import { defineStore } from 'pinia'
import { computed, ref } from 'vue'
import { notify } from '@/utils/notify'

export const useAppStore = defineStore('app', () => {
  const apiBase = ref(localStorage.getItem('financeAiApiBase') || 'http://127.0.0.1:8775')
  const token = ref(localStorage.getItem('financeAiToken') || '')
  const currentUser = ref(null)
  const healthy = ref(false)

  const permissions = computed(() => new Set(currentUser.value?.permissions || []))
  function hasPermission(code) {
    if (!currentUser.value) return false
    if (!code) return true
    if (currentUser.value.is_superuser) return true
    return permissions.value.has(code)
  }

  function setApiBase(value) {
    apiBase.value = (value || '').trim() || 'http://127.0.0.1:8775'
    localStorage.setItem('financeAiApiBase', apiBase.value)
  }

  function setToken(value) {
    token.value = value || ''
    if (value) localStorage.setItem('financeAiToken', value)
    else localStorage.removeItem('financeAiToken')
  }

  function setCurrentUser(user) {
    currentUser.value = user || null
  }

  async function checkHealth() {
    try {
      const url = `${apiBase.value.replace(/\/$/, '')}/health`
      const res = await fetch(url)
      healthy.value = res.ok
    } catch {
      healthy.value = false
    }
  }

  async function loadCurrentUser() {
    if (!token.value) {
      currentUser.value = null
      return
    }
    try {
      const { request } = await import('@/api/client')
      currentUser.value = await request('/api/auth/me')
    } catch {
      currentUser.value = null
      setToken('')
    }
  }

  async function logout() {
    if (token.value) {
      try {
        const { request } = await import('@/api/client')
        await request('/api/auth/logout', { method: 'POST' })
      } catch (err) {
        console.warn(err)
      }
    }
    setToken('')
    currentUser.value = null
  }

  function toast(message, type = 'info') {
    notify[type] ? notify[type](message) : notify.info(message)
  }

  return {
    apiBase, token, currentUser, healthy, permissions,
    setApiBase, setToken, setCurrentUser, checkHealth, loadCurrentUser, logout, toast, hasPermission,
  }
})