interface ApiExplorerRequest {
    method: string;
    endpoint: string;
    headers: Record<string, string>;
    body?: string;
}

const requestHistory: ApiExplorerRequest[] = [];

function sendApiRequest(): void {
    const method = (document.getElementById('api-method') as HTMLSelectElement)?.value || 'GET';
    const endpoint = (document.getElementById('api-endpoint') as HTMLInputElement)?.value || '';
    const bodyText = (document.getElementById('api-body') as HTMLTextAreaElement)?.value || '';

    const token = localStorage.getItem('token');

    const headers: Record<string, string> = {
        'Content-Type': 'application/json'
    };

    if (token) {
        headers['Authorization'] = `Bearer ${token}`;
    }

    const request: ApiExplorerRequest = {
        method,
        endpoint,
        headers,
        body: bodyText || undefined
    };

    addToHistory(request);

    const startTime = performance.now();

    fetch(endpoint, {
        method,
        headers,
        body: bodyText || undefined
    })
    .then(async response => {
        const endTime = performance.now();
        const duration = Math.round(endTime - startTime);

        const responseText = await response.text();
        let responseData: unknown;
        try {
            responseData = JSON.parse(responseText);
        } catch {
            responseData = responseText;
        }

        displayResponse(response, responseData, duration);
        generateCurl(request);
    })
    .catch(error => {
        displayError(error);
    });
}

function displayResponse(response: Response, data: unknown, duration: number): void {
    const container = document.getElementById('api-response');
    if (!container) return;

    const statusColor = response.ok ? 'var(--accent)' : 'var(--error)';

    container.innerHTML = `
        <div class="mb-4">
            <span class="px-2 py-1 rounded text-sm" style="background-color: ${statusColor}; color: var(--bg-primary)">
                ${response.status} ${response.statusText}
            </span>
            <span class="text-sm ml-2" style="color: var(--text-secondary)">${duration}ms</span>
        </div>
        <pre class="p-4 rounded overflow-auto max-h-96" style="background-color: var(--bg-primary); color: var(--text-primary)">${JSON.stringify(data, null, 2)}</pre>
    `;
}

function displayError(error: Error): void {
    const container = document.getElementById('api-response');
    if (!container) return;

    container.innerHTML = `
        <div class="p-4 rounded" style="background-color: var(--bg-primary)">
            <p style="color: var(--error)">Error: ${error.message}</p>
        </div>
    `;
}

function generateCurl(request: ApiExplorerRequest): void {
    const container = document.getElementById('curl-command');
    if (!container) return;

    let curl = `curl -X ${request.method} '${request.endpoint}'`;

    Object.entries(request.headers).forEach(([key, value]) => {
        curl += ` \\\n  -H '${key}: ${value}'`;
    });

    if (request.body) {
        curl += ` \\\n  -d '${request.body}'`;
    }

    container.textContent = curl;
}

function addToHistory(request: ApiExplorerRequest): void {
    requestHistory.unshift(request);
    if (requestHistory.length > 20) {
        requestHistory.pop();
    }
    renderHistory();
}

function renderHistory(): void {
    const container = document.getElementById('request-history');
    if (!container) return;

    if (requestHistory.length === 0) {
        container.innerHTML = '<p class="text-sm p-2" style="color: var(--text-secondary)">No requests yet</p>';
        return;
    }

    container.innerHTML = requestHistory.slice(0, 10).map((req, i) => `
        <div class="p-2 rounded cursor-pointer hover:bg-opacity-50 transition-colors"
             style="background-color: var(--bg-secondary)"
             onclick="window.loadFromHistory(${i})">
            <span class="text-xs font-mono" style="color: ${req.method === 'GET' ? 'var(--accent)' : req.method === 'POST' ? 'var(--success)' : req.method === 'DELETE' ? 'var(--error)' : 'var(--text-primary)'}">${req.method}</span>
            <span class="text-xs ml-2" style="color: var(--text-secondary)">${req.endpoint}</span>
        </div>
    `).join('');
}

function loadFromHistory(index: number): void {
    const request = requestHistory[index];
    if (!request) return;

    const methodSelect = document.getElementById('api-method') as HTMLSelectElement;
    const endpointInput = document.getElementById('api-endpoint') as HTMLInputElement;
    const bodyInput = document.getElementById('api-body') as HTMLTextAreaElement;

    if (methodSelect) methodSelect.value = request.method;
    if (endpointInput) endpointInput.value = request.endpoint;
    if (bodyInput) bodyInput.value = request.body || '';
}

function copyCurl(): void {
    const curl = document.getElementById('curl-command')?.textContent;
    if (curl) {
        navigator.clipboard.writeText(curl);
        if ((window as any).showToast?.success) {
            (window as any).showToast.success('cURL copied to clipboard');
        }
    }
}

function formatJson(): void {
    const bodyInput = document.getElementById('api-body') as HTMLTextAreaElement;
    if (!bodyInput) return;

    try {
        const parsed = JSON.parse(bodyInput.value);
        bodyInput.value = JSON.stringify(parsed, null, 2);
    } catch {
        if ((window as any).showToast?.error) {
            (window as any).showToast.error('Invalid JSON');
        }
    }
}

(window as any).sendApiRequest = sendApiRequest;
(window as any).loadFromHistory = loadFromHistory;
(window as any).copyCurl = copyCurl;
(window as any).formatJson = formatJson;