import type { QueueItem } from './queue';

export async function createUpload(
  url: string,
  it: QueueItem,
  deviceId: string,
  onProgress?: (percent: number) => void
): Promise<any> {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();
    xhr.open('POST', url, true);
    xhr.setRequestHeader('X-Device-Id', deviceId);
    const form = new FormData();
    form.append('photo', it.blob, it.fileName);
    if (it.emotion_id) form.append('emotion_id', String(it.emotion_id));
    if (it.task_id) form.append('task_id', String(it.task_id));
    xhr.upload.onprogress = (ev) => {
      if (onProgress && ev.lengthComputable) {
        const pct = Math.min(100, Math.round((ev.loaded / ev.total) * 100));
        onProgress(pct);
      }
    };
    xhr.onload = () => {
      if (xhr.status >= 200 && xhr.status < 300) {
        try { resolve(JSON.parse(xhr.responseText)); } catch { resolve({}); }
      } else {
        reject(new Error('upload failed'));
      }
    };
    xhr.onerror = () => reject(new Error('network error'));
    xhr.send(form);
  });
}