// 导出数据
document.getElementById('export').addEventListener('click', async () => {
    const { aliases } = await chrome.storage.local.get('aliases');
    const blob = new Blob([JSON.stringify(aliases || {}, null, 2)], { type: 'application/json' });
    const url = URL.createObjectURL(blob);

    const timestamp = new Date()
        .toLocaleString('sv-SE')  // ISO-like 格式
        .replace(' ', '_')
        .replace(/:/g, '-');      // 避免非法文件名

    const a = document.createElement('a');
    a.href = url;
    a.download = `teams-alias-${timestamp}.json`;
    a.click();

    URL.revokeObjectURL(url);
});

// 通用导入处理函数
function handleFileImport(mode = 'overwrite') {
    const fileInput = document.getElementById('fileInput');

    const handler = async (e) => {
        const file = e.target.files[0];
        if (!file) return;

        const reader = new FileReader();
        reader.onload = async function (event) {
            try {
                const importedData = JSON.parse(event.target.result);
                if (typeof importedData !== 'object' || importedData === null) {
                    alert('文件格式错误');
                    return;
                }

                const { aliases: existingAliases = {} } = await chrome.storage.local.get('aliases');

                const updatedAliases = (mode === 'merge')
                    ? { ...importedData, ...existingAliases }  // 保留现有的不被导入的覆盖
                    : importedData;

                await chrome.storage.local.set({ aliases: updatedAliases });

                alert(mode === 'merge' ? '导入并合并成功' : '导入成功');
            } catch (err) {
                alert('无法解析 JSON 文件');
            } finally {
                fileInput.removeEventListener('change', handler);
                fileInput.value = ''; // 重置 input 以便后续重复导入同一文件
            }
        };
        reader.readAsText(file);
    };

    fileInput.addEventListener('change', handler, { once: true });
    fileInput.click();
}

// 导入（覆盖）
document.getElementById('import').addEventListener('click', () => handleFileImport('overwrite'));

// 更新导入（合并）
document.getElementById('update-import').addEventListener('click', () => handleFileImport('merge'));