import logManager from '@electron/service/logger';
import { extractBrowserOpenIntent, openUrlInBrowser } from '@electron/service/browser-open-service';
import { appendTranscriptLine } from '@electron/utils/token-usage-writer';
import type { RawMessage, ToolStatus } from '@runtime/shared/chat-model';
import { sessionStore } from './session-store';
import type { GatewayEvent } from './types';

function buildBrowserOpenResponseText(result: { pageUrl: string; title?: string }): string {
  const suffix = result.title ? `（${result.title}）` : '';
  return `已为你打开 ${result.pageUrl}${suffix}`;
}

function buildBrowserOpenErrorText(error: unknown): string {
  return `打开失败：${error instanceof Error ? error.message : String(error)}`;
}

async function processBrowserOpen(
  sessionKey: string,
  runId: string,
  url: string,
  signal: AbortSignal,
  broadcast: (event: GatewayEvent) => void,
) {
  let assistantText = '';
  const toolCallId = `browser.open_url:${runId}`;
  const startedAt = Date.now();
  let finalToolStatus: ToolStatus | null = null;

  broadcast({
    type: 'tool:status',
    sessionKey,
    runId,
    toolCallId,
    toolName: 'browser.open_url',
    status: 'running',
    updatedAt: startedAt,
    summary: `Opening ${url}`,
    input: { url },
  });

  try {
    const result = await openUrlInBrowser(url, { signal });
    if (signal.aborted) {
      return;
    }
    assistantText = buildBrowserOpenResponseText(result);
    finalToolStatus = {
      id: toolCallId,
      toolCallId,
      name: 'browser.open_url',
      status: 'completed',
      updatedAt: Date.now(),
      durationMs: Date.now() - startedAt,
      summary: assistantText,
      input: { url },
      result,
    };
    broadcast({
      type: 'tool:status',
      sessionKey,
      runId,
      toolCallId,
      toolName: 'browser.open_url',
      status: finalToolStatus.status,
      updatedAt: finalToolStatus.updatedAt,
      durationMs: finalToolStatus.durationMs,
      summary: finalToolStatus.summary,
      input: finalToolStatus.input,
      result: finalToolStatus.result,
    });
  } catch (error) {
    if (signal.aborted) {
      return;
    }
    assistantText = buildBrowserOpenErrorText(error);
    finalToolStatus = {
      id: toolCallId,
      toolCallId,
      name: 'browser.open_url',
      status: 'error',
      updatedAt: Date.now(),
      durationMs: Date.now() - startedAt,
      summary: assistantText,
      input: { url },
      result: {
        error: error instanceof Error ? error.message : String(error),
      },
    };
    broadcast({
      type: 'tool:status',
      sessionKey,
      runId,
      toolCallId,
      toolName: 'browser.open_url',
      status: finalToolStatus.status,
      updatedAt: finalToolStatus.updatedAt,
      durationMs: finalToolStatus.durationMs,
      summary: finalToolStatus.summary,
      input: finalToolStatus.input,
      result: finalToolStatus.result,
    });
  }

  sessionStore.clearActiveRun(sessionKey);

  const finalMessage: RawMessage = {
    role: 'assistant',
    content: assistantText,
    timestamp: Date.now(),
    _toolStatuses: finalToolStatus ? [finalToolStatus] : undefined,
  };
  sessionStore.appendMessage(sessionKey, finalMessage);

  appendTranscriptLine(sessionKey, {
    type: 'message',
    timestamp: new Date().toISOString(),
    message: {
      role: 'assistant',
      content: assistantText,
      tool: 'browser.open_url',
    },
  });

  broadcast({
    type: 'chat:final',
    sessionKey,
    runId,
    message: finalMessage,
  });
}

export function maybeHandleBrowserOpenMessage(
  sessionKey: string,
  runId: string,
  message: RawMessage,
  broadcast: (event: GatewayEvent) => void,
): boolean {
  const browserIntent = typeof message.content === 'string'
    ? extractBrowserOpenIntent(message.content)
    : null;

  if (!browserIntent) {
    return false;
  }

  const abortController = new AbortController();
  sessionStore.setActiveRun(sessionKey, runId, abortController);

  processBrowserOpen(sessionKey, runId, browserIntent.url, abortController.signal, broadcast).catch(
    (error) => {
      logManager.error('Unexpected error in processBrowserOpen:', error);
      sessionStore.clearActiveRun(sessionKey);
      broadcast({
        type: 'chat:error',
        sessionKey,
        runId,
        error: error instanceof Error ? error.message : String(error),
      });
    },
  );

  return true;
}