// editor.js - 编辑器增强

document.addEventListener('DOMContentLoaded', function () {
    const uploadBtn = document.getElementById('uploadImageBtn');
    const fileInput = document.getElementById('imageFileInput');
    const markdownTextarea = document.getElementById('markdownContent');
    const statusDiv = document.getElementById('uploadStatus');

    if (!uploadBtn || !fileInput || !markdownTextarea) return;

    // 点击按钮触发文件选择
    uploadBtn.addEventListener('click', function () {
        fileInput.click();
    });

    fileInput.addEventListener('change', function () {
        const file = fileInput.files[0];
        if (!file) return;

        // 显示上传中
        statusDiv.textContent = '上传中...';
        uploadBtn.disabled = true;

        const formData = new FormData();
        formData.append('image', file);

        fetch('/editor/upload-image', {
            method: 'POST',
            body: formData
        })
        .then(response => response.json())
        .then(data => {
            if (data.success) {
                // 插入 Markdown 到光标位置
                const start = markdownTextarea.selectionStart;
                const end = markdownTextarea.selectionEnd;
                const before = markdownTextarea.value.substring(0, start);
                const after = markdownTextarea.value.substring(end);
                markdownTextarea.value = before + data.markdown + '\n' + after;
                // 移动光标到插入之后
                markdownTextarea.selectionStart = markdownTextarea.selectionEnd = start + data.markdown.length + 1;
                markdownTextarea.focus();
                statusDiv.textContent = '图片已插入';
            } else {
                statusDiv.textContent = '上传失败: ' + (data.error || '未知错误');
            }
        })
        .catch(err => {
            statusDiv.textContent = '上传错误: ' + err.message;
        })
        .finally(() => {
            uploadBtn.disabled = false;
            fileInput.value = ''; // 以便再次选择同一文件
        });
    });
});