/**
 * Comment API Module
 * Handles server communication
 */

export class CommentApi {
    /**
     * Post a new comment
     * @param {string} url - The action URL
     * @param {FormData} formData - The form data
     * @returns {Promise<{success: boolean, html?: string, msg?: string, commentCount?: string}>}
     */
    async postComment(url, formData) {
        try {
            const response = await fetch(url, {
                method: 'POST',
                body: formData,
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            });

            const commentCount = response.headers.get('commentCount');
            
            // Check content type to determine if JSON or HTML
            const contentType = response.headers.get('content-type');
            if (contentType && contentType.includes('application/json')) {
                const data = await response.json();
                return { success: false, msg: data.msg || '提交失败' };
            }

            const html = await response.text();
            
            // In the legacy controller, it might return a JSON with {success: false} on error, 
            // or HTML on success. The old JS handled this by checking property "success".
            // Since we receive text, we might need to try parsing it as JSON first if it looks like it.
            try {
                const json = JSON.parse(html);
                if (json && json.success === false) {
                    return { success: false, msg: json.msg };
                }
            } catch (e) {
                // Not JSON, assume HTML success
            }

            return { success: true, html, commentCount };

        } catch (error) {
            console.error('Comment Post Error:', error);
            return { success: false, msg: '网络请求失败' };
        }
    }

    /**
     * Load comments (Refresh or Paging)
     * @param {string} url - The URL to fetch
     * @returns {Promise<{success: boolean, html?: string, commentCount?: string}>}
     */
    async loadComments(url) {
        try {
            const response = await fetch(url, {
                method: 'GET',
                headers: {
                    'X-Requested-With': 'XMLHttpRequest'
                }
            });

            if (!response.ok) {
                throw new Error(`HTTP error! status: ${response.status}`);
            }

            const commentCount = response.headers.get('commentCount');
            const html = await response.text();

            return { success: true, html, commentCount };

        } catch (error) {
            console.error('Comment Load Error:', error);
            return { success: false };
        }
    }
}