// ==UserScript==
// @name         备份 GitHub 仓库至 Framagit
// @namespace    https://docs.scriptcat.org/
// @version      0.1.0
// @description  在 GitHub 仓库页面添加“备份到 Framagit”按钮，点击后通过 API 创建项目
// @author       Jetsung Chan <i@jetsung.com>
// @match        https://github.com/*/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=github.com
// @grant        GM_xmlhttpRequest
// @grant        GM_getValue
// @grant        GM_setValue
// @connect      framagit.org
// @run-at       document-end
// ==/UserScript==

(async function() {
    'use strict';

    const FRAMAGIT_BASE = 'https://framagit.org';
    const API_BASE = FRAMAGIT_BASE + '/api/v4';

    // ---------------- 配置读取与首次设置 ----------------
    let config = {
        namespaceId: GM_getValue('framagit_namespaceId', null),
        namespaceName: GM_getValue('framagit_namespaceName', null),
        token: GM_getValue('framagit_token', null)
    };

    // 首次使用或配置缺失时弹出设置
    if (!config.namespaceId || !config.namespaceName || !config.token) {
        const nsId = prompt(
            '请输入 Framagit 组织/组的 Namespace ID（数字）',
            config.namespaceId || '224838'
        );
        const nsName = prompt(
            '请输入 Framagit 组织/组的路径名称（path）',
            config.namespaceName || 'fork'
        );
        const tokenInput = prompt(
            '请输入你的 Framagit Personal Access Token',
            ''
        );

        if (nsId && nsName && tokenInput) {
            GM_setValue('framagit_namespaceId', parseInt(nsId, 10));
            GM_setValue('framagit_namespaceName', nsName.trim());
            GM_setValue('framagit_token', tokenInput.trim());
            config = {
                namespaceId: parseInt(nsId, 10),
                namespaceName: nsName.trim(),
                token: tokenInput.trim()
            };
            showToast('配置已保存', 'success');
        } else {
            showToast('配置取消或不完整，脚本无法使用', 'error');
            return;
        }
    }

    // ---------------- Toast 通知函数 ----------------
    function showToast(message, type = 'info', duration = 4000) {
        const toast = document.createElement('div');
        toast.style.position = 'fixed';
        toast.style.top = '16px';
        toast.style.left = '50%';
        toast.style.transform = 'translateX(-50%)';
        toast.style.zIndex = '999999';
        toast.style.padding = '12px 24px';
        toast.style.borderRadius = '6px';
        toast.style.fontSize = '14px';
        toast.style.fontWeight = '500';
        toast.style.maxWidth = '80%';
        toast.style.boxShadow = '0 4px 12px rgba(0,0,0,0.15)';
        toast.style.transition = 'all 0.3s ease';
        toast.style.opacity = '0';
        toast.style.pointerEvents = 'auto';
        toast.style.whiteSpace = 'pre-wrap';           // 保留换行，方便显示多行文本
        toast.style.wordBreak = 'break-all';           // 长 URL 自动换行

        // 根据类型设置颜色（模仿 GitHub 风格）
        if (type === 'success') {
            toast.style.backgroundColor = '#2ea44f';
            toast.style.color = 'white';
        } else if (type === 'error') {
            toast.style.backgroundColor = '#d73a49';
            toast.style.color = 'white';
        } else if (type === 'warning') {
            toast.style.backgroundColor = '#dbab09';
            toast.style.color = '#1c1e26';
        } else {
            toast.style.backgroundColor = '#0366d6';
            toast.style.color = 'white';
        }

        // 支持链接
        toast.innerHTML = message.replace(
            /(https?:\/\/[^\s<]+)/g,
            '<a href="$1" target="_blank" style="color:inherit;text-decoration:underline;">$1</a>'
        );

        document.body.appendChild(toast);

        // 淡入
        setTimeout(() => {
            toast.style.opacity = '1';
        }, 10);

        // 自动消失
        setTimeout(() => {
            toast.style.opacity = '0';
            setTimeout(() => toast.remove(), 300);
        }, duration);
    }
    // ---------------- gmFetch 封装 ----------------
    function gmFetch(url, options = {}) {
        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                method: options.method || 'GET',
                url,
                headers: {
                    ...options.headers,
                },
                data: options.body,
                responseType: 'json',
                anonymous: true,
                timeout: 15000,
                onload: (response) => {
                    const resp = {
                        ok: response.status >= 200 && response.status < 300,
                        status: response.status,
                        json: () => {
                            try { return JSON.parse(response.responseText); } catch { return {}; }
                        },
                        text: () => Promise.resolve(response.responseText || ''),
                    };
                    resolve(resp);
                },
                onerror: reject,
                ontimeout: () => reject(new Error('请求超时')),
            });
        });
    }

    function getRepoInfo() {
        const pathParts = location.pathname.split('/').filter(Boolean);
        if (pathParts.length < 2) return null;
        const owner = pathParts[0];
        const repo = pathParts[1];

        let description = '';
        const descEl = document.querySelector('.BorderGrid .f4');
        if (descEl) description = descEl.textContent.trim();

        return { owner, repo, description };
    }

    async function projectExists(repoName) {
        const encodedPath = `${config.namespaceName}%2F${encodeURIComponent(repoName)}`;
        const url = `${API_BASE}/projects/${encodedPath}`;

        try {
            const resp = await gmFetch(url, {
                method: 'GET',
                headers: { 'PRIVATE-TOKEN': config.token },
            });

            if (resp.status === 200) {
                return { exists: true, project: await resp.json() };
            }
            if (resp.status === 404) {
                return { exists: false };
            }
            const errText = await resp.text();
            throw new Error(`检查失败 ${resp.status} - ${errText}`);
        } catch (err) {
            console.error('检查项目是否存在失败', err);
            return { exists: false, error: err.message };
        }
    }

    async function createFramagitProject(owner, repoName, description) {
        const repoDescription = `::${owner}/${repoName} [GitHub](https://github.com/${owner}/${repoName}) | ` + (description || '');
        const url = `${API_BASE}/projects`;

        const payload = {
            name: repoName,
            path: repoName,
            visibility: 'private',
            description: repoDescription,
            namespace_id: config.namespaceId,
        };

        const resp = await gmFetch(url, {
            method: 'POST',
            headers: {
                'PRIVATE-TOKEN': config.token,
                'Content-Type': 'application/json',
            },
            body: JSON.stringify(payload),
        });

        if (resp.ok) {
            return await resp.json();
        }

        // 处理非 2xx 响应
        const err = await resp.json().catch(() => ({}));
        throw new Error(err.message || err.error || `HTTP ${resp.status}`);
    }

    function addButton() {
        let actionsUl = document.querySelector('ul.pagehead-actions');
        if (!actionsUl) return;
        if (document.getElementById('btn-to-framagit')) return;

        const li = document.createElement('li');
        li.style.marginLeft = '4px';

        const btn = document.createElement('button');
        btn.id = 'btn-to-framagit';
        btn.type = 'button';
        btn.className = 'btn-sm btn BtnGroup-item';
        btn.innerHTML = `
            <svg aria-hidden="true" height="16" viewBox="0 0 16 16" width="16" class="octicon octicon-repo-forked mr-1">
                <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path>
            </svg>
            备份到 Framagit
        `;
        btn.title = "在 Framagit 创建同名项目（仅创建项目，不自动导入代码）";

        btn.addEventListener('click', async () => {
            const info = getRepoInfo();
            if (!info) {
                showToast('无法获取当前仓库信息', 'error');
                return;
            }

            const { owner, repo, description } = info;
        // ★ 保存原始按钮内容（图标 + 文字）
            const originalHTML = btn.innerHTML;            

            btn.disabled = true;
            btn.textContent = '检查中...';

            const check = await projectExists(repo);

            if (check.exists) {
                const proj = check.project;
                const url = `${FRAMAGIT_BASE}/${proj.path_with_namespace}`;
                // 项目已存在时
                showToast(
                    `该项目已在 Framagit 存在！\n\n` +
                    `项目名称：${proj.name}\n` +
                    `地址：${url}\n\n` +
                    `操作已取消。`,
                    'warning',
                    6000
                );
                btn.disabled = false;
                btn.innerHTML = originalHTML;
                return;
            }

            if (check.error) {
                showToast(`检查失败：${check.error}`, 'error');
                btn.disabled = false;
                btn.innerHTML = originalHTML;
                return;
            }

            btn.textContent = '创建中...';

            try {
                const data = await createFramagitProject(owner, repo, description);
                const url = `${FRAMAGIT_BASE}/${data.path_with_namespace}`;
                // 创建成功时
                showToast(
                    `创建成功！\n` +
                    `项目地址：${url}`,
                    'success',
                    8000
                );
            } catch (err) {
                // 错误提示
                showToast(`创建失败：${err.message}`, 'error', 6000);
                console.error(err);
            } finally {
                btn.disabled = false;
                btn.innerHTML = originalHTML;
            }
        });

        li.appendChild(btn);
        actionsUl.appendChild(li);
    }

    setTimeout(addButton, 1200);

    const observer = new MutationObserver(() => {
        if (document.querySelector('ul.pagehead-actions')) {
            addButton();
        }
    });
    observer.observe(document.body, { childList: true, subtree: true });

})();