import type { UnlinkedBookData, PotentialMatchData } from './types/api';

async function loadUnlinkedBooks(): Promise<void> {
    const token = localStorage.getItem('token');
    if (!token) return;

    try {
        const response = await fetch('/api/sync/unlinked-books', {
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (response.ok) {
            const data = await response.json();
            renderUnlinkedBooks(data.unlinked || []);
        }
    } catch (error) {
        console.error('Failed to load unlinked books:', error);
    }
}

function renderUnlinkedBooks(books: UnlinkedBookData[]): void {
    const container = document.getElementById('unlinked-books-list');
    if (!container) return;

    if (books.length === 0) {
        container.innerHTML = '<p class="text-center p-4" style="color: var(--text-secondary)">No unlinked books</p>';
        return;
    }

    container.innerHTML = books.map(book => `
        <div class="p-4 rounded-lg border mb-2" style="background-color: var(--bg-secondary); border-color: var(--border)">
            <div class="flex justify-between items-start">
                <div>
                    <h3 class="font-medium" style="color: var(--text-primary)">${book.title_from_device}</h3>
                    <p class="text-sm" style="color: var(--text-secondary)">${book.device_name} (${book.device_type})</p>
                    <p class="text-xs" style="color: var(--text-secondary)">${book.file_path}</p>
                    <p class="text-xs mt-1" style="color: var(--text-secondary)">Confidence: ${Math.round(book.confidence_score * 100)}%</p>
                </div>
                <div class="flex space-x-2">
                    <button onclick="window.showMatchModal('${book.progress_id}')" class="btn-primary px-3 py-1 rounded text-sm">Link</button>
                </div>
            </div>
            ${book.potential_matches && book.potential_matches.length > 0 ? `
            <div class="mt-3 pt-3 border-t" style="border-color: var(--border)">
                <p class="text-xs font-medium mb-2" style="color: var(--text-secondary)">Potential Matches:</p>
                ${book.potential_matches.slice(0, 3).map(match => `
                    <div class="flex justify-between items-center p-2 rounded mb-1" style="background-color: var(--bg-primary)">
                        <div>
                            <p class="text-sm" style="color: var(--text-primary)">${match.title}</p>
                            <p class="text-xs" style="color: var(--text-secondary)">${match.author} (${Math.round(match.confidence * 100)}%)</p>
                        </div>
                        <button onclick="window.linkBook('${book.progress_id}', '${match.media_item_id}')" class="btn-secondary px-2 py-1 rounded text-xs">Link</button>
                    </div>
                `).join('')}
            </div>
            ` : ''}
        </div>
    `).join('');
}

async function linkBook(progressId: string, mediaItemId: string): Promise<void> {
    const token = localStorage.getItem('token');
    if (!token) return;

    try {
        const response = await fetch('/api/sync/link-book', {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ progress_id: progressId, media_item_id: mediaItemId })
        });

        if (response.ok) {
            if ((window as any).showToast?.success) {
                (window as any).showToast.success('Book linked successfully');
            }
            loadUnlinkedBooks();
        } else {
            const error = await response.json();
            if ((window as any).showToast?.error) {
                (window as any).showToast.error(error.error || 'Failed to link book');
            }
        }
    } catch (error) {
        console.error('Failed to link book:', error);
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Failed to link book');
        }
    }
}

async function autoLinkBooks(): Promise<void> {
    const token = localStorage.getItem('token');
    if (!token) return;

    if (!confirm('Auto-link all books with high confidence matches?')) return;

    try {
        const response = await fetch('/api/sync/auto-link', {
            method: 'POST',
            headers: {
                'Authorization': `Bearer ${token}`,
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ confidence_threshold: 0.9 })
        });

        if (response.ok) {
            const data = await response.json();
            if ((window as any).showToast?.success) {
                (window as any).showToast.success(`Auto-linked ${data.linked_count || 0} books`);
            }
            loadUnlinkedBooks();
        }
    } catch (error) {
        console.error('Failed to auto-link:', error);
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Failed to auto-link books');
        }
    }
}

async function getSuggestions(progressId: string): Promise<void> {
    const token = localStorage.getItem('token');
    if (!token) return;

    try {
        const response = await fetch(`/api/sync/suggestions/${progressId}`, {
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (response.ok) {
            const suggestions = await response.json();
            showSuggestionsModal(progressId, suggestions);
        }
    } catch (error) {
        console.error('Failed to get suggestions:', error);
    }
}

function showSuggestionsModal(progressId: string, suggestions: PotentialMatchData[]): void {
    const modal = document.getElementById('match-modal');
    const content = document.getElementById('match-modal-content');

    if (!modal || !content) return;

    content.innerHTML = `
        <div class="p-4">
            <h3 class="font-medium mb-4" style="color: var(--text-primary)">Select a match</h3>
            <div class="space-y-2">
                ${suggestions.map(s => `
                    <div class="p-3 rounded border cursor-pointer hover:border-opacity-50"
                         style="background-color: var(--bg-primary); border-color: var(--border)"
                         onclick="window.linkBook('${progressId}', '${s.media_item_id}'); window.hideMatchModal();">
                        <p class="font-medium" style="color: var(--text-primary)">${s.title}</p>
                        <p class="text-sm" style="color: var(--text-secondary)">${s.author}</p>
                        <p class="text-xs" style="color: var(--text-secondary)">${Math.round(s.confidence * 100)}% match</p>
                    </div>
                `).join('')}
            </div>
            <button onclick="window.hideMatchModal()" class="mt-4 btn-secondary w-full py-2 rounded">Cancel</button>
        </div>
    `;

    modal.classList.remove('hidden');
}

function hideMatchModal(): void {
    const modal = document.getElementById('match-modal');
    if (modal) {
        modal.classList.add('hidden');
    }
}

(window as any).loadUnlinkedBooks = loadUnlinkedBooks;
(window as any).linkBook = linkBook;
(window as any).autoLinkBooks = autoLinkBooks;
(window as any).getSuggestions = getSuggestions;
(window as any).showSuggestionsModal = showSuggestionsModal;
(window as any).hideMatchModal = hideMatchModal;