import { reactive } from 'vue';

const state = reactive({
  isGitRepo: false,
  statusOutput: '',
  statusFiles: [],
  remoteUrl: '',
  loading: false
});

export function useGit() {
  
  const checkGitRepo = async (rootDir) => {
    if (!window.services?.isGitRepository) return;
    state.isGitRepo = await window.services.isGitRepository(rootDir);
    if (state.isGitRepo) {
        // 自动获取一次状态
        await getStatus(rootDir);
        await getRemoteUrl(rootDir);
    }
  };

  const getRemoteUrl = async (rootDir) => {
    try {
      const res = await window.services.gitRemoteUrl(rootDir);
      if (res.success) {
        state.remoteUrl = res.stdout.trim();
      }
    } catch (e) {
      console.error("Failed to get remote url", e);
    }
  };

  const openRemoteUrl = () => {
    if (state.remoteUrl) {
      window.services.openExternal(state.remoteUrl);
    }
  };

  const getStatus = async (rootDir) => {
    state.loading = true;
    try {
      const res = await window.services.gitStatus(rootDir);
      if (res.success) {
        state.statusOutput = res.stdout;
        // 解析状态文件列表
        state.statusFiles = res.stdout
          .split('\n')
          .filter(line => line.trim())
          .map(line => {
            // git status --short 格式: XY PATH
            // 前两个字符是状态，后面是路径
            const status = line.substring(0, 2);
            const path = line.substring(3);
            return { status, path };
          });
      }
    } finally {
      state.loading = false;
    }
  };

  const commit = async (rootDir, message) => {
    state.loading = true;
    try {
      await window.services.gitAdd(rootDir); // 默认 add .
      const res = await window.services.gitCommit(rootDir, message);
      return res;
    } finally {
      state.loading = false;
      await getStatus(rootDir);
    }
  };

  const push = async (rootDir) => {
    state.loading = true;
    try {
      return await window.services.gitPush(rootDir);
    } finally {
      state.loading = false;
      await getStatus(rootDir);
    }
  };

  const pull = async (rootDir) => {
    state.loading = true;
    try {
      return await window.services.gitPull(rootDir);
    } finally {
      state.loading = false;
      await getStatus(rootDir);
    }
  };

  return {
    state,
    checkGitRepo,
    getStatus,
    getRemoteUrl,
    openRemoteUrl,
    commit,
    push,
    pull
  };
}