// Response Wall JavaScript

let currentCampaignSlug = null;
let currentOffset = 0;
let currentSort = 'recent';
let currentLevel = '';
const LIMIT = 20;

// Initialize
document.addEventListener('DOMContentLoaded', () => {
    console.log('Response Wall: Initializing...');
    
    // Get campaign slug from URL if present
    const urlParams = new URLSearchParams(window.location.search);
    currentCampaignSlug = urlParams.get('campaign');
    
    console.log('Campaign slug:', currentCampaignSlug);
    
    if (!currentCampaignSlug) {
        showError('No campaign specified');
        return;
    }

    // Load initial data
    loadResponseStats();
    loadResponses(true);

    // Set up event listeners
    document.getElementById('sort-select').addEventListener('change', (e) => {
        currentSort = e.target.value;
        loadResponses(true);
    });

    document.getElementById('level-filter').addEventListener('change', (e) => {
        currentLevel = e.target.value;
        loadResponses(true);
    });

    const submitBtn = document.getElementById('submit-response-btn');
    console.log('Submit button found:', !!submitBtn);
    if (submitBtn) {
        submitBtn.addEventListener('click', () => {
            console.log('Submit button clicked');
            openSubmitModal();
        });
    }
    
    // Use event delegation for empty state button since it's dynamically shown
    document.addEventListener('click', (e) => {
        if (e.target.id === 'empty-state-submit-btn') {
            console.log('Empty state button clicked');
            openSubmitModal();
        }
    });
    
    const modalCloseBtn = document.getElementById('modal-close-btn');
    if (modalCloseBtn) {
        modalCloseBtn.addEventListener('click', closeSubmitModal);
    }
    
    const cancelBtn = document.getElementById('cancel-submit-btn');
    if (cancelBtn) {
        cancelBtn.addEventListener('click', closeSubmitModal);
    }
    
    const loadMoreBtn = document.getElementById('load-more-btn');
    if (loadMoreBtn) {
        loadMoreBtn.addEventListener('click', loadMoreResponses);
    }
    
    const form = document.getElementById('submit-response-form');
    if (form) {
        form.addEventListener('submit', handleSubmitResponse);
    }
    
    console.log('Response Wall: Initialization complete');
});

// Load response statistics
async function loadResponseStats() {
    try {
        const response = await fetch(`/api/campaigns/${currentCampaignSlug}/response-stats`);
        const data = await response.json();

        if (data.success) {
            document.getElementById('stat-total-responses').textContent = data.stats.totalResponses;
            document.getElementById('stat-verified').textContent = data.stats.verifiedResponses;
            document.getElementById('stat-upvotes').textContent = data.stats.totalUpvotes;
            document.getElementById('stats-banner').style.display = 'flex';
        }
    } catch (error) {
        console.error('Error loading stats:', error);
    }
}

// Load responses
async function loadResponses(reset = false) {
    if (reset) {
        currentOffset = 0;
        document.getElementById('responses-container').innerHTML = '';
    }

    showLoading(true);

    try {
        const params = new URLSearchParams({
            sort: currentSort,
            level: currentLevel,
            offset: currentOffset,
            limit: LIMIT
        });

        const response = await fetch(`/api/campaigns/${currentCampaignSlug}/responses?${params}`);
        const data = await response.json();

        showLoading(false);

        if (data.success && data.responses.length > 0) {
            renderResponses(data.responses);
            
            // Show/hide load more button
            if (data.pagination.hasMore) {
                document.getElementById('load-more-container').style.display = 'block';
            } else {
                document.getElementById('load-more-container').style.display = 'none';
            }
        } else if (reset) {
            showEmptyState();
        }
    } catch (error) {
        showLoading(false);
        showError('Failed to load responses');
        console.error('Error loading responses:', error);
    }
}

// Render responses
function renderResponses(responses) {
    const container = document.getElementById('responses-container');
    
    responses.forEach(response => {
        const card = createResponseCard(response);
        container.appendChild(card);
    });
}

// Create response card element
function createResponseCard(response) {
    const card = document.createElement('div');
    card.className = 'response-card';
    card.dataset.responseId = response.id;

    const createdDate = new Date(response.created_at).toLocaleDateString('en-US', {
        year: 'numeric',
        month: 'short',
        day: 'numeric'
    });

    let badges = `<span class="badge badge-level">${escapeHtml(response.representative_level)}</span>`;
    badges += `<span class="badge badge-type">${escapeHtml(response.response_type)}</span>`;
    if (response.is_verified) {
        badges = `<span class="badge badge-verified">✓ Verified</span>` + badges;
    }

    let submittedBy = 'Anonymous';
    if (!response.is_anonymous && response.submitted_by_name) {
        submittedBy = escapeHtml(response.submitted_by_name);
    }

    let userCommentHtml = '';
    if (response.user_comment) {
        userCommentHtml = `
            <div class="user-comment">
                <span class="user-comment-label">Constituent's Comment:</span>
                ${escapeHtml(response.user_comment)}
            </div>
        `;
    }

    let screenshotHtml = '';
    if (response.screenshot_url) {
        screenshotHtml = `
            <div class="response-screenshot">
                <img src="${escapeHtml(response.screenshot_url)}" 
                     alt="Response screenshot" 
                     data-image-url="${escapeHtml(response.screenshot_url)}"
                     class="screenshot-image">
            </div>
        `;
    }

    const upvoteClass = response.hasUpvoted ? 'upvoted' : '';

    card.innerHTML = `
        <div class="response-header">
            <div class="response-rep-info">
                <h3>${escapeHtml(response.representative_name)}</h3>
                <div class="rep-meta">
                    ${response.representative_title ? `<span>${escapeHtml(response.representative_title)}</span>` : ''}
                    <span>${createdDate}</span>
                </div>
            </div>
            <div class="response-badges">
                ${badges}
            </div>
        </div>

        <div class="response-content">
            <div class="response-text">${escapeHtml(response.response_text)}</div>
            ${userCommentHtml}
            ${screenshotHtml}
        </div>

        <div class="response-footer">
            <div class="response-meta">
                Submitted by ${submittedBy}
            </div>
            <div class="response-actions">
                <button class="upvote-btn ${upvoteClass}" data-response-id="${response.id}">
                    <span class="upvote-icon">👍</span>
                    <span class="upvote-count">${response.upvote_count || 0}</span>
                </button>
            </div>
        </div>
    `;

    // Add event listener for upvote button
    const upvoteBtn = card.querySelector('.upvote-btn');
    upvoteBtn.addEventListener('click', function() {
        toggleUpvote(response.id, this);
    });

    // Add event listener for screenshot image if present
    const screenshotImg = card.querySelector('.screenshot-image');
    if (screenshotImg) {
        screenshotImg.addEventListener('click', function() {
            viewImage(this.dataset.imageUrl);
        });
    }

    return card;
}

// Toggle upvote
async function toggleUpvote(responseId, button) {
    const isUpvoted = button.classList.contains('upvoted');
    const url = `/api/responses/${responseId}/upvote`;

    try {
        const response = await fetch(url, {
            method: isUpvoted ? 'DELETE' : 'POST',
            headers: {
                'Content-Type': 'application/json'
            }
        });

        const data = await response.json();

        if (data.success) {
            // Update button state
            button.classList.toggle('upvoted');
            button.querySelector('.upvote-count').textContent = data.upvoteCount;
            
            // Reload stats
            loadResponseStats();
        } else {
            showError(data.error || 'Failed to update upvote');
        }
    } catch (error) {
        console.error('Error toggling upvote:', error);
        showError('Failed to update upvote');
    }
}

// Load more responses
function loadMoreResponses() {
    currentOffset += LIMIT;
    loadResponses(false);
}

// Open submit modal
function openSubmitModal() {
    console.log('openSubmitModal called');
    const modal = document.getElementById('submit-modal');
    if (modal) {
        modal.style.display = 'block';
        console.log('Modal displayed');
    } else {
        console.error('Modal element not found');
    }
}

// Close submit modal
function closeSubmitModal() {
    document.getElementById('submit-modal').style.display = 'none';
    document.getElementById('submit-response-form').reset();
}

// Handle response submission
async function handleSubmitResponse(e) {
    e.preventDefault();

    const formData = new FormData(e.target);

    try {
        const response = await fetch(`/api/campaigns/${currentCampaignSlug}/responses`, {
            method: 'POST',
            body: formData
        });

        const data = await response.json();

        if (data.success) {
            showSuccess(data.message || 'Response submitted successfully! It will appear after moderation.');
            closeSubmitModal();
            // Don't reload responses since submission is pending approval
        } else {
            showError(data.error || 'Failed to submit response');
        }
    } catch (error) {
        console.error('Error submitting response:', error);
        showError('Failed to submit response');
    }
}

// View image in modal/new tab
function viewImage(url) {
    window.open(url, '_blank');
}

// Utility functions
function showLoading(show) {
    document.getElementById('loading').style.display = show ? 'block' : 'none';
}

function showEmptyState() {
    document.getElementById('empty-state').style.display = 'block';
    document.getElementById('responses-container').innerHTML = '';
    document.getElementById('load-more-container').style.display = 'none';
}

function showError(message) {
    // Simple alert for now - could integrate with existing error display system
    alert('Error: ' + message);
}

function showSuccess(message) {
    // Simple alert for now - could integrate with existing success display system
    alert(message);
}

function escapeHtml(text) {
    if (!text) return '';
    const div = document.createElement('div');
    div.textContent = text;
    return div.innerHTML;
}

// Close modal when clicking outside
window.onclick = function(event) {
    const modal = document.getElementById('submit-modal');
    if (event.target === modal) {
        closeSubmitModal();
    }
};