(function () {
    const PY_EXTENSIONS = new Set(['.py']);
    const R_EXTENSIONS = new Set(['.r']);

    function normalizedRelativePath(file) {
        const relative = String(file.webkitRelativePath || file.relativePath || file.name || '').replace(/^\/+/, '');
        return relative.split('\\').join('/');
    }

    function parsePythonImports(content) {
        const imports = new Set();
        const lines = String(content || '').split(/\r?\n/);
        for (const line of lines) {
            let match = line.match(/^\s*import\s+([A-Za-z0-9_.,\s]+)/);
            if (match) {
                match[1].split(',').forEach((item) => {
                    const token = item.trim().split(/\s+as\s+/i)[0].split('.')[0].trim();
                    if (token) imports.add(token);
                });
            }
            match = line.match(/^\s*from\s+([A-Za-z0-9_.]+)\s+import\s+/);
            if (match) {
                const token = match[1].split('.')[0].trim();
                if (token) imports.add(token);
            }
        }
        return Array.from(imports);
    }

    function parseRPackages(content) {
        const packages = new Set();
        const pattern = /(?:library|require)\(\s*["']?([A-Za-z0-9_.-]+)["']?\s*\)/g;
        let match;
        const text = String(content || '');
        while ((match = pattern.exec(text)) !== null) {
            if (match[1]) packages.add(match[1]);
        }
        return Array.from(packages);
    }

    function commonPathPrefix(files) {
        const paths = files.map((f) => normalizedRelativePath(f).split('/')).filter((parts) => parts.length > 0);
        if (!paths.length) return '';
        const first = paths[0];
        let prefixLen = 0;
        for (let i = 0; i < first.length; i++) {
            if (!paths.every((parts) => parts[i] === first[i])) break;
            prefixLen = i + 1;
        }
        return first.slice(0, prefixLen).join('/');
    }

    function sanitizeDisplayName(raw) {
        return String(raw || '').replace(/[^A-Za-z0-9_-]+/g, '_').replace(/^_+|_+$/g, '') || 'lightweight_extension';
    }

    function extractRootName(files) {
        const prefix = commonPathPrefix(files);
        const base = (prefix && prefix !== 'raw_code' && prefix !== 'raw_test_data')
            ? sanitizeDisplayName(prefix.split('/')[0])
            : 'lightweight_extension_drop';
        const ts = Date.now();
        return base + '_' + ts;
    }

    function splitFixedStructure(files) {
        const codeFiles = [];
        const dataFiles = [];
        let hasRunScript = false;
        let prefix = commonPathPrefix(files);
        if (prefix && !prefix.endsWith('/')) prefix += '/';

        const sampled = [];
        for (const file of files) {
            let relativePath = normalizedRelativePath(file);
            if (prefix && relativePath.startsWith(prefix)) {
                relativePath = relativePath.slice(prefix.length);
            }
            if (sampled.length < 10) sampled.push(relativePath);
            if (relativePath.startsWith('raw_code/')) {
                file.lightweightRelativePath = relativePath.slice('raw_code/'.length) || file.name;
                codeFiles.push(file);
                if (relativePath === 'raw_code/run.sh') {
                    hasRunScript = true;
                }
            } else if (relativePath.startsWith('raw_test_data/')) {
                file.lightweightRelativePath = relativePath.slice('raw_test_data/'.length) || file.name;
                dataFiles.push(file);
            }
        }
        if (!codeFiles.length) {
            const preview = sampled.length ? sampled.slice(0, 10).join(', ') : '(无)';
            throw new Error('缺少 raw_code/ 目录（检测到的路径样例: ' + preview + '）');
        }
        if (!dataFiles.length) {
            throw new Error('缺少 raw_test_data/ 目录');
        }
        if (!hasRunScript) {
            throw new Error('缺少 raw_code/run.sh');
        }
        return { codeFiles, dataFiles };
    }

    async function extractDependencies(files) {
        const pythonImports = new Set();
        const rPackages = new Set();
        for (const file of files) {
            const path = normalizedRelativePath(file);
            const lower = path.toLowerCase();
            const extension = lower.includes('.') ? lower.slice(lower.lastIndexOf('.')) : '';
            if (!PY_EXTENSIONS.has(extension) && !R_EXTENSIONS.has(extension)) {
                continue;
            }
            const content = await file.text();
            if (PY_EXTENSIONS.has(extension)) {
                parsePythonImports(content).forEach((name) => pythonImports.add(name));
            } else {
                parseRPackages(content).forEach((name) => rPackages.add(name));
            }
        }
        return {
            python_imports: Array.from(pythonImports),
            r_packages: Array.from(rPackages),
        };
    }

    async function encodeBase64(file) {
        const buffer = await file.arrayBuffer();
        const bytes = new Uint8Array(buffer);
        let binary = '';
        const chunkSize = 0x8000;
        for (let index = 0; index < bytes.length; index += chunkSize) {
            binary += String.fromCharCode(...bytes.subarray(index, index + chunkSize));
        }
        return btoa(binary);
    }

    async function importFolderToJob(hooks, rootName, files) {
        const payload = {
            job_id: String(hooks.jobInfo.job_id || '').trim(),
            root_name: rootName,
            files: [],
            relative_paths: [],
        };
        for (const file of files) {
            payload.files.push(await encodeBase64(file));
            payload.relative_paths.push(normalizedRelativePath(file));
        }
        const response = await fetch('/api/job/import-folder', {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify(payload),
        });
        const data = await response.json();
        if (!response.ok || !data.success) {
            throw new Error(data.detail || data.error || data.message || 'Job 导入失败');
        }
        return data;
    }

    async function resolveRuntimeEnv(files) {
        const dependencies = await extractDependencies(files);
        console.log('[lightWeightExtensionTest] 提取的依赖:', JSON.stringify(dependencies), '| 扫描文件数:', files.length);
        try {
            const response = await fetch('/api/extension-stages/envs/resolve', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(dependencies),
            });
            const data = await response.json();
            console.log('[lightWeightExtensionTest] 后端 env/resolve 原始响应:', response.status, JSON.stringify(data).slice(0, 500));
            if (!response.ok || !data.success) {
                throw new Error(data.detail || data.error || data.message || '运行环境解析失败');
            }
            return data;
        } catch (e) {
            console.error('[lightWeightExtensionTest] env/resolve 调用失败:', e);
            throw e;
        }
    }

    function notifyError(message) {
        if (window.ElementPlus && window.ElementPlus.ElMessage) {
            window.ElementPlus.ElMessage.error(message);
        }
    }

    async function ensureJob(hooks) {
        if (String(hooks.jobInfo.job_id || '').trim() && String(hooks.jobInfo.job_id) !== 'default_job') {
            return;
        }
        await hooks.createNewJob();
        if (!String(hooks.jobInfo.job_id || '').trim() || String(hooks.jobInfo.job_id) === 'default_job') {
            throw new Error('自动创建 Job 失败');
        }
    }

    async function processFolderFiles(hooks, inputFiles) {
        const files = Array.from(inputFiles || []).filter((file) => normalizedRelativePath(file));
        if (!files.length) {
            throw new Error('未读取到任何文件');
        }
        hooks.lightweightExtensionTestStatus.value = '正在校验目录结构...';
        const rootName = extractRootName(files);
        const fixed = splitFixedStructure(files);
        hooks.lightweightExtensionTestStatus.value = '正在确保 Job 可用...';
        await ensureJob(hooks);
        hooks.lightweightExtensionTestStatus.value = '正在解析运行环境...';
        const envResult = await resolveRuntimeEnv(files);
        hooks.extensionBuild.runtimeEnv = envResult.runtime_env || 'test4py311';
        console.log(
            '[lightWeightExtensionTest] ✓ 选定环境: ' + hooks.extensionBuild.runtimeEnv,
            '| 原因: ' + (envResult.reason || 'unknown'),
            '| 兜底: ' + (envResult.fallback ? '是' : '否'),
            envResult.matches ? '| 候选: ' + JSON.stringify(envResult.matches.map(m => m.env + '(py:' + (m.python_hits || []).join(',') + ' r:' + (m.r_hits || []).join(',') + ')')) : '',
        );
        hooks.lightweightExtensionTestStatus.value = '正在镜像导入当前 Job...';
        await importFolderToJob(hooks, rootName, files);
        hooks.extensionBuild.displayName = rootName;
        hooks.extensionBuild.command = 'bash run.sh';
        hooks.extensionBuild.codeFiles = hooks.appendExtensionFiles([], fixed.codeFiles);
        hooks.extensionBuild.dataFiles = hooks.appendExtensionFiles([], fixed.dataFiles);
        hooks.extensionBuild.dataPaths = '';
        hooks.lightweightExtensionTestStatus.value = `运行环境 ${hooks.extensionBuild.runtimeEnv} 已确定，正在触发 upload...`;
        await hooks.buildLightweightExtensionStage();
        hooks.lightweightExtensionTestStatus.value = '已开始 upload，系统正在自动轮询并等待候选卡。';
    }

    async function readEntry(entry, basePath) {
        if (entry.isFile) {
            return new Promise((resolve) => {
                entry.file((file) => {
                    Object.defineProperty(file, 'webkitRelativePath', {
                        value: basePath ? basePath + '/' + entry.name : entry.name,
                        writable: false,
                    });
                    resolve([file]);
                });
            });
        }
        if (entry.isDirectory) {
            const reader = entry.createReader();
            const entries = await new Promise((resolve) => {
                reader.readEntries(resolve);
            });
            const subPath = basePath ? basePath + '/' + entry.name : entry.name;
            const nested = await Promise.all(entries.map((e) => readEntry(e, subPath)));
            return nested.flat();
        }
        return [];
    }

    async function readDroppedFiles(dataTransfer) {
        if (!dataTransfer || !dataTransfer.items) {
            return Array.from(dataTransfer?.files || []);
        }
        const items = Array.from(dataTransfer.items);
        const entries = items
            .map((item) => item.webkitGetAsEntry && item.webkitGetAsEntry())
            .filter(Boolean);
        if (!entries.length) {
            return Array.from(dataTransfer.files || []);
        }
        const results = await Promise.all(entries.map((entry) => readEntry(entry, '')));
        return results.flat();
    }

    function mountApi() {
        window.LightWeightExtensionTest = {
            async handleDrop(hooks, event) {
                try {
                    const files = await readDroppedFiles(event?.dataTransfer);
                    await processFolderFiles(hooks, files);
                } catch (error) {
                    const message = `失败：${error.message || '目录处理失败'}`;
                    hooks.lightweightExtensionTestStatus.value = message;
                    notifyError(message);
                }
            },
            async handlePick(hooks, event) {
                const files = event?.target?.files || [];
                try {
                    await processFolderFiles(hooks, files);
                } catch (error) {
                    const message = `失败：${error.message || '目录处理失败'}`;
                    hooks.lightweightExtensionTestStatus.value = message;
                    notifyError(message);
                } finally {
                    if (event?.target) {
                        event.target.value = '';
                    }
                }
            },
            openPicker() {
                const input = document.getElementById('lightweight-extension-test-folder-input');
                if (input) {
                    input.click();
                }
            },
        };
    }

    mountApi();
})();