import { useMainStore } from '@/stores/main'
import { FILE_TYPES, formatSize, formatUnixDate } from '@/utils'

export type FUID = string

export type DocProps = {
  loc: string
  name: string
  key: FUID
  size: number
  allocated: number
  mtime: number
  dir: boolean
  ghost?: boolean
  expires?: number // Unix timestamp for ghost expiry
  ar?: number // Aspect ratio (height/width) from server, if known
}

export class Doc {
  public loc: string = ''
  public key: FUID = ''
  public size: number = 0
  public allocated: number = 0
  public mtime: number = 0
  public dir: boolean = false
  public ghost: boolean = false
  public expires: number = 0 // Unix timestamp for ghost expiry (0 = no expiry)
  /** @internal Use the name getter/setter instead */
  public _name: string = ''
  public ar?: number // Aspect ratio (height/width), provided by server after first preview render

  constructor(props: Partial<DocProps> = {}) {
    const { name, ...rest } = props
    Object.assign(this, rest)
    if (name) this._name = name // Skip validation/haystack for bulk loading
  }
  get name() {
    return this._name
  }
  set name(name: string) {
    if (name.includes('/') || name.startsWith('.')) throw Error(`Invalid name: ${name}`)
    this._name = name
  }
  get sizedisp(): string {
    return formatSize(this.size)
  }
  /** Returns a sparse allocation indicator symbol, or empty string if fully allocated */
  get sparseIndicator(): string {
    if (this.dir || this.size <= this.allocated) return ''
    if (this.allocated === 0) return '⭕' // exactly zero
    const ratio = this.allocated / this.size
    // Round to nearest 25%: ◔◑◕⬤
    const rounded = Math.round(ratio * 4) // 0,1,2,3,4
    return ['◔', '◔', '◑', '◕', '⬤'][rounded]! // 0 maps to ◔ since we handled exact 0 above
  }
  get modified(): string {
    return formatUnixDate(this.mtime)
  }
  get url(): string {
    const p = this.loc ? `${this.loc}/${this.name}` : this.name
    return this.dir
      ? '/#/' + `${p}/`.replaceAll('#', '%23')
      : `/files/${p}`.replaceAll('?', '%3F').replaceAll('#', '%23')
  }
  get urlrouter(): string {
    return this.url.replace(/^\/#/, '')
  }
  get img(): boolean {
    return (
      !this.dir && (FILE_TYPES.imageBrowser as readonly string[]).includes(this.ext)
    )
  }
  get video(): boolean {
    return (FILE_TYPES.video as readonly string[]).includes(this.ext)
  }
  get audio(): boolean {
    return (FILE_TYPES.audio as readonly string[]).includes(this.ext)
  }
  get archive(): boolean {
    return (FILE_TYPES.archive as readonly string[]).includes(this.ext)
  }
  get document(): boolean {
    return (FILE_TYPES.document as readonly string[]).includes(this.ext)
  }
  // Images that require server-side preview (browsers cannot display them natively)
  get image(): boolean {
    return (FILE_TYPES.image as readonly string[]).includes(this.ext)
  }
  get print(): boolean {
    return (FILE_TYPES.print as readonly string[]).includes(this.ext)
  }
  get text(): boolean {
    return (FILE_TYPES.text as readonly string[]).includes(this.ext)
  }
  get editurl(): string {
    if (!this.text) return ''
    const p = this.loc ? `${this.loc}/${this.name}` : this.name
    return '/#/' + p.replaceAll('?', '%3F').replaceAll('#', '%23')
  }
  get complete(): boolean {
    return !this.ghost && (this.dir || this.size <= this.allocated)
  }
  get previewable(): boolean {
    if (this.dir) return false
    return (
      this.img ||
      this.video ||
      this.audio ||
      this.image ||
      this.print ||
      (this.document && useMainStore().server.office_previews !== false)
    )
  }
  get previewurl(): string {
    return !this.complete || !this.previewable
      ? ''
      : this.url.replace(/^\/files/, '/preview')
  }
  get ext(): string {
    const dotIndex = this.name.lastIndexOf('.')
    return dotIndex === -1 || dotIndex === this.name.length - 1
      ? ''
      : this.name.slice(dotIndex + 1).toLowerCase()
  }
}
export type errorEvent = {
  error: {
    code: number
    message: string
    redirect: string
  }
}

// Raw types the backend /api/watch sends us

export type FileEntry = [
  number, // level
  string, // name
  FUID,
  number, // mtime
  number, // size
  number, // allocated (actual disk usage)
  number, // isfile
  number? // ar: aspect ratio (height/width), present if known
]

export type UpdateEntry = ['k', number] | ['d', number] | ['i', Array<FileEntry>]

// Helper structure for selections
export interface SelectedItems {
  keys: FUID[]
  docs: Record<FUID, Doc>
  recursive: Array<[string, string, Doc]>
  missing: Set<FUID>
}