/**
 * 站点配置 store：公共配置 + Logo/favicon（需求④）+ 背景/页脚/通知（⑤⑥⑦）+ 策略范围（⑧）。
 * 远程 URL 默认值已删除：Logo/favicon 使用本地打包资源兜底（config 自定义仍优先）。
 */
import { defineStore } from 'pinia'
import { request } from '@/api/http'
import { paths } from '@/api/paths'
import { pick } from '@/utils/format'
import logoLocal from '@/assets/brand/logo.svg'
import faviconLocal from '@/assets/brand/favicon.png'

/** 需求④：默认 Logo（导航栏）与 favicon（浏览器标签）——本地打包资源，无远程依赖 */
export const DEFAULT_LOGO_URL = logoLocal
export const DEFAULT_FAVICON_URL = faviconLocal
export const DEFAULT_SITE_NAME = '文件快传'

export interface ConfigState {
  loaded: boolean
  loading: boolean
  siteName: string
  siteDomain: string
  description: string
  explain: string
  uploadSize: number
  allowedFileTypes: string[]
  expireStyle: string[]
  enableChunk: boolean
  openUpload: boolean
  notifyEnabled: boolean
  notifyTitle: string
  notifyContent: string
  logoUrl: string
  faviconUrl: string
  backgroundUrl: string
  footerText: string
  footerBeian: string
  maxFileSize: number
  maxSaveSeconds: number
  maxSaveCount: number
  uploadCount: number
  uploadMinute: number
}

function toBool(v: unknown, fallback = true): boolean {
  if (v === undefined || v === null) return fallback
  if (typeof v === 'boolean') return v
  if (typeof v === 'number') return v !== 0
  return String(v) !== '0' && String(v) !== 'false' && String(v) !== ''
}

function toList(v: unknown): string[] {
  if (Array.isArray(v)) return v.map((x) => String(x).trim()).filter(Boolean)
  if (typeof v === 'string') {
    return v
      .split(',')
      .map((x) => x.trim())
      .filter(Boolean)
  }
  return []
}

function toNum(v: unknown, fallback: number): number {
  const n = Number(v)
  return Number.isFinite(n) ? n : fallback
}

export const useConfigStore = defineStore('config', {
  state: (): ConfigState => ({
    loaded: false,
    loading: false,
    siteName: DEFAULT_SITE_NAME,
    siteDomain: '',
    description: '',
    explain: '',
    uploadSize: 10 * 1024 * 1024,
    allowedFileTypes: [],
    expireStyle: ['day', 'hour', 'minute', 'forever', 'count'],
    enableChunk: false,
    openUpload: true,
    notifyEnabled: false,
    notifyTitle: '',
    notifyContent: '',
    logoUrl: '',
    faviconUrl: '',
    backgroundUrl: '',
    footerText: '',
    footerBeian: '',
    maxFileSize: 0,
    maxSaveSeconds: 0,
    maxSaveCount: 0,
    uploadCount: 0,
    uploadMinute: 0,
  }),
  getters: {
    /** 需求④：自定义优先，本地打包资源兜底 */
    displayLogoUrl: (s) => (s.logoUrl?.trim() ? s.logoUrl : DEFAULT_LOGO_URL),
    displayFaviconUrl: (s) => (s.faviconUrl?.trim() ? s.faviconUrl : DEFAULT_FAVICON_URL),
    displayName: (s) => (s.siteName?.trim() ? s.siteName : DEFAULT_SITE_NAME),
    /** v3.1：分享链接基础地址——配置了对外域名用之，否则当前访问地址 */
    shareLinkBase: (s): string => (s.siteDomain?.trim() ? s.siteDomain.trim().replace(/\/$/, '') : location.origin),
    /** ⑧ 存储策略：max_file_size>0 时优先，否则回落 uploadSize */
    effectiveMaxFileSize(): number {
      return this.maxFileSize > 0 ? this.maxFileSize : this.uploadSize
    },
  },
  actions: {
    /** 拉取公共配置；失败静默使用默认值（未部署后端时前端仍可浏览） */
    async load(): Promise<void> {
      this.loading = true
      try {
        const raw = await request<Record<string, unknown>>(paths.publicConfig, { timeout: 8000 })
        const cfg = (pick<Record<string, unknown>>(raw, ['config']) ?? raw) as Record<string, unknown>
        this.siteName = String(pick<string>(cfg, ['name', 'site_name', 'siteName']) ?? DEFAULT_SITE_NAME)
        // v3.1：站点对外域名（空=当前访问地址）
        this.siteDomain = String(pick<string>(cfg, ['site_domain', 'siteDomain']) ?? '').trim()
        this.description = String(pick<string>(cfg, ['description']) ?? '')
        this.explain = String(pick<string>(cfg, ['explain', 'page_explain']) ?? '')
        this.uploadSize = toNum(pick<unknown>(cfg, ['uploadSize', 'upload_size']), 10 * 1024 * 1024)
        this.allowedFileTypes = toList(pick<unknown>(cfg, ['allowedFileTypes', 'allowed_file_types']))
        const styles = toList(pick<unknown>(cfg, ['expireStyle', 'expire_style']))
        if (styles.length) this.expireStyle = styles
        this.enableChunk = toBool(pick<unknown>(cfg, ['enableChunk', 'enable_chunk']), false)
        this.openUpload = toBool(pick<unknown>(cfg, ['openUpload', 'open_upload']), true)
        this.notifyTitle = String(pick<string>(cfg, ['notify_title', 'notifyTitle']) ?? '')
        this.notifyContent = String(pick<string>(cfg, ['notify_content', 'notifyContent']) ?? '')
        // 需求⑦：通知开关（1/0）
        this.notifyEnabled = toBool(pick<unknown>(cfg, ['notify_enabled', 'notifyEnabled']), false)
        // 需求⑤：背景图
        this.backgroundUrl = String(pick<string>(cfg, ['background_url', 'backgroundUrl']) ?? '').trim()
        // 需求⑥：页脚
        this.footerText = String(pick<string>(cfg, ['footer_text', 'footerText']) ?? '')
        this.footerBeian = String(pick<string>(cfg, ['footer_beian', 'footerBeian']) ?? '')
        // 需求⑧：保存策略与上传频率
        this.maxFileSize = toNum(pick<unknown>(cfg, ['max_file_size', 'maxFileSize', 'maxFileSize']), 0)
        this.maxSaveSeconds = toNum(pick<unknown>(cfg, ['max_save_seconds', 'maxSaveSeconds']), 0)
        this.maxSaveCount = toNum(pick<unknown>(cfg, ['max_save_count', 'maxSaveCount']), 0)
        this.uploadCount = toNum(pick<unknown>(cfg, ['uploadCount', 'upload_count']), 0)
        this.uploadMinute = toNum(pick<unknown>(cfg, ['uploadMinute', 'upload_minute']), 0)
        // 需求④：运行时优先读 config 的 logo_url/favicon_url，空值回退本地默认
        this.logoUrl = String(pick<string>(cfg, ['logo_url', 'logoUrl']) ?? '').trim()
        this.faviconUrl = String(pick<string>(cfg, ['favicon_url', 'faviconUrl']) ?? '').trim()
        this.loaded = true
        this.applyToDocument()
      } catch {
        // 保持默认值
      } finally {
        this.loading = false
      }
    },
    /** 将站点名与 favicon 应用到 document（管理端保存配置后调用即可全站生效） */
    applyToDocument(): void {
      let link = document.querySelector<HTMLLinkElement>('link[rel="icon"]')
      if (!link) {
        link = document.createElement('link')
        link.rel = 'icon'
        document.head.appendChild(link)
      }
      link.href = this.displayFaviconUrl
    },
  },
})