// public/dashboard/js/api.js
// Centralized REST API client for Btekno Retribusi Admin Dashboard

import { API_CONFIG } from './config.js';

// Export API_CONFIG untuk digunakan di file lain
export { API_CONFIG };

const API_BASE_URL = API_CONFIG.BASE_URL;

function getToken() {
  return localStorage.getItem('token') || '';
}

async function apiRequest(path, options = {}) {
  const url = path.startsWith('http') ? path : `${API_BASE_URL}${path}`;

  const headers = {
    'Content-Type': 'application/json',
    // X-API-KEY dari konfigurasi backend (RETRIBUSI_API_KEY)
    'X-API-KEY': API_CONFIG.API_KEY,
    ...(options.headers || {})
  };

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

  const config = {
    method: options.method || 'GET',
    headers,
    body: options.body ? JSON.stringify(options.body) : null
  };

  console.log('[API] Request:', { method: config.method, url, headers: { ...headers, Authorization: token ? 'Bearer ***' : 'none' } });

  try {
    const res = await fetch(url, config);
    console.log('[API] Response status:', res.status, res.statusText);

    if (res.status === 401) {
      // Unauthorized → clear token & redirect to login
      localStorage.removeItem('token');
      localStorage.removeItem('user');
      // Cek apakah sudah di login page untuk menghindari redirect loop
      const currentPath = window.location.pathname.toLowerCase();
      const isLoginPage = currentPath.includes('index.html') || 
                          currentPath.includes('index.php') || 
                          currentPath === '/' || 
                          currentPath === '/index.html' ||
                          currentPath === '/index.php' ||
                          currentPath.endsWith('/') ||
                          currentPath === '';
      // Hanya redirect jika benar-benar di halaman dashboard, bukan di login page
      if (!isLoginPage && currentPath.includes('dashboard')) {
        window.location.href = '../index.html';
      }
      throw new Error('Unauthorized');
    }

    const text = await res.text();
    let json;
    try {
      json = text ? JSON.parse(text) : {};
    } catch (e) {
      json = { raw: text };
    }

    // Log response body untuk debug (khusus untuk summary endpoint)
    if (url.includes('/dashboard/summary') || url.includes('/summary/hourly') || url.includes('/by-category')) {
      console.log('[API] Response body for', url, ':', {
        textLength: text.length,
        jsonKeys: Object.keys(json || {}),
        jsonPreview: JSON.stringify(json).substring(0, 500),
        hasSuccess: json && 'success' in json,
        hasData: json && 'data' in json,
        totalCount: json?.total_count ?? json?.data?.total_count,
        totalAmount: json?.total_amount ?? json?.data?.total_amount
      });
    }

    if (!res.ok) {
      const msg = json.message || json.error || `HTTP ${res.status}`;
      throw new Error(msg);
    }

    // Some endpoints might wrap data as { success, data, ... }
    if (json && Object.prototype.hasOwnProperty.call(json, 'success') &&
        Object.prototype.hasOwnProperty.call(json, 'data')) {
      return json.data;
    }

    return json;
  } catch (err) {
    console.error('[API] Request failed:', { 
      url, 
      error: err,
      message: err.message,
      stack: err.stack 
    });
    
    // Tambahkan info lebih detail untuk "Failed to fetch"
    if (err.message === 'Failed to fetch' || err.message.includes('fetch')) {
      const detailedError = new Error(`Gagal terhubung ke API: ${url}. Pastikan backend API sudah running di ${API_BASE_URL}`);
      detailedError.originalError = err;
      throw detailedError;
    }
    
    throw err;
  }
}

// Helper untuk build query string dari object params
function buildQuery(params = {}) {
  const search = new URLSearchParams();
  Object.entries(params).forEach(([key, value]) => {
    if (value !== undefined && value !== null && value !== '') {
      // Pastikan value adalah string dan sudah di-encode dengan benar
      let stringValue = String(value).trim();
      
      // Validasi khusus untuk parameter date: harus format YYYY-MM-DD
      if (key === 'date' || key === 'start_date' || key === 'end_date') {
        // Validasi format tanggal
        if (!/^\d{4}-\d{2}-\d{2}$/.test(stringValue)) {
          console.error('[API] buildQuery - Invalid date format:', stringValue);
          // Coba normalisasi jika mungkin
          const dateObj = new Date(stringValue);
          if (!isNaN(dateObj.getTime())) {
            const year = dateObj.getFullYear();
            const month = String(dateObj.getMonth() + 1).padStart(2, '0');
            const day = String(dateObj.getDate()).padStart(2, '0');
            stringValue = `${year}-${month}-${day}`;
            console.warn('[API] buildQuery - Date normalized to:', stringValue);
          } else {
            console.error('[API] buildQuery - Cannot normalize date, skipping:', stringValue);
            return; // Skip parameter ini jika tidak valid
          }
        }
        
        // Validasi bahwa tanggal valid (tidak ada 2025-13-45)
        const [year, month, day] = stringValue.split('-').map(Number);
        const dateObj = new Date(year, month - 1, day);
        if (dateObj.getFullYear() !== year || dateObj.getMonth() !== month - 1 || dateObj.getDate() !== day) {
          console.error('[API] buildQuery - Invalid date values:', { year, month, day });
          return; // Skip parameter ini jika tidak valid
        }
        
        console.log('[API] buildQuery - Date param validated:', {
          key,
          originalValue: value,
          stringValue: stringValue,
          encoded: stringValue, // URLSearchParams akan encode otomatis
          year: year,
          month: month,
          day: day
        });
      }
      
      search.append(key, stringValue);
    }
  });
  const qs = search.toString();
  return qs ? `?${qs}` : '';
}

// Typed helpers

export async function apiLogin(username, password) {
  return apiRequest('/auth/v1/login', {
    method: 'POST',
    body: { username, password }
  });
}

export async function apiGetLocations(params = {}) {
  // Handle pagination: { page, limit }
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/frontend/locations${qs}`);
}

export async function apiGetGates(locationCode, params = {}) {
  // Handle pagination: { page, limit, location_code }
  const queryParams = { ...params };
  if (locationCode) queryParams.location_code = locationCode;
  const qs = buildQuery(queryParams);
  return apiRequest(`/retribusi/v1/frontend/gates${qs}`);
}

export async function apiGetSummary({ date, locationCode, gateCode }) {
  const qs = buildQuery({
    date,
    location_code: locationCode,
    gate_code: gateCode
  });
  const url = `/retribusi/v1/dashboard/summary${qs}`;
  console.log('[API] apiGetSummary - URL:', url, 'Params:', { date, locationCode, gateCode });
  return apiRequest(url);
}

export async function apiGetDaily({ startDate, endDate, locationCode }) {
  const qs = buildQuery({
    start_date: startDate,
    end_date: endDate,
    location_code: locationCode
  });
  return apiRequest(`/retribusi/v1/dashboard/daily${qs}`);
}

export async function apiGetByCategory({ date, locationCode, gateCode }) {
  const qs = buildQuery({
    date,
    location_code: locationCode,
    gate_code: gateCode
  });
  const url = `/retribusi/v1/dashboard/by-category${qs}`;
  console.log('[API] apiGetByCategory - URL:', url, 'Params:', { date, locationCode, gateCode });
  return apiRequest(url);
}

// Ringkasan global harian (daily_summary)
export async function apiGetSummaryDaily(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/summary/daily${qs}`);
}

// Ringkasan per jam (hourly_summary)
export async function apiGetSummaryHourly(params = {}) {
  const qs = buildQuery(params);
  const url = `/retribusi/v1/summary/hourly${qs}`;
  console.log('[API] apiGetSummaryHourly - URL:', url, 'Params:', params);
  return apiRequest(url);
}

// Snapshot realtime (untuk panel live / TV wall)
export async function apiGetRealtimeSnapshot(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/realtime/snapshot${qs}`);
}

// Entry events list (raw events dari mesin YOLO)
// GET /retribusi/v1/frontend/entry-events
// Parameters: page, limit, location_code, gate_code, category, start_date, end_date
export async function apiGetEntryEvents(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/frontend/entry-events${qs}`);
}

// Realtime events list (history untuk SSE)
// GET /retribusi/v1/realtime/events
// Parameters: page, limit, location_code, gate_code, category, start_date, end_date
export async function apiGetRealtimeEvents(params = {}) {
  const qs = buildQuery(params);
  return apiRequest(`/retribusi/v1/realtime/events${qs}`);
}

// Alias untuk backward compatibility
export async function apiGetEvents(params = {}) {
  return apiGetEntryEvents(params);
}

// Catatan: realtime SSE /retribusi/v1/realtime/stream akan diakses langsung via EventSource,
// bukan lewat fetch/apiRequest karena menggunakan Server-Sent Events (SSE).

// Test function untuk debug - bandingkan URL yang dihasilkan untuk tanggal berbeda
// Bisa dipanggil dari browser console: window.testDateUrls('2025-12-31', '2026-01-01')
if (typeof window !== 'undefined') {
  window.testDateUrls = function(date1, date2) {
    console.log('=== TEST: Membandingkan URL untuk tanggal berbeda ===');
    
    const testParams = {
      date: date1 || '2025-12-31',
      locationCode: '',
      gateCode: ''
    };
    
    const testParams2 = {
      date: date2 || '2026-01-01',
      locationCode: '',
      gateCode: ''
    };
    
    console.log('\n--- Tanggal 1:', testParams.date, '---');
    const qs1 = buildQuery(testParams);
    console.log('Query string:', qs1);
    console.log('Full URL:', `${API_CONFIG.BASE_URL}/retribusi/v1/dashboard/summary${qs1}`);
    
    console.log('\n--- Tanggal 2:', testParams2.date, '---');
    const qs2 = buildQuery(testParams2);
    console.log('Query string:', qs2);
    console.log('Full URL:', `${API_CONFIG.BASE_URL}/retribusi/v1/dashboard/summary${qs2}`);
    
    console.log('\n--- Perbandingan ---');
    console.log('Query string sama?', qs1 === qs2);
    console.log('Date param sama?', testParams.date === testParams2.date);
    console.log('Date length sama?', testParams.date.length === testParams2.date.length);
    
    // Test URLSearchParams parsing
    const params1 = new URLSearchParams(qs1.substring(1));
    const params2 = new URLSearchParams(qs2.substring(1));
    console.log('Parsed date 1:', params1.get('date'));
    console.log('Parsed date 2:', params2.get('date'));
    console.log('Parsed dates sama?', params1.get('date') === params2.get('date'));
    
    return {
      date1: testParams.date,
      date2: testParams2.date,
      url1: `${API_CONFIG.BASE_URL}/retribusi/v1/dashboard/summary${qs1}`,
      url2: `${API_CONFIG.BASE_URL}/retribusi/v1/dashboard/summary${qs2}`,
      qs1,
      qs2,
      areEqual: qs1 === qs2
    };
  };
}