import { defineStore } from 'pinia'
import { ref } from 'vue'
import {
  fetchSettings,
  saveSettings,
  clearSetting,
  fetchModelPresets,
  createModelPreset,
  updateModelPreset,
  deleteModelPreset,
  type SettingEntry,
  type ModelPreset,
} from '../api/client'

const STORAGE_KEY = 'playchat_settings_password'

export const useSettingsStore = defineStore('settings', () => {
  const password = ref(sessionStorage.getItem(STORAGE_KEY) ?? '')
  const unlocked = ref(false)
  const entries = ref<SettingEntry[]>([])
  const modelPresets = ref<ModelPreset[]>([])
  const loading = ref(false)
  const error = ref<string | null>(null)

  async function unlock(candidatePassword: string): Promise<boolean> {
    loading.value = true
    error.value = null
    try {
      entries.value = await fetchSettings(candidatePassword)
      password.value = candidatePassword
      sessionStorage.setItem(STORAGE_KEY, candidatePassword)
      unlocked.value = true
      return true
    } catch (e) {
      unlocked.value = false
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
      return false
    } finally {
      loading.value = false
    }
  }

  /** ページ再読み込み時などに、保存済みパスワードで自動的に再認証を試みる。 */
  async function tryAutoUnlock(): Promise<void> {
    if (!password.value || unlocked.value) return
    await unlock(password.value)
  }

  async function save(values: Record<string, string>): Promise<boolean> {
    loading.value = true
    error.value = null
    try {
      entries.value = await saveSettings(values, password.value)
      return true
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
      return false
    } finally {
      loading.value = false
    }
  }

  async function clear(key: string): Promise<void> {
    error.value = null
    try {
      entries.value = await clearSetting(key, password.value)
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
    }
  }

  function lock() {
    unlocked.value = false
    password.value = ''
    sessionStorage.removeItem(STORAGE_KEY)
  }

  /** モデル一覧は認証不要で誰でも取得できる（ModelSelectorから直接呼ばれる想定）。 */
  async function loadModelPresets(): Promise<void> {
    try {
      modelPresets.value = await fetchModelPresets()
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
    }
  }

  async function addModelPreset(label: string, value: string): Promise<boolean> {
    error.value = null
    try {
      const created = await createModelPreset(label, value, password.value)
      modelPresets.value = [...modelPresets.value, created]
      return true
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
      return false
    }
  }

  async function editModelPreset(id: number, label: string, value: string): Promise<boolean> {
    error.value = null
    try {
      const updated = await updateModelPreset(id, label, value, password.value)
      modelPresets.value = modelPresets.value.map((p) => (p.id === id ? updated : p))
      return true
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
      return false
    }
  }

  async function removeModelPreset(id: number): Promise<void> {
    error.value = null
    try {
      await deleteModelPreset(id, password.value)
      modelPresets.value = modelPresets.value.filter((p) => p.id !== id)
    } catch (e) {
      error.value = e instanceof Error ? e.message : 'エラーが発生しました'
    }
  }

  return {
    password,
    unlocked,
    entries,
    modelPresets,
    loading,
    error,
    unlock,
    tryAutoUnlock,
    save,
    clear,
    lock,
    loadModelPresets,
    addModelPreset,
    editModelPreset,
    removeModelPreset,
  }
})