import { ipcMain, app, BrowserWindow } from 'electron';
import { IPC_EVENTS } from '@lib/constants';
import { launchLocalChrome } from '@electron/utils/chrome/launchLocalChrome'
import { executeScriptService } from '@electron/service/execute-script-service';
import {
  listScripts,
  getScript,
  saveScript,
  deleteScript,
  toggleScript,
} from '@electron/service/script-store-service';
import { runScriptById } from '@electron/service/script-execution-service';
import fs from 'fs'
import path from 'path'
import { spawn } from 'child_process'
import log from 'electron-log';
import { randomUUID } from 'crypto';

const openedTabIndexByChannelName = new Map<string, number>()

function getScriptsDir() {
  return app.isPackaged
    ? path.join(__dirname, 'scripts')
    : path.join(process.cwd(), 'electron/scripts')
}

export function runTaskOperationService() {
  const executeScriptServiceInstance = new executeScriptService();
  const playwrightCoreDir = path.dirname(require.resolve('playwright-core'));
  const cliPath = path.join(playwrightCoreDir, 'cli.js');
  let recorderProc: ReturnType<typeof spawn> | null = null;

  // 脚本管理 IPC
  ipcMain.handle(IPC_EVENTS.SCRIPT_LIST, async () => {
    try {
      return listScripts();
    } catch (error: any) {
      log.error('[SCRIPT_LIST] error:', error);
      throw error;
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_GET, async (_event, id: string) => {
    try {
      return getScript(id);
    } catch (error: any) {
      log.error('[SCRIPT_GET] error:', error);
      throw error;
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_SAVE, async (_event, input: any) => {
    try {
      return saveScript(input);
    } catch (error: any) {
      log.error('[SCRIPT_SAVE] error:', error);
      throw error;
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_DELETE, async (_event, id: string) => {
    try {
      return deleteScript(id);
    } catch (error: any) {
      log.error('[SCRIPT_DELETE] error:', error);
      throw error;
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_TOGGLE, async (_event, id: string, enabled: boolean) => {
    try {
      return toggleScript(id, enabled);
    } catch (error: any) {
      log.error('[SCRIPT_TOGGLE] error:', error);
      throw error;
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_RUN, async (_event, id: string) => {
    try {
      const script = getScript(id);
      return await runScriptById(id, script?.channel);
    } catch (error: any) {
      log.error('[SCRIPT_RUN] error:', error);
      return { success: false, exitCode: null, stdoutTail: '', stderrTail: '', error: error?.message || 'Run failed' };
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_RECORD_START, async (_event, url?: string) => {
    try {
      if (recorderProc) {
        recorderProc.kill('SIGINT');
        recorderProc = null;
      }

      const targetUrl = url || 'about:blank';
      recorderProc = spawn(process.execPath, [cliPath, 'codegen', '--target', 'javascript', '--channel', 'chrome', '--viewport-size', '1920,1080', '--color-scheme', 'light', targetUrl], {
        env: { ...process.env, ELECTRON_RUN_AS_NODE: '1' },
        stdio: 'pipe',
      });

      recorderProc.on('error', (err) => {
        log.error('[SCRIPT_RECORD_START] Failed to start codegen process:', err);
      });

      recorderProc.on('exit', (code, signal) => {
        log.info(`[SCRIPT_RECORD_START] Process exited code=${code} signal=${signal}`);
        recorderProc = null;
      });

      recorderProc.stdout?.on('data', (data: Buffer) => {
        log.info(`[SCRIPT_RECORD_START] stdout: ${data.toString()}`);
      });

      recorderProc.stderr?.on('data', (data: Buffer) => {
        log.error(`[SCRIPT_RECORD_START] stderr: ${data.toString()}`);
      });

      return { success: true };
    } catch (error: any) {
      log.error('[SCRIPT_RECORD_START] error:', error);
      return { success: false, error: error?.message || 'Recording start failed' };
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_RECORD_STOP, async () => {
    try {
      if (recorderProc) {
        recorderProc.kill('SIGINT');
        recorderProc = null;
      }
      return { success: true, code: '' };
    } catch (error: any) {
      log.error('[SCRIPT_RECORD_STOP] error:', error);
      return { success: false, error: error?.message || 'Recording stop failed' };
    }
  });

  ipcMain.handle(IPC_EVENTS.SCRIPT_CODEGEN, async (_event, id: string, url?: string) => {
    try {
      const script = getScript(id);
      if (!script) {
        return { success: false, error: 'Script not found' };
      }

      const scriptsDir = getScriptsDir();
      const scriptPath = path.join(scriptsDir, script.filename);
      const targetUrl = url || 'about:blank';

      log.info(`[SCRIPT_CODEGEN] Starting codegen for script ${id} at ${scriptPath} with url ${targetUrl}`);

      return await new Promise<{ success: boolean; code?: string; error?: string }>((resolve) => {
        const proc = spawn(process.execPath, [cliPath, 'codegen', '--target', 'javascript', '--channel', 'chrome', '-o', scriptPath, targetUrl], {
          env: { ...process.env, ELECTRON_RUN_AS_NODE: '1' },
          stdio: 'pipe',
        });

        proc.on('exit', () => {
          try {
            let generatedCode = fs.readFileSync(scriptPath, 'utf-8');

            // Playwright codegen --target javascript generates CommonJS code.
            // Since script files use .mjs extension, we inject createRequire for compatibility.
            if (generatedCode.includes("require('playwright')") && !generatedCode.includes('createRequire')) {
              generatedCode = `import { createRequire } from 'node:module';\nconst require = createRequire(import.meta.url);\n\n${generatedCode}`;
            }

            fs.writeFileSync(scriptPath, generatedCode, 'utf-8');

            // Update script store so the new code is reflected in metadata reads
            saveScript({
              id,
              name: script.name,
              description: script.description,
              code: generatedCode,
              channel: script.channel,
              enabled: script.enabled,
            });

            resolve({ success: true, code: generatedCode });
          } catch (err: any) {
            log.error('[SCRIPT_CODEGEN] Failed to process generated code:', err);
            resolve({ success: false, error: err?.message || 'Failed to process generated code' });
          }
        });

        proc.on('error', (err) => {
          log.error('[SCRIPT_CODEGEN] Failed to start codegen:', err);
          resolve({ success: false, error: err.message });
        });
      });
    } catch (error: any) {
      log.error('[SCRIPT_CODEGEN] error:', error);
      return { success: false, error: error?.message || 'Codegen failed' };
    }
  });

  // 打开渠道
  ipcMain.handle(IPC_EVENTS.OPEN_CHANNEL, async (_event, channels: any) => {
    try {
      await launchLocalChrome()

      const scriptsDir = getScriptsDir()
      const scriptPath = path.join(scriptsDir, 'open_all_channel.js')

      openedTabIndexByChannelName.clear()

      const validChannels = Array.isArray(channels)
        ? channels.filter((c) => c && typeof c === 'object' && c.channelUrl)
        : []

      if (validChannels.length === 0) {
        return { success: false, error: '没有可用的渠道配置' }
      }

      for (let i = 0; i < validChannels.length; i++) {
        const name = validChannels[i]?.channelName
        if (name) openedTabIndexByChannelName.set(String(name), i)
      }

      const result = await executeScriptServiceInstance.executeScript(scriptPath, { channels: validChannels })
      return { success: true, result }
    } catch (error) {
      return { success: false, error: (error as any)?.message || 'open channel failed' }
    }
  })

  // 执行脚本
  ipcMain.handle(IPC_EVENTS.EXECUTE_SCRIPT, async (_event, options: any) => {
    try {
      const taskId = options.taskId || randomUUID();
      const roomTypeRaw = options.roomList.find((item: any) => item.id === options.roomType);
      const roomType = roomTypeRaw
        ? {
            ...roomTypeRaw,
            dyHotSpringName: roomTypeRaw.dyHotSpringName ?? roomTypeRaw.dyHotSrpingName,
            dyHotSrpingName: roomTypeRaw.dyHotSrpingName ?? roomTypeRaw.dyHotSpringName,
          }
        : null;

      const pairs: Array<[string, string]> = [
        ['fzName', 'fg_trace.js'],
        ['mtName', 'mt_trace.js'],
        ['dyHotelName', 'dy_hotel_trace.js'],
        ['dyHotSpringName', 'dy_hot_spring_trace.js']
      ]
      const scriptEntries = pairs.filter(([prop]) => {
        if (prop === 'dyHotSpringName') {
          return roomType?.dyHotSpringName || roomType?.dyHotSrpingName
        }
        return roomType?.[prop]
      })

      const scriptsDir = getScriptsDir()

      const scriptPaths = scriptEntries.map(([channel, fileName]) => {
        const p = path.join(scriptsDir, fileName)
        if (!fs.existsSync(p)) {
          throw new Error(`Script not found for channel ${channel}: ${p}`)
        }
        return { channel, fileName, scriptPath: p }
      })

      const channelNameMap: Record<string, string> = {
        fzName: 'fliggy',
        mtName: 'meituan',
        dyHotelName: 'douyin',
        dyHotSpringName: 'douyin',
      }
      const defaultTabIndexMap: Record<string, number> = {
        fliggy: 0,
        meituan: 1,
        douyin: 2
      }

      const results: any[] = []
      for (let i = 0; i < scriptPaths.length; i++) {
        const item = scriptPaths[i]
        const subTaskId = `${taskId}_${item.channel}`;
        const mappedName = channelNameMap[item.channel]
        const tabIndex = mappedName ? (openedTabIndexByChannelName.get(mappedName) ?? defaultTabIndexMap[mappedName] ?? i) : i

        const win = BrowserWindow.getAllWindows()[0];
        win?.webContents.send(IPC_EVENTS.TASK_STARTED, {
          taskId,
          subTaskId,
          scriptId: item.fileName,
          name: item.channel,
        });

        const onProgress = (payload: any) => {
          win?.webContents.send(IPC_EVENTS.TASK_PROGRESS, payload);
        };
        const onStdout = (payload: any) => {
          win?.webContents.send(IPC_EVENTS.TASK_PROGRESS, {
            ...payload,
            stdoutTail: payload.text,
          });
        };
        const onStderr = (payload: any) => {
          win?.webContents.send(IPC_EVENTS.TASK_PROGRESS, {
            ...payload,
            stderrTail: payload.text,
          });
        };

        executeScriptServiceInstance.on('progress', onProgress);
        executeScriptServiceInstance.on('stdout', onStdout);
        executeScriptServiceInstance.on('stderr', onStderr);

        log.info(`Launching script for channel ${item.channel}: ${item.scriptPath} (tabIndex: ${tabIndex})`)
        const result = await executeScriptServiceInstance.executeScript(
          item.scriptPath,
          {
            roomType: item.channel === 'dyHotSpringName'
              ? (roomType.dyHotSpringName || roomType.dyHotSrpingName)
              : roomType[item.channel],
            startTime: options.startTime,
            endTime: options.endTime,
            operation: options.operation,
            tabIndex,
          },
          taskId,
          subTaskId,
        );

        executeScriptServiceInstance.off('progress', onProgress);
        executeScriptServiceInstance.off('stdout', onStdout);
        executeScriptServiceInstance.off('stderr', onStderr);

        win?.webContents.send(IPC_EVENTS.TASK_COMPLETED, {
          taskId,
          subTaskId,
          success: result.success,
          exitCode: result.exitCode,
          error: result.error,
        });

        results.push({
          channel: item.channel,
          scriptPath: item.scriptPath,
          ...result,
        })
      }

      return { success: true, result: results };
    } catch (error: any) {
      return { success: false, error: error.message };
    }
  });
}