// BASE_URL configured via manifest.json or build-time env
// For production, update this to your actual server URL
const BASE_URL = 'http://172.31.12.249:18080/api/hss';

function getHeaders() {
  const token = uni.getStorageSync('token');
  return {
    'Authorization': token ? 'Bearer ' + token : '',
    'X-User-Role': 'STAFF',
    'Content-Type': 'application/json'
  };
}

function generateIdempotencyKey() {
  return 'idem-' + Date.now() + '-' + Math.random().toString(36).substr(2, 9);
}

function apiGet(path, params = {}) {
  return uni.request({ url: BASE_URL + path, method: 'GET', data: params, header: getHeaders() });
}

function apiPost(path, data = {}) {
  const headers = getHeaders();
  headers['Idempotency-Key'] = generateIdempotencyKey();
  return uni.request({ url: BASE_URL + path, method: 'POST', data, header: headers });
}

// ==================== GPS ====================

function getLocation() {
  return new Promise((resolve, reject) => {
    // #ifdef MP-WEIXIN
    uni.getLocation({ type: 'gcj02', success: resolve, fail: reject });
    // #endif
    // #ifdef APP-PLUS
    uni.getLocation({ type: 'gcj02', geocode: true, success: resolve, fail: reject });
    // #endif
  });
}

let trajectoryTimer = null;
function startTrajectory(workOrderId) {
  stopTrajectory();
  trajectoryTimer = setInterval(async () => {
    try {
      const loc = await getLocation();
      await apiPost('/gps/trajectory', {
        workOrderId, latitude: loc.latitude, longitude: loc.longitude, timestamp: new Date().toISOString()
      });
    } catch (e) {}
  }, 30000);
}
function stopTrajectory() {
  if (trajectoryTimer) { clearInterval(trajectoryTimer); trajectoryTimer = null; }
}

// ==================== 拍照 ====================

function chooseImage(count = 1) {
  return new Promise((resolve, reject) => {
    uni.chooseImage({
      count, sizeType: ['compressed'],
      // #ifdef MP-WEIXIN
      sourceType: ['camera'],
      // #endif
      // #ifdef APP-PLUS
      sourceType: ['camera', 'album'],
      // #endif
      success: resolve, fail: reject
    });
  });
}

// ==================== 文件上传 ====================

async function uploadEvidence(filePath, entityType, entityId) {
  const fileName = filePath.split('/').pop() || 'photo.jpg';
  const ft = fileName.endsWith('.mp4') ? 'VIDEO' : fileName.endsWith('.mp3') ? 'AUDIO' : 'PHOTO';

  const presignRes = await apiPost('/evidence/presign-upload', { fileName, fileType: ft, entityType, entityId });
  if (presignRes.data.code !== 200) throw new Error('PreSign failed');
  const { fileKey } = presignRes.data.data;

  return new Promise((resolve, reject) => {
    uni.uploadFile({
      url: BASE_URL + '/evidence/commit',
      filePath, name: 'file',
      formData: { fileKey, fileName, fileHash: '', fileSize: '0', contentType: 'image/jpeg' },
      header: getHeaders(),
      success: (r) => {
        try { resolve({ fileKey, response: JSON.parse(r.data) }); }
        catch (e) { resolve({ fileKey, response: r.data }); }
      },
      fail: reject
    });
  });
}

module.exports = {
  addWatermark,
  BASE_URL, apiGet, apiPost, generateIdempotencyKey,
  getLocation, startTrajectory, stopTrajectory,
  chooseImage, uploadEvidence,
};