// Author: fruit.com.cn

import type { FormItemRule, FormRules } from 'element-plus'
import type { MediaTranscodeProfile } from '@/api/admin/types'
import {
  MAX_QUALITY_LENGTH,
  MAX_SEGMENT_SECONDS,
  MAX_SPRITE_COLUMNS,
  MAX_SPRITE_INTERVAL,
  MAX_THUMB_WIDTH,
  MIN_SPRITE_COLUMNS,
  MIN_SEGMENT_SECONDS,
  MIN_SPRITE_INTERVAL,
  MIN_THUMB_WIDTH
} from './transcodeProfileDefaults'

type Translate = (key: string, named?: Record<string, unknown>) => string

const rangeRule = (min: number, max: number, t: Translate): FormItemRule => ({
  trigger: 'change',
  validator: (_rule, value, callback) => {
    const parsed = Number(value)
    callback(
      Number.isInteger(parsed) && parsed >= min && parsed <= max
        ? undefined
        : new Error(t('transcodeSettings.validation.range', { min, max }))
    )
  }
})

export const positiveIntegerRule = (t: Translate): FormItemRule => ({
  trigger: 'change',
  validator: (_rule, value, callback) => {
    const parsed = Number(value)
    callback(
      Number.isInteger(parsed) && parsed > 0
        ? undefined
        : new Error(t('transcodeSettings.validation.positiveInteger'))
    )
  }
})

export const positiveEvenRule = (t: Translate): FormItemRule => ({
  trigger: 'change',
  validator: (_rule, value, callback) => {
    const parsed = Number(value)
    callback(
      Number.isInteger(parsed) && parsed > 0 && parsed % 2 === 0
        ? undefined
        : new Error(t('transcodeSettings.validation.positiveEven'))
    )
  }
})

export const createProfileRules = (t: Translate): FormRules => ({
  segmentSeconds: [rangeRule(MIN_SEGMENT_SECONDS, MAX_SEGMENT_SECONDS, t)],
  'sprite.intervalSeconds': [rangeRule(MIN_SPRITE_INTERVAL, MAX_SPRITE_INTERVAL, t)],
  'sprite.columns': [rangeRule(MIN_SPRITE_COLUMNS, MAX_SPRITE_COLUMNS, t)],
  'sprite.thumbWidth': [rangeRule(MIN_THUMB_WIDTH, MAX_THUMB_WIDTH, t)]
})

export const createQualityRules = (
  form: MediaTranscodeProfile,
  index: number,
  t: Translate
): FormItemRule[] => [
  {
    trigger: 'blur',
    validator: (_rule, value, callback) => {
      const quality = String(value ?? '').trim()
      if (!quality) {
        callback(new Error(t('transcodeSettings.validation.required')))
        return
      }
      if (quality.length > MAX_QUALITY_LENGTH) {
        callback(new Error(t('transcodeSettings.validation.qualityTooLong')))
        return
      }
      const duplicate = form.ladder.some(
        (row, rowIndex) => rowIndex !== index && row.quality.trim() === quality
      )
      callback(duplicate ? new Error(t('transcodeSettings.validation.qualityUnique')) : undefined)
    }
  }
]

export const createEnabledRules = (form: MediaTranscodeProfile, t: Translate): FormItemRule[] => [
  {
    trigger: 'change',
    validator: (_rule, _value, callback) => {
      callback(
        form.ladder.some((row) => row.enabled)
          ? undefined
          : new Error(t('transcodeSettings.validation.atLeastOneEnabled'))
      )
    }
  }
]