/**
 * Unit tests for TeamService and Teams API
 */

import { describe, it, expect, beforeEach, afterEach } from 'bun:test'
import * as fs from 'node:fs/promises'
import * as path from 'node:path'
import * as os from 'node:os'
import { TeamService } from '../services/teamService.js'

// ============================================================================
// Test helpers
// ============================================================================

let tmpDir: string
let service: TeamService

async function setupTmpConfigDir(): Promise<string> {
  tmpDir = path.join(
    os.tmpdir(),
    `claude-teams-test-${Date.now()}-${Math.random().toString(36).slice(2)}`,
  )
  await fs.mkdir(path.join(tmpDir, 'teams'), { recursive: true })
  await fs.mkdir(path.join(tmpDir, 'projects'), { recursive: true })
  process.env.CLAUDE_CONFIG_DIR = tmpDir
  return tmpDir
}

async function cleanupTmpDir(): Promise<void> {
  if (tmpDir) {
    await fs.rm(tmpDir, { recursive: true, force: true })
  }
  delete process.env.CLAUDE_CONFIG_DIR
}

/** Write a team config.json to the temp directory. */
async function writeTeamConfig(
  teamName: string,
  config: Record<string, unknown>,
): Promise<string> {
  const teamDir = path.join(tmpDir, 'teams', teamName)
  await fs.mkdir(teamDir, { recursive: true })
  const configPath = path.join(teamDir, 'config.json')
  await fs.writeFile(configPath, JSON.stringify(config), 'utf-8')
  return configPath
}

/** Write a mock JSONL transcript file under projects. */
async function writeTranscriptFile(
  projectDir: string,
  sessionId: string,
  entries: Record<string, unknown>[],
): Promise<string> {
  const dir = path.join(tmpDir, 'projects', projectDir)
  await fs.mkdir(dir, { recursive: true })
  const filePath = path.join(dir, `${sessionId}.jsonl`)
  const content = entries.map((e) => JSON.stringify(e)).join('\n') + '\n'
  await fs.writeFile(filePath, content, 'utf-8')
  return filePath
}

async function writeSubagentTranscriptFile(
  projectDir: string,
  leadSessionId: string,
  fileName: string,
  entries: Record<string, unknown>[],
): Promise<string> {
  const dir = path.join(tmpDir, 'projects', projectDir, leadSessionId, 'subagents')
  await fs.mkdir(dir, { recursive: true })
  const filePath = path.join(dir, fileName)
  const content = entries.map((e) => JSON.stringify(e)).join('\n') + '\n'
  await fs.writeFile(filePath, content, 'utf-8')
  return filePath
}

/** Create a standard team config for testing. */
function makeTeamConfig(overrides?: Record<string, unknown>) {
  return {
    name: 'test-team',
    description: 'A test team',
    createdAt: 1700000000000,
    leadAgentId: 'agent-lead',
    members: [
      {
        agentId: 'agent-lead',
        name: 'Lead Agent',
        agentType: 'lead',
        model: 'claude-opus-4-7',
        color: '#ff0000',
        joinedAt: 1700000000000,
        tmuxPaneId: '%0',
        cwd: '/tmp/project',
        sessionId: 'session-lead-001',
        isActive: true,
      },
      {
        agentId: 'agent-worker',
        name: 'Worker Agent',
        agentType: 'worker',
        model: 'claude-sonnet-4-20250514',
        color: '#00ff00',
        joinedAt: 1700000001000,
        tmuxPaneId: '%1',
        cwd: '/tmp/project/src',
        sessionId: 'session-worker-001',
        isActive: false,
      },
    ],
    ...overrides,
  }
}

// ============================================================================
// TeamService tests
// ============================================================================

describe('TeamService', () => {
  beforeEach(async () => {
    await setupTmpConfigDir()
    service = new TeamService()
  })

  afterEach(async () => {
    await cleanupTmpDir()
  })

  // --------------------------------------------------------------------------
  // listTeams
  // --------------------------------------------------------------------------

  it('should return empty list when no teams exist', async () => {
    const teams = await service.listTeams()
    expect(teams).toEqual([])
  })

  it('should return empty list when teams directory does not exist', async () => {
    await fs.rm(path.join(tmpDir, 'teams'), { recursive: true, force: true })
    const teams = await service.listTeams()
    expect(teams).toEqual([])
  })

  it('should list teams from config files', async () => {
    await writeTeamConfig('alpha', makeTeamConfig({ name: 'alpha' }))
    await writeTeamConfig('beta', makeTeamConfig({ name: 'beta', description: 'Beta team' }))

    const teams = await service.listTeams()
    expect(teams).toHaveLength(2)

    const names = teams.map((t) => t.name).sort()
    expect(names).toEqual(['alpha', 'beta'])
  })

  it('should compute memberCount and activeMemberCount', async () => {
    await writeTeamConfig('gamma', makeTeamConfig({ name: 'gamma' }))

    const teams = await service.listTeams()
    expect(teams).toHaveLength(1)
    expect(teams[0]!.memberCount).toBe(2)
    expect(teams[0]!.activeMemberCount).toBe(1) // only lead is active
  })

  it('should skip malformed team directories', async () => {
    // Create a team dir with invalid JSON
    const badDir = path.join(tmpDir, 'teams', 'bad-team')
    await fs.mkdir(badDir, { recursive: true })
    await fs.writeFile(path.join(badDir, 'config.json'), 'not json', 'utf-8')

    // Also create a valid team
    await writeTeamConfig('good-team', makeTeamConfig({ name: 'good-team' }))

    const teams = await service.listTeams()
    expect(teams).toHaveLength(1)
    expect(teams[0]!.name).toBe('good-team')
  })

  // --------------------------------------------------------------------------
  // getTeam
  // --------------------------------------------------------------------------

  it('should return team detail with members', async () => {
    await writeTeamConfig(
      'detail-team',
      makeTeamConfig({
        name: 'detail-team',
        leadSessionId: 'lead-session-xyz',
      }),
    )

    const detail = await service.getTeam('detail-team')
    expect(detail.name).toBe('detail-team')
    expect(detail.leadAgentId).toBe('agent-lead')
    expect(detail.leadSessionId).toBe('lead-session-xyz')
    expect(detail.members).toHaveLength(2)
    expect(detail.members[0]!.agentId).toBe('agent-lead')
    expect(detail.members[1]!.agentId).toBe('agent-worker')
  })

  it('should discover missing in-process members from subagent transcripts', async () => {
    await writeTeamConfig(
      'subagent-team',
      makeTeamConfig({
        name: 'subagent-team',
        leadSessionId: 'lead-session-subagents',
        members: [
          {
            agentId: 'agent-lead',
            name: 'Lead Agent',
            agentType: 'lead',
            joinedAt: 1700000000000,
            tmuxPaneId: '%0',
            cwd: '/tmp/project',
            sessionId: 'session-lead-001',
            isActive: true,
          },
        ],
      }),
    )

    await writeSubagentTranscriptFile(
      '-tmp-project',
      'lead-session-subagents',
      'agent-1.jsonl',
      [
        {
          agentName: 'security-reviewer',
          agentId: 'security-reviewer@subagent-team',
          timestamp: '2026-01-01T00:00:00.000Z',
        },
      ],
    )

    const detail = await service.getTeam('subagent-team')
    expect(detail.members.some((member) => member.name === 'security-reviewer')).toBe(true)
  })

  it('should derive running status for active member', async () => {
    await writeTeamConfig('status-team', makeTeamConfig({ name: 'status-team' }))

    const detail = await service.getTeam('status-team')
    const lead = detail.members.find((m) => m.agentId === 'agent-lead')!
    expect(lead.status).toBe('running')
  })

  it('should derive idle status for inactive member', async () => {
    await writeTeamConfig('status-team', makeTeamConfig({ name: 'status-team' }))

    const detail = await service.getTeam('status-team')
    const worker = detail.members.find((m) => m.agentId === 'agent-worker')!
    expect(worker.status).toBe('idle')
  })

  it('should derive running status when isActive is undefined', async () => {
    const config = makeTeamConfig({ name: 'undef-team' })
    // Remove isActive from the first member to simulate undefined
    delete (config.members[0] as Record<string, unknown>).isActive
    await writeTeamConfig('undef-team', config)

    const detail = await service.getTeam('undef-team')
    const lead = detail.members.find((m) => m.agentId === 'agent-lead')!
    expect(lead.status).toBe('running')
  })

  it('should throw 404 for non-existent team', async () => {
    expect(service.getTeam('nonexistent')).rejects.toThrow('Team not found')
  })

  // --------------------------------------------------------------------------
  // getMemberTranscript
  // --------------------------------------------------------------------------

  it('should return transcript messages for a member', async () => {
    await writeTeamConfig('transcript-team', makeTeamConfig({ name: 'transcript-team' }))

    // Write a mock transcript JSONL for the lead session
    await writeTranscriptFile('-tmp-project', 'session-lead-001', [
      {
        type: 'file-history-snapshot',
        messageId: 'snap-1',
        snapshot: {},
      },
      {
        type: 'user',
        uuid: 'msg-user-1',
        message: { role: 'user', content: 'Hello team' },
        timestamp: '2026-01-01T00:01:00.000Z',
      },
      {
        type: 'assistant',
        uuid: 'msg-asst-1',
        message: {
          role: 'assistant',
          content: [{ type: 'text', text: 'Hi! Ready to help.' }],
        },
        timestamp: '2026-01-01T00:02:00.000Z',
      },
    ])

    const messages = await service.getMemberTranscript(
      'transcript-team',
      'agent-lead',
    )
    expect(messages).toHaveLength(2)
    expect(messages[0]!.type).toBe('user')
    expect(messages[0]!.id).toBe('msg-user-1')
    expect(messages[1]!.type).toBe('assistant')
  })

  it('should return empty array when member has no sessionId', async () => {
    const config = makeTeamConfig({ name: 'no-session-team' })
    delete (config.members[0] as Record<string, unknown>).sessionId
    await writeTeamConfig('no-session-team', config)

    const messages = await service.getMemberTranscript(
      'no-session-team',
      'agent-lead',
    )
    expect(messages).toEqual([])
  })

  it('should return empty array when transcript file not found', async () => {
    await writeTeamConfig('no-file-team', makeTeamConfig({ name: 'no-file-team' }))

    // Don't write any transcript file
    const messages = await service.getMemberTranscript(
      'no-file-team',
      'agent-lead',
    )
    expect(messages).toEqual([])
  })

  it('should throw 404 for unknown member', async () => {
    await writeTeamConfig('member-team', makeTeamConfig({ name: 'member-team' }))

    expect(
      service.getMemberTranscript('member-team', 'nonexistent-agent'),
    ).rejects.toThrow('Team member not found')
  })

  it('should skip meta entries in transcript', async () => {
    await writeTeamConfig('meta-team', makeTeamConfig({ name: 'meta-team' }))

    await writeTranscriptFile('-tmp-project', 'session-lead-001', [
      {
        type: 'user',
        uuid: 'msg-meta',
        message: { role: 'user', content: 'internal meta' },
        isMeta: true,
        timestamp: '2026-01-01T00:00:30.000Z',
      },
      {
        type: 'user',
        uuid: 'msg-real',
        message: { role: 'user', content: 'Real message' },
        timestamp: '2026-01-01T00:01:00.000Z',
      },
    ])

    const messages = await service.getMemberTranscript('meta-team', 'agent-lead')
    expect(messages).toHaveLength(1)
    expect(messages[0]!.id).toBe('msg-real')
  })

  // --------------------------------------------------------------------------
  // sendMemberMessage
  // --------------------------------------------------------------------------

  it('should write member messages into the teammate inbox', async () => {
    await writeTeamConfig('mailbox-team', makeTeamConfig({ name: 'mailbox-team' }))

    await service.sendMemberMessage(
      'mailbox-team',
      'agent-worker',
      'Please review the latest diff',
    )

    const inboxPath = path.join(
      tmpDir,
      'teams',
      'mailbox-team',
      'inboxes',
      'Worker-Agent.json',
    )
    const rawInbox = await fs.readFile(inboxPath, 'utf-8')
    const inbox = JSON.parse(rawInbox) as Array<{
      from: string
      text: string
      read: boolean
    }>

    expect(inbox).toHaveLength(1)
    expect(inbox[0]).toMatchObject({
      from: 'user',
      text: 'Please review the latest diff',
      read: false,
    })
  })

  it('should send messages to inbox-discovered members', async () => {
    await writeTeamConfig('inbox-team', makeTeamConfig({ name: 'inbox-team' }))
    const inboxDir = path.join(tmpDir, 'teams', 'inbox-team', 'inboxes')
    await fs.mkdir(inboxDir, { recursive: true })
    await fs.writeFile(path.join(inboxDir, 'security-reviewer.json'), '[]', 'utf-8')

    await service.sendMemberMessage(
      'inbox-team',
      'security-reviewer@inbox-team',
      'Check the auth changes',
    )

    const rawInbox = await fs.readFile(
      path.join(inboxDir, 'security-reviewer.json'),
      'utf-8',
    )
    const inbox = JSON.parse(rawInbox) as Array<{ text: string }>
    expect(inbox.at(-1)?.text).toBe('Check the auth changes')
  })

  // --------------------------------------------------------------------------
  // deleteTeam
  // --------------------------------------------------------------------------

  it('should delete a team with no active members', async () => {
    const config = makeTeamConfig({ name: 'deletable' })
    // Set all members to inactive
    for (const member of config.members) {
      ;(member as Record<string, unknown>).isActive = false
    }
    await writeTeamConfig('deletable', config)

    await service.deleteTeam('deletable')

    // Team dir should be gone
    const teamDir = path.join(tmpDir, 'teams', 'deletable')
    expect(fs.access(teamDir)).rejects.toThrow()
  })

  it('should refuse to delete a team with active members', async () => {
    await writeTeamConfig('active-team', makeTeamConfig({ name: 'active-team' }))

    expect(service.deleteTeam('active-team')).rejects.toThrow(
      'has active members',
    )
  })

  it('should throw 404 when deleting non-existent team', async () => {
    expect(service.deleteTeam('ghost')).rejects.toThrow('Team not found')
  })
})

// ============================================================================
// Teams API integration tests
// ============================================================================

describe('Teams API', () => {
  let baseUrl: string
  let server: ReturnType<typeof Bun.serve> | null = null

  beforeEach(async () => {
    await setupTmpConfigDir()
    service = new TeamService()

    const { handleTeamsApi } = await import('../api/teams.js')

    server = Bun.serve({
      port: 0,
      hostname: '127.0.0.1',

      async fetch(req) {
        const url = new URL(req.url)
        const segments = url.pathname.split('/').filter(Boolean)

        if (segments[0] === 'api' && segments[1] === 'teams') {
          return handleTeamsApi(req, url, segments)
        }

        return new Response('Not Found', { status: 404 })
      },
    })
    baseUrl = `http://127.0.0.1:${server.port}`
  })

  afterEach(async () => {
    if (server) {
      server.stop(true)
      server = null
    }
    await cleanupTmpDir()
  })

  it('GET /api/teams should return empty list', async () => {
    const res = await fetch(`${baseUrl}/api/teams`)
    expect(res.status).toBe(200)

    const body = (await res.json()) as { teams: unknown[] }
    expect(body.teams).toEqual([])
  })

  it('GET /api/teams should list teams', async () => {
    await writeTeamConfig('api-team', makeTeamConfig({ name: 'api-team' }))

    const res = await fetch(`${baseUrl}/api/teams`)
    expect(res.status).toBe(200)

    const body = (await res.json()) as { teams: Array<{ name: string }> }
    expect(body.teams).toHaveLength(1)
    expect(body.teams[0]!.name).toBe('api-team')
  })

  it('GET /api/teams/:name should return team detail', async () => {
    await writeTeamConfig(
      'detail',
      makeTeamConfig({ name: 'detail', leadSessionId: 'leader-session-id' }),
    )

    const res = await fetch(`${baseUrl}/api/teams/detail`)
    expect(res.status).toBe(200)

    const body = (await res.json()) as {
      name: string
      leadAgentId: string
      leadSessionId?: string
      members: Array<{ agentId: string }>
    }
    expect(body.name).toBe('detail')
    expect(body.leadAgentId).toBe('agent-lead')
    expect(body.leadSessionId).toBe('leader-session-id')
    expect(body.members).toHaveLength(2)
  })

  it('GET /api/teams/:name should 404 for unknown team', async () => {
    const res = await fetch(`${baseUrl}/api/teams/nonexistent`)
    expect(res.status).toBe(404)
  })

  it('GET /api/teams/:name/members/:id/transcript should return messages', async () => {
    await writeTeamConfig('t-team', makeTeamConfig({ name: 't-team' }))

    await writeTranscriptFile('-tmp-project', 'session-lead-001', [
      {
        type: 'user',
        uuid: 'u1',
        message: { role: 'user', content: 'Hello' },
        timestamp: '2026-01-01T00:01:00.000Z',
      },
    ])

    const res = await fetch(
      `${baseUrl}/api/teams/t-team/members/agent-lead/transcript`,
    )
    expect(res.status).toBe(200)

    const body = (await res.json()) as {
      messages: Array<{ id: string; type: string }>
    }
    expect(body.messages).toHaveLength(1)
    expect(body.messages[0]!.type).toBe('user')
  })

  it('GET /api/teams/:name/members/:id/transcript should 404 for unknown member', async () => {
    await writeTeamConfig('t2-team', makeTeamConfig({ name: 't2-team' }))

    const res = await fetch(
      `${baseUrl}/api/teams/t2-team/members/unknown-agent/transcript`,
    )
    expect(res.status).toBe(404)
  })

  it('POST /api/teams/:name/members/:id/messages should enqueue a mailbox message', async () => {
    await writeTeamConfig('send-team', makeTeamConfig({ name: 'send-team' }))

    const res = await fetch(
      `${baseUrl}/api/teams/send-team/members/agent-worker/messages`,
      {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ content: 'Please continue with the failing test' }),
      },
    )

    expect(res.status).toBe(200)
    const body = (await res.json()) as { ok: boolean }
    expect(body.ok).toBe(true)

    const rawInbox = await fs.readFile(
      path.join(tmpDir, 'teams', 'send-team', 'inboxes', 'Worker-Agent.json'),
      'utf-8',
    )
    const inbox = JSON.parse(rawInbox) as Array<{ text: string }>
    expect(inbox.at(-1)?.text).toBe('Please continue with the failing test')
  })

  it('DELETE /api/teams/:name should delete team', async () => {
    const config = makeTeamConfig({ name: 'del-team' })
    for (const member of (config as { members: Array<Record<string, unknown>> }).members) {
      member.isActive = false
    }
    await writeTeamConfig('del-team', config)

    const res = await fetch(`${baseUrl}/api/teams/del-team`, {
      method: 'DELETE',
    })
    expect(res.status).toBe(200)

    const body = (await res.json()) as { ok: boolean }
    expect(body.ok).toBe(true)

    // Verify it's gone
    const res2 = await fetch(`${baseUrl}/api/teams/del-team`)
    expect(res2.status).toBe(404)
  })

  it('DELETE /api/teams/:name should 409 when team has active members', async () => {
    await writeTeamConfig('active', makeTeamConfig({ name: 'active' }))

    const res = await fetch(`${baseUrl}/api/teams/active`, {
      method: 'DELETE',
    })
    expect(res.status).toBe(409)
  })

  it('POST /api/teams should return 405', async () => {
    const res = await fetch(`${baseUrl}/api/teams`, { method: 'POST' })
    expect(res.status).toBe(405)
  })
})