d.getUTCMonth(), d.getUTCDate()))
}

beforeEach(() => {
  vi.clearAllMocks()
})

describe('getJobsPerDay', () => {
  it('returns a 14-day array zero-filled for missing days', async () => {
    // Only 3 days have data; the rest should be 0
    const day0 = toUTCDate(daysAgo(0))
    const day3 = toUTCDate(daysAgo(3))
    const day7 = toUTCDate(daysAgo(7))

    const dayRows = [
      { day: day0, status: 'done', count: BigInt(2) },
      { day: day3, status: 'failed', count: BigInt(1) },
      { day: day7, status: 'done', count: BigInt(5) },
    ]

    const kpiRows = [
      { today_count: BigInt(2), done_7d: BigInt(7), terminal_7d: BigInt(10), avg_seconds: 120 },
    ]

    mockQueryRaw.mockResolvedValueOnce(dayRows).mockResolvedValueOnce(kpiRows)

    const result = await getJobsPerDay('user-1')

    expect(result.perDay).toHaveLength(14)

    // All days should have zero counts except the three we seeded
    const nonZero = result.perDay.filter(
      d => d.done + d.failed + d.queued + d.claimed + d.running + d.cancelled + d.skipped > 0,
    )
    expect(nonZero).toHaveLength(3)

    // Today's done count should be 2
    const today = result.perDay[result.perDay.length - 1]
    expect(today.done).toBe(2)
  })

  it('calculates KPIs correctly', async () => {
    mockQueryRaw.mockResolvedValueOnce([]).mockResolvedValueOnce([
      { today_count: BigInt(3), done_7d: BigInt(7), terminal_7d: BigInt(10), avg_seconds: 90 },
    ])

    const result = await getJobsPerDay('user-1')

    expect(result.kpi.todayCount).toBe(3)
    expect(result.kpi.successRate7d).toBe(0.7)
    expect(result.kpi.avgDurationSeconds7d).toBe(90)
  })

  it('returns zero successRate and null avgDuration when no terminal jobs', async () => {
    mockQueryRaw.mockResolvedValueOnce([]).mockResolvedValueOnce([
      { today_count: BigInt(0), done_7d: BigInt(0), terminal_7d: BigInt(0), avg_seconds: null },
    ])

    const result = await getJobsPerDay('user-1')

    expect(result.kpi.successRate7d).toBe(0)
    expect(result.kpi.avgDurationSeconds7d).toBeNull()
  })
})
