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

    try {
        const response = await fetch('/api/libraries/scan', {
            method: 'POST',
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (response.ok) {
            if ((window as any).showToast?.success) {
                (window as any).showToast.success('Library scan started');
            }
        } else {
            const error = await response.json();
            if ((window as any).showToast?.error) {
                (window as any).showToast.error(error.error || 'Failed to start scan');
            }
        }
    } catch (error) {
        console.error('Scan error:', error);
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Failed to start library scan');
        }
    }
}

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

    try {
        const response = await fetch('/api/libraries/quick-scan', {
            method: 'POST',
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (response.ok) {
            if ((window as any).showToast?.success) {
                (window as any).showToast.success('Quick scan started');
            }
        } else {
            const error = await response.json();
            if ((window as any).showToast?.error) {
                (window as any).showToast.error(error.error || 'Failed to start quick scan');
            }
        }
    } catch (error) {
        console.error('Quick scan error:', error);
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Failed to start quick scan');
        }
    }
}

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

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

        if (response.ok) {
            const stats = await response.json();
            renderSystemStats(stats);
        }
    } catch (error) {
        console.error('Failed to load stats:', error);
    }
}

function renderSystemStats(stats: Record<string, unknown>): void {
    const container = document.getElementById('system-stats');
    if (!container) return;

    container.innerHTML = `
        <div class="grid grid-cols-2 md:grid-cols-4 gap-4">
            <div class="p-4 rounded-lg" style="background-color: var(--bg-secondary)">
                <p class="text-2xl font-bold" style="color: var(--text-primary)">${stats.total_books || 0}</p>
                <p class="text-sm" style="color: var(--text-secondary)">Total Books</p>
            </div>
            <div class="p-4 rounded-lg" style="background-color: var(--bg-secondary)">
                <p class="text-2xl font-bold" style="color: var(--text-primary)">${stats.total_users || 0}</p>
                <p class="text-sm" style="color: var(--text-secondary)">Users</p>
            </div>
            <div class="p-4 rounded-lg" style="background-color: var(--bg-secondary)">
                <p class="text-2xl font-bold" style="color: var(--text-primary)">${stats.total_devices || 0}</p>
                <p class="text-sm" style="color: var(--text-secondary)">Devices</p>
            </div>
            <div class="p-4 rounded-lg" style="background-color: var(--bg-secondary)">
                <p class="text-2xl font-bold" style="color: var(--text-primary)">${stats.total_libraries || 0}</p>
                <p class="text-sm" style="color: var(--text-secondary)">Libraries</p>
            </div>
        </div>
    `;
}

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

    try {
        const libsResp = await fetch('/api/libraries', {
            headers: { 'Authorization': `Bearer ${token}` }
        });

        if (!libsResp.ok) {
            throw new Error('Failed to get libraries');
        }

        const libsData = await libsResp.json();

        if (!libsData.data || libsData.data.length === 0) {
            if ((window as any).showToast?.error) {
                (window as any).showToast.error('No libraries found. Please create a library first.');
            }
            return;
        }

        const libraries = libsData.data;

        const jobs: string[] = [];
        const libraryNames: Record<string, string> = {};

        for (const lib of libraries) {
            const scanResp = await fetch(`/api/libraries/${lib.id}/scan`, {
                method: 'POST',
                headers: { 'Authorization': `Bearer ${token}` }
            });

            if (scanResp.ok) {
                const result = await scanResp.json();
                jobs.push(result.job_id);
                libraryNames[result.job_id] = lib.name;
            } else {
                console.error(`Failed to scan library: ${lib.name}`);
            }
        }

        if (jobs.length === 0) {
            if ((window as any).showToast?.error) {
                (window as any).showToast.error('Failed to start scan for any library');
            }
            return;
        }

        showScanProgress(jobs, libraryNames);

    } catch (error) {
        console.error('Scan error:', error);
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Failed to start scan: ' + (error as Error).message);
        }
    }
}

function showScanProgress(jobIds: string[], libraryNames: Record<string, string>): void {
    const container = document.getElementById('scan-progress-container') as HTMLElement;
    const list = document.getElementById('library-progress-list') as HTMLElement;

    if (!container || !list) return;

    container.classList.remove('hidden');
    container.classList.remove('opacity-0', '-translate-y-2.5');

    list.innerHTML = jobIds.map(jobId => `
        <div id="progress-${jobId}" class="p-3 rounded border"
             style="background-color: var(--bg-primary); border-color: var(--border);">
            <div class="flex justify-between items-center mb-2">
                <span class="font-medium" style="color: var(--text-primary)">
                    ${libraryNames[jobId]}
                </span>
                <span id="status-${jobId}" class="text-sm" style="color: var(--text-secondary)">
                    Pending...
                </span>
            </div>
            <div class="w-full bg-gray-700 rounded-full h-2">
                <div id="bar-${jobId}"
                     class="h-2 rounded-full transition-all duration-500"
                     style="width: 0%; background-color: var(--accent);">
                </div>
            </div>
        </div>
    `).join('');

    pollScanProgress(jobIds, libraryNames);
}

function pollScanProgress(jobIds: string[], _libraryNames: Record<string, string>): void {
    const token = localStorage.getItem('token');
    const startTime = Date.now();

    const interval = setInterval(async () => {
        let allComplete = true;
        let totalProgress = 0;
        let totalFiles = 0;
        let totalNewItems = 0;
        let totalErrors = 0;

        for (const jobId of jobIds) {
            try {
                const resp = await fetch(`/api/scanner/status/${jobId}`, {
                    headers: { 'Authorization': `Bearer ${token}` }
                });

                if (resp.ok) {
                    const status = await resp.json();

                    updateLibraryProgress(jobId, status);

                    totalProgress += status.progress || 0;
                    totalFiles += status.files_scanned || 0;
                    totalNewItems += status.new_items || 0;
                    totalErrors += status.errors || 0;

                    if (status.status !== 'completed' && status.status !== 'failed') {
                        allComplete = false;
                    }
                }
            } catch (error) {
                console.error(`Failed to poll job ${jobId}:`, error);
            }
        }

        const overallProgress = Math.round(totalProgress / jobIds.length);
        const progressBar = document.getElementById('scan-progress-bar') as HTMLElement;
        const progressText = document.getElementById('scan-progress-text') as HTMLElement;
        const statusText = document.getElementById('scan-status') as HTMLElement;

        if (progressBar) progressBar.style.width = overallProgress + '%';
        if (progressText) progressText.textContent = overallProgress + '%';

        const elapsed = Math.round((Date.now() - startTime) / 1000);
        if (!allComplete && statusText) {
            statusText.textContent = `Scanning... ${elapsed}s elapsed • ${totalFiles} files processed`;
        }

        if (allComplete) {
            clearInterval(interval);
            showScanResults(jobIds.length, totalFiles, totalNewItems, totalErrors, elapsed);
        }
    }, 2000);
}

function updateLibraryProgress(jobId: string, status: any): void {
    const bar = document.getElementById(`bar-${jobId}`) as HTMLElement;
    const statusText = document.getElementById(`status-${jobId}`) as HTMLElement;

    if (bar) {
        bar.style.width = (status.progress || 0) + '%';
    }

    if (statusText) {
        const statusMessages: Record<string, string> = {
            'pending': 'Pending...',
            'running': `Scanning... ${status.progress || 0}%`,
            'completed': `✓ Complete (${status.new_items || 0} items)`,
            'failed': `✗ Failed`
        };
        statusText.textContent = statusMessages[status.status] || status.status;
    }
}

function showScanResults(libCount: number, files: number, items: number, errors: number, elapsed: number): void {
    const resultsDiv = document.getElementById('scan-results') as HTMLElement;
    const contentDiv = document.getElementById('scan-results-content') as HTMLElement;

    if (!resultsDiv || !contentDiv) return;

    contentDiv.innerHTML = `
        <p>• ${libCount} librar${libCount === 1 ? 'y' : 'ies'} scanned</p>
        <p>• ${files} files processed</p>
        <p>• ${items} new items added</p>
        ${errors > 0 ? `<p style="color: var(--accent);">• ${errors} errors</p>` : ''}
        <p style="color: var(--text-secondary)">Completed in ${elapsed} seconds</p>
    `;

    resultsDiv.classList.remove('hidden');

    const statusText = document.getElementById('scan-status') as HTMLElement;
    if (statusText) statusText.textContent = 'Scan complete!';
}

function hideScanProgress(): void {
    const container = document.getElementById('scan-progress-container') as HTMLElement;
    if (container) container.classList.add('hidden');
}

(window as any).triggerLibraryScan = triggerLibraryScan;
(window as any).triggerQuickScan = triggerQuickScan;
(window as any).loadSystemStats = loadSystemStats;
(window as any).scanAllLibraries = scanAllLibraries;
(window as any).hideScanProgress = hideScanProgress;