import { defineStore } from 'pinia'
import { ref, computed } from 'vue'
import config from '../config'

export const useUploadStore = defineStore('upload', () => {
  // 状态
  const selectedFiles = ref([])
  const textContent = ref('')
  const textType = ref('plain')
  const expirationHours = ref(3)
  const maxDownloadCount = ref(-1)
  const password = ref('')
  const uploadResult = ref(null)
  const uploading = ref(false)

  // 上传进度状态
  const uploadProgress = ref(0) // 0-100
  const uploadSpeed = ref(0) // 字节/秒
  const uploadedBytes = ref(0) // 已上传字节数
  const totalBytes = ref(0) // 总字节数

  // 计算属性
  const hasFiles = computed(() => selectedFiles.value.length > 0)
  const hasText = computed(() => textContent.value.trim().length > 0)
  const canUpload = computed(() => hasFiles.value || hasText.value)
  const totalFileSize = computed(() => {
    return selectedFiles.value.reduce((sum, file) => sum + file.size, 0)
  })

  // 计算剩余时间（秒）
  const remainingTime = computed(() => {
    if (uploadSpeed.value === 0 || uploadProgress.value >= 100) {
      return 0
    }
    const remainingBytes = totalBytes.value - uploadedBytes.value
    return Math.ceil(remainingBytes / uploadSpeed.value)
  })

  // 方法
  function addFiles(files) {
    const remainingSlots = config.maxFiles - selectedFiles.value.length
    const filesToAdd = []
    const rejectedFiles = []

    // 文件大小预检
    for (const file of files.slice(0, remainingSlots)) {
      // 检查文件大小
      if (file.size > config.uploadLimit) {
        rejectedFiles.push({
          file,
          reason: 'size',
          maxSize: config.uploadLimit
        })
        continue
      }

      // 检查是否重复
      if (!selectedFiles.value.some(f => f.name === file.name && f.size === file.size)) {
        filesToAdd.push(file)
      }
    }

    // 添加有效的文件
    filesToAdd.forEach(file => {
      selectedFiles.value.push({
        id: Date.now() + Math.random(),
        file,
        name: file.name,
        size: file.size,
        type: file.type,
        progress: 0
      })
    })

    return {
      added: filesToAdd.length,
      rejected: rejectedFiles
    }
  }

  function removeFile(id) {
    const index = selectedFiles.value.findIndex(f => f.id === id)
    if (index > -1) {
      selectedFiles.value.splice(index, 1)
    }
  }

  function clearFiles() {
    selectedFiles.value = []
  }

  function reset() {
    selectedFiles.value = []
    textContent.value = ''
    textType.value = 'plain'
    expirationHours.value = 3
    maxDownloadCount.value = -1
    password.value = ''
    uploadResult.value = null
    uploading.value = false
    resetUploadProgress() // 重置进度
  }

  function setUploadResult(result) {
    uploadResult.value = result
  }

  function setUploading(status) {
    uploading.value = status
  }

  function updateFileProgress(id, progress) {
    const file = selectedFiles.value.find(f => f.id === id)
    if (file) {
      file.progress = progress
    }
  }

  // 更新上传进度
  function setUploadProgress(percent, speed, loaded, total) {
    uploadProgress.value = percent
    uploadSpeed.value = speed
    uploadedBytes.value = loaded
    totalBytes.value = total
  }

  // 重置上传进度
  function resetUploadProgress() {
    uploadProgress.value = 0
    uploadSpeed.value = 0
    uploadedBytes.value = 0
    totalBytes.value = 0
  }

  return {
    // 状态
    selectedFiles,
    textContent,
    textType,
    expirationHours,
    maxDownloadCount,
    password,
    uploadResult,
    uploading,

    // 计算属性
    hasFiles,
    hasText,
    canUpload,
    totalFileSize,

    // 方法
    addFiles,
    removeFile,
    clearFiles,
    reset,
    setUploadResult,
    setUploading,
    updateFileProgress,
    setUploadProgress,
    resetUploadProgress
  }
})