//https://docs.github.com/en/rest/repos/contents
export const onRequest = async (context: RouteContext): Promise<Response> => {
    const request = context.request;
    const env = context.env as Env;

    // 从 Authorization header 中获取 token
    const authHeader = request.headers.get('Authorization');
    if (!authHeader || (!authHeader.startsWith('Bearer ') && !authHeader.startsWith('token '))) {
        return new Response(JSON.stringify({ error: '未提供有效的授权令牌' }), {
            status: 401,
            headers: { 'Content-Type': 'application/json' }
        });
    }
    const githubToken = authHeader.startsWith('Bearer ') 
        ? authHeader.replace('Bearer ', '') 
        : authHeader.replace('token ', '');

    console.log('Request URL:', request.url);
    try {
        const url = new URL(request.url);

        // 提取仓库所有者和仓库名称
        const pathParts = url.pathname.split('/').filter(Boolean);
        const owner = pathParts[2] || url.searchParams.get('owner'); // 仓库所有者
        const repo = pathParts[3] || url.searchParams.get('repo'); // 仓库名称
        // 获取剩余的所有路径部分
        const path = pathParts.length > 4 ? pathParts.slice(4).join('/') : (url.searchParams.get('path') || "");
        if (!owner || !repo) {
            return new Response(JSON.stringify({ error: '缺少仓库所有者或仓库名称' }), {
                status: 400,
                headers: { 'Content-Type': 'application/json' }
            });
        }


        // GitHub API 基础 URL
        const githubApiBase = 'https://api.github.com';
        if (request.method === 'GET') {
            const ref = url.searchParams.get('ref'); // 分支或标签
            // 获取文件内容或列出目录
            const githubUrl = `${githubApiBase}/repos/${owner}/${repo}/contents/${path}${ref ? '?ref=' + ref : ''}`;
            console.log(githubUrl);
            const response = await fetch(githubUrl, {
                headers: {
                    'Authorization': `token ${githubToken}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'User-Agent': 'Cloudflare-Worker'
                }
            });

            const data = await response.json();

            return new Response(JSON.stringify(data), {
                status: response.status,
                headers: { 'Content-Type': 'application/json' }
            });
        }

        if (request.method === 'POST') {

            // 创建新文件
            const body = await request.json() as any;

            const { content, message, branch } = body;

            if (!path || content === undefined) {
                return new Response(JSON.stringify({ error: '缺少必要参数: path, content' }), {
                    status: 400,
                    headers: { 'Content-Type': 'application/json' }
                });
            }

            // Base64 编码内容
            let encodedContent;
            try {
                // 检查内容是否已经是 Base64 编码
                atob(content);
                encodedContent = content;
            } catch (e) {
                // 如果不是，则编码它
                const encoder = new TextEncoder();
                const bytes = encoder.encode(content);
                encodedContent = btoa(String.fromCharCode.apply(null, [...new Uint8Array(bytes)]));
            }

            const githubUrl = `${githubApiBase}/repos/${owner}/${repo}/contents/${path}`;

            const response = await fetch(githubUrl, {
                method: 'PUT',
                headers: {
                    'Authorization': `token ${githubToken}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'Content-Type': 'application/json',
                    'User-Agent': 'Cloudflare-Worker'
                },
                body: JSON.stringify({
                    message: message || `Create file ${path}`,
                    content: encodedContent,
                    branch: branch
                })
            });

            const data = await response.json();

            return new Response(JSON.stringify(data), {
                status: response.status,
                headers: { 'Content-Type': 'application/json' }
            });
        }

        if (request.method === 'PUT') {
            // 更新现有文件

            const body = await request.json() as any;
            const { content, message, sha, branch } = body;

            if (!path || content === undefined || !sha) {
                return new Response(JSON.stringify({ error: '缺少必要参数: path, content, sha' }), {
                    status: 400,
                    headers: { 'Content-Type': 'application/json' }
                });
            }

            // Base64 编码内容
            let encodedContent;
            try {
                atob(content);
                encodedContent = content;
            } catch (e) {
                encodedContent = btoa(unescape(encodeURIComponent(content)));
            }

            const githubUrl = `${githubApiBase}/repos/${owner}/${repo}/contents/${path}`;

            const response = await fetch(githubUrl, {
                method: 'PUT',
                headers: {
                    'Authorization': `token ${githubToken}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'Content-Type': 'application/json',
                    'User-Agent': 'Cloudflare-Worker'
                },
                body: JSON.stringify({
                    message: message || `Update file ${path}`,
                    content: encodedContent,
                    sha: sha,
                    branch: branch
                })
            });

            const data = await response.json();

            return new Response(JSON.stringify(data), {
                status: response.status,
                headers: { 'Content-Type': 'application/json' }
            });
        }

        if (request.method === 'DELETE') {

            const body = await request.json() as any;
            // 单个文件删除
            const { message, sha, branch } = body;

            if (!path || !sha) {
                return new Response(JSON.stringify({ error: '缺少必要参数: path, sha' }), {
                    status: 400,
                    headers: { 'Content-Type': 'application/json' }
                });
            }

            const githubUrl = `${githubApiBase}/repos/${owner}/${repo}/contents/${path}`;

            const response = await fetch(githubUrl, {
                method: 'DELETE',
                headers: {
                    'Authorization': `token ${githubToken}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'Content-Type': 'application/json',
                    'User-Agent': 'Cloudflare-Worker'
                },
                body: JSON.stringify({
                    message: message || `Delete file ${path}`,
                    sha: sha,
                    branch: branch
                })
            });

            const data = await response.json();

            return new Response(JSON.stringify(data), {
                status: response.status,
                headers: { 'Content-Type': 'application/json' }
            });

        }

        // 不支持的请求方法
        return new Response(JSON.stringify({ error: '不支持的请求方法' }), {
            status: 405,
            headers: { 'Content-Type': 'application/json' }
        });
    } catch (error: any) {
        return new Response(JSON.stringify({ error: '服务器内部错误', details: error.message }), {
            status: 500,
            headers: { 'Content-Type': 'application/json' }
        });
    }
};