/**
 * 报销附件：拍照/相册 → /attachments/upload（multipart，已在加密排除路径）
 * 返回附件对象列表（含 id），提交后需 bindAttachments
 */
import { API_BASE, TOKEN_KEY } from '@/config/api'

function parseBody(raw) {
  try {
    return JSON.parse(typeof raw === 'string' ? raw : String(raw || ''))
  } catch {
    return {}
  }
}

function getToken() {
  const raw = uni.getStorageSync(TOKEN_KEY)
  return typeof raw === 'string' ? raw.trim() : raw ? String(raw).trim() : ''
}

/**
 * @param {{ bizType?: string, bizId?: string|number, maxCount?: number, currentCount?: number }} opts
 * @returns {Promise<Array<{ id: string, fileName?: string, localPath?: string }>>}
 */
export async function chooseAndUploadBxAttachments(opts = {}) {
  const bizType = opts.bizType || 'reimburse_apply'
  const bizId = opts.bizId != null ? String(opts.bizId) : '0'
  const maxCount = opts.maxCount != null ? opts.maxCount : 6
  const currentCount = opts.currentCount || 0
  const remain = maxCount - currentCount
  if (remain <= 0) {
    uni.showToast({ title: `最多上传${maxCount}张`, icon: 'none' })
    return []
  }

  const choose = await new Promise((resolve) => {
    uni.chooseImage({
      count: remain,
      sizeType: ['compressed'],
      sourceType: ['album', 'camera'],
      success: (res) => resolve(res),
      fail: () => resolve(null)
    })
  })
  if (!choose?.tempFilePaths?.length) return []

  const token = getToken()
  const uploadUrl = `${API_BASE}/attachments/upload?biz_type=${encodeURIComponent(bizType)}&biz_id=${encodeURIComponent(bizId)}`
  const uploaded = []
  uni.showLoading({ title: '上传中...' })
  try {
    for (const filePath of choose.tempFilePaths) {
      const uploadRes = await new Promise((ok, fail) => {
        uni.uploadFile({
          url: uploadUrl,
          filePath,
          name: 'file',
          header: {
            Authorization: token ? `Bearer ${token}` : ''
          },
          success: ok,
          fail
        })
      })
      if (uploadRes.statusCode === 401) {
        uni.showToast({ title: '登录已失效', icon: 'none' })
        break
      }
      const body = parseBody(uploadRes.data)
      // bx: code===0
      if (body.code !== 0 || !body.data?.id) {
        uni.showToast({ title: body.msg || body.message || '上传失败', icon: 'none' })
        break
      }
      uploaded.push({
        id: String(body.data.id),
        fileName: body.data.fileName || body.data.file_name || '',
        localPath: filePath
      })
    }
  } catch (e) {
    uni.showToast({
      title: e instanceof Error ? e.message : '上传失败',
      icon: 'none'
    })
  } finally {
    uni.hideLoading()
  }
  return uploaded
}