import { afterEach, beforeEach, describe, expect, it } from 'bun:test'
import * as fs from 'node:fs/promises'
import * as os from 'node:os'
import * as path from 'node:path'
import type { AppState } from '../../state/AppStateStore.js'
import { isEnabledPluginSettingValue } from '../../utils/plugins/dependencyResolver.js'
import { clearInstalledPluginsCache } from '../../utils/plugins/installedPluginsManager.js'
import { clearPluginCache, loadAllPluginsCacheOnly } from '../../utils/plugins/pluginLoader.js'
import { refreshActivePlugins } from '../../utils/plugins/refresh.js'
import { resetSettingsCache } from '../../utils/settings/settingsCache.js'
import { handlePluginsApi } from '../api/plugins.js'
import { conversationService } from '../services/conversationService.js'
import { __resetWebSocketHandlerStateForTests, getSlashCommands } from '../ws/handler.js'

let tmpDir: string
let originalConfigDir: string | undefined
let originalHasSession: typeof conversationService.hasSession
let originalRequestControl: typeof conversationService.requestControl

function makeRequest(
  method: string,
  urlStr: string,
  body?: Record<string, unknown>,
): { req: Request; url: URL; segments: string[] } {
  const url = new URL(urlStr, 'http://localhost:3456')
  const init: RequestInit = { method }
  if (body) {
    init.headers = { 'Content-Type': 'application/json' }
    init.body = JSON.stringify(body)
  }
  const req = new Request(url.toString(), init)
  return {
    req,
    url,
    segments: url.pathname.split('/').filter(Boolean),
  }
}

describe('Plugins API', () => {
  beforeEach(async () => {
    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'claude-plugins-api-'))
    originalConfigDir = process.env.CLAUDE_CONFIG_DIR
    process.env.CLAUDE_CONFIG_DIR = tmpDir
    clearInstalledPluginsCache()
    clearPluginCache('plugins-api-test-setup')
    resetSettingsCache()
    __resetWebSocketHandlerStateForTests()
    originalHasSession = conversationService.hasSession.bind(conversationService)
    originalRequestControl = conversationService.requestControl.bind(conversationService)
  })

  afterEach(async () => {
    conversationService.hasSession = originalHasSession
    conversationService.requestControl = originalRequestControl
    __resetWebSocketHandlerStateForTests()
    clearInstalledPluginsCache()
    clearPluginCache('plugins-api-test-teardown')
    resetSettingsCache()
    if (originalConfigDir === undefined) {
      delete process.env.CLAUDE_CONFIG_DIR
    } else {
      process.env.CLAUDE_CONFIG_DIR = originalConfigDir
    }
    await fs.rm(tmpDir, { recursive: true, force: true })
  })

  it('GET /api/plugins returns an empty plugin list for a clean config', async () => {
    const { req, url, segments } = makeRequest('GET', '/api/plugins')
    const res = await handlePluginsApi(req, url, segments)

    expect(res.status).toBe(200)
    const body = await res.json() as {
      plugins: unknown[]
      marketplaces: unknown[]
      summary: { total: number; enabled: number; errorCount: number }
    }

    expect(body.plugins).toEqual([])
    expect(Array.isArray(body.marketplaces)).toBe(true)
    expect(body.summary.total).toBe(0)
    expect(body.summary.enabled).toBe(0)
    expect(body.summary.errorCount).toBe(0)
  })

  it('treats enabledPlugins version constraint arrays as enabled plugins', async () => {
    const marketplaceRoot = path.join(tmpDir, 'marketplace-root')
    const pluginRoot = path.join(marketplaceRoot, 'plugins', 'demo')
    const pluginsDir = path.join(tmpDir, 'plugins')
    const marketplaceFile = path.join(marketplaceRoot, '.claude-plugin', 'marketplace.json')

    await fs.mkdir(path.join(pluginRoot, '.claude-plugin'), { recursive: true })
    await fs.mkdir(path.dirname(marketplaceFile), { recursive: true })
    await fs.mkdir(pluginsDir, { recursive: true })

    await fs.writeFile(
      path.join(pluginRoot, '.claude-plugin', 'plugin.json'),
      JSON.stringify({
        name: 'demo',
        version: '1.0.0',
        description: 'Demo plugin',
      }),
      'utf-8',
    )
    await fs.writeFile(
      marketplaceFile,
      JSON.stringify({
        name: 'test-market',
        owner: { name: 'Test' },
        plugins: [
          {
            name: 'demo',
            source: './plugins/demo',
            version: '1.0.0',
          },
        ],
      }),
      'utf-8',
    )
    await fs.writeFile(
      path.join(pluginsDir, 'known_marketplaces.json'),
      JSON.stringify({
        'test-market': {
          source: { source: 'directory', path: marketplaceRoot },
          installLocation: marketplaceRoot,
          lastUpdated: new Date(0).toISOString(),
        },
      }),
      'utf-8',
    )
    await fs.writeFile(
      path.join(tmpDir, 'settings.json'),
      JSON.stringify({
        enabledPlugins: {
          'demo@test-market': ['^1.0.0'],
        },
      }),
      'utf-8',
    )

    expect(isEnabledPluginSettingValue(true)).toBe(true)
    expect(isEnabledPluginSettingValue(['^1.0.0'])).toBe(true)
    expect(isEnabledPluginSettingValue(false)).toBe(false)
    expect(isEnabledPluginSettingValue(undefined)).toBe(false)

    const cacheOnlyResult = await loadAllPluginsCacheOnly()
    expect(cacheOnlyResult.enabled).toContainEqual(
      expect.objectContaining({ source: 'demo@test-market', enabled: true }),
    )

    clearPluginCache('plugins-api-test-full-load')

    const { req, url, segments } = makeRequest('GET', '/api/plugins')
    const res = await handlePluginsApi(req, url, segments)

    expect(res.status).toBe(200)
    const body = await res.json() as {
      plugins: Array<{ id: string; enabled: boolean }>
      summary: { enabled: number }
    }
    expect(body.plugins).toContainEqual(
      expect.objectContaining({ id: 'demo@test-market', enabled: true }),
    )
    expect(body.summary.enabled).toBe(1)
  })

  it('POST /api/plugins/reload returns numeric counters', async () => {
    const { req, url, segments } = makeRequest('POST', '/api/plugins/reload', {})
    const res = await handlePluginsApi(req, url, segments)

    expect(res.status).toBe(200)
    const body = await res.json() as {
      ok: boolean
      summary: Record<string, number>
    }

    expect(body.ok).toBe(true)
    expect(typeof body.summary.enabled).toBe('number')
    expect(typeof body.summary.skills).toBe('number')
    expect(typeof body.summary.errors).toBe('number')
  })

  it('POST /api/plugins/reload hot-reloads an active CLI session and updates slash commands', async () => {
    const controlRequests: Array<{ sessionId: string; request: Record<string, unknown> }> = []
    conversationService.hasSession = ((sessionId: string) => sessionId === 'session-plugins') as typeof conversationService.hasSession
    conversationService.requestControl = (async (
      sessionId: string,
      request: Record<string, unknown>,
    ) => {
      controlRequests.push({ sessionId, request })
      return {
        commands: [
          {
            name: 'draw:render',
            description: 'Render a drawing.',
            argumentHint: '<prompt>',
          },
        ],
        agents: [{ name: 'draw-agent' }],
        plugins: [{ name: 'draw', path: '/tmp/draw', source: 'draw@test' }],
        mcpServers: [{ name: 'plugin:draw:server', type: 'connected' }],
        error_count: 0,
      }
    }) as typeof conversationService.requestControl

    const { req, url, segments } = makeRequest(
      'POST',
      '/api/plugins/reload?sessionId=session-plugins',
      {},
    )
    const res = await handlePluginsApi(req, url, segments)

    expect(res.status).toBe(200)
    const body = await res.json() as {
      session: {
        applied: boolean
        commands: number
        agents: number
        plugins: number
        mcpServers: number
        errors: number
      }
    }

    expect(controlRequests).toEqual([
      {
        sessionId: 'session-plugins',
        request: { subtype: 'reload_plugins' },
      },
    ])
    expect(body.session).toEqual({
      applied: true,
      commands: 1,
      agents: 1,
      plugins: 1,
      mcpServers: 1,
      errors: 0,
    })
    expect(getSlashCommands('session-plugins')).toEqual([
      {
        name: 'draw:render',
        description: 'Render a drawing.',
        argumentHint: '<prompt>',
      },
    ])
  })

  it('refreshActivePlugins rereads settings after an external enable toggle', async () => {
    const marketplaceRoot = path.join(tmpDir, 'marketplace-root')
    const pluginRoot = path.join(marketplaceRoot, 'plugins', 'draw')
    const pluginsDir = path.join(tmpDir, 'plugins')
    const marketplaceFile = path.join(
      marketplaceRoot,
      '.claude-plugin',
      'marketplace.json',
    )

    await fs.mkdir(path.join(pluginRoot, '.claude-plugin'), { recursive: true })
    await fs.mkdir(path.join(pluginRoot, 'commands'), { recursive: true })
    await fs.mkdir(path.dirname(marketplaceFile), { recursive: true })
    await fs.mkdir(pluginsDir, { recursive: true })

    await fs.writeFile(
      path.join(pluginRoot, '.claude-plugin', 'plugin.json'),
      JSON.stringify({
        name: 'draw',
        version: '1.0.0',
        description: 'Drawing plugin',
      }),
      'utf-8',
    )
    await fs.writeFile(
      path.join(pluginRoot, 'commands', 'render.md'),
      '---\ndescription: Render a drawing.\n---\nRender this drawing.',
      'utf-8',
    )
    await fs.writeFile(
      marketplaceFile,
      JSON.stringify({
        name: 'test-market',
        owner: { name: 'Test' },
        plugins: [
          {
            name: 'draw',
            source: './plugins/draw',
            version: '1.0.0',
          },
        ],
      }),
      'utf-8',
    )
    await fs.writeFile(
      path.join(pluginsDir, 'known_marketplaces.json'),
      JSON.stringify({
        'test-market': {
          source: { source: 'directory', path: marketplaceRoot },
          installLocation: marketplaceRoot,
          lastUpdated: new Date(0).toISOString(),
        },
      }),
      'utf-8',
    )

    const settingsPath = path.join(tmpDir, 'settings.json')
    await fs.writeFile(
      settingsPath,
      JSON.stringify({
        enabledPlugins: {
          'draw@test-market': false,
        },
      }),
      'utf-8',
    )

    const disabledResult = await loadAllPluginsCacheOnly()
    expect(disabledResult.enabled).toEqual([])
    expect(disabledResult.disabled).toContainEqual(
      expect.objectContaining({ source: 'draw@test-market', enabled: false }),
    )

    await fs.writeFile(
      settingsPath,
      JSON.stringify({
        enabledPlugins: {
          'draw@test-market': true,
        },
      }),
      'utf-8',
    )

    let appState = {
      plugins: {
        enabled: [],
        disabled: disabledResult.disabled,
        commands: [],
        errors: [],
        needsRefresh: true,
      },
      mcp: { pluginReconnectKey: 0 },
      agentDefinitions: { allAgents: [], errors: [] },
    } as unknown as AppState

    const result = await refreshActivePlugins(updater => {
      appState = updater(appState)
    })

    expect(result.enabled_count).toBe(1)
    expect(result.command_count).toBe(1)
    expect(result.pluginCommands).toContainEqual(
      expect.objectContaining({
        name: 'draw:render',
        description: 'Render a drawing.',
      }),
    )
    expect(appState.plugins.commands).toContainEqual(
      expect.objectContaining({ name: 'draw:render' }),
    )
  })
})