// Author: fruit.com.cn

import { computed, nextTick, onMounted, reactive, ref } from 'vue'
import type { FormInstance } from 'element-plus'
import type { MediaTranscodeProfile } from '@/api/admin/types'
import { useI18n } from '@/hooks/web/useI18n'
import { useRbac } from '@/stores/rbac'
import { defaultProfile, defaultRung } from './transcodeProfileDefaults'
import {
  createEnabledRules,
  createProfileRules,
  createQualityRules,
  positiveEvenRule,
  positiveIntegerRule
} from './transcodeProfileRules'
import {
  loadTranscodeProfile,
  runTranscodeBackfill,
  saveTranscodeProfile
} from './transcodeSettingsActions'

/** 转码设置页的响应式状态与动作装配。 */
export function useTranscodeSettings() {
  const { t } = useI18n()
  const { can } = useRbac()
  const formRef = ref<FormInstance>()
  const loading = ref(false)
  const saving = ref(false)
  const backfilling = ref(false)
  const loadError = ref('')
  const form = reactive<MediaTranscodeProfile>(defaultProfile())
  const canManage = computed(() => can('episode:upload'))
  const context = { form, formRef, loading, saving, backfilling, loadError, canManage, t }
  const rules = computed(() => createProfileRules(t))
  const enabledRules = computed(() => createEnabledRules(form, t))
  const qualityRules = (index: number) => createQualityRules(form, index, t)

  const addRung = (): void => {
    form.ladder.push(defaultRung())
    nextTick(() => formRef.value?.clearValidate())
  }

  const deleteRung = (index: number): void => {
    form.ladder.splice(index, 1)
    nextTick(() => formRef.value?.clearValidate())
  }

  const loadProfile = () => loadTranscodeProfile(context)
  const saveProfile = () => saveTranscodeProfile(context)
  onMounted(loadProfile)

  return {
    form,
    formRef,
    rules,
    loading,
    saving,
    backfilling,
    loadError,
    canManage,
    qualityRules,
    positiveEvenRule: () => positiveEvenRule(t),
    positiveIntegerRule: () => positiveIntegerRule(t),
    enabledRules,
    loadProfile,
    addRung,
    deleteRung,
    saveProfile,
    runBackfill: () => runTranscodeBackfill(context)
  }
}