import { computed, onMounted, ref } from 'vue'
import type { GrowthReport } from '@yuxingu/types'
import { validateBirth } from '@yuxingu/utils'
import { api } from '../api/client'
import { AnalyticsEvent, track } from '../lib/analytics'

export const promptRows = [
  { icon: '🌊', label: '最近情绪有点乱，帮我理一理', scene: '情绪整理' },
  { icon: '💬', label: '和 TA 相处时，我总在重复什么模式？', scene: '关系反思' },
  { icon: '🪞', label: '我想更了解自己此刻的状态', scene: '自我觉察' },
  { icon: '🍃', label: '生活节奏太快，我需要一点方向感', scene: '生活节奏' },
]

export function useImageCardPage() {
  const scenes = ref<{ key: string; label: string }[]>([])
  const scene = ref('情绪整理')
  const quota = ref<{ remaining: number; daily_free: number; unlimited: boolean } | null>(null)
  const year = ref('')
  const month = ref('')
  const day = ref('')
  const wantDepth = ref(false)
  const drawing = ref(false)
  const paying = ref(false)
  const error = ref('')
  const bootError = ref('')
  const cards = ref<{ id: string; title: string; imagery: string; prompt: string; tip: string }[]>([])
  const report = ref<GrowthReport | null>(null)
  const questionInput = ref('')
  const showBirth = ref(false)

  const summary = computed(() => (report.value?.summary || {}) as Record<string, unknown>)
  const detail = computed(() => (report.value?.detail || null) as Record<string, unknown> | null)
  const quotaLabel = computed(() => {
    if (!quota.value) return '…'
    if (quota.value.unlimited) return '不限（会员）'
    return `${quota.value.remaining} / ${quota.value.daily_free}`
  })

  function birthFilled() {
    const y = Number(year.value)
    const m = Number(month.value)
    const d = Number(day.value)
    return !validateBirth(y, m, d)
  }

  function selectScene(key: string) {
    scene.value = key
    track('cards_scene_selected', { scene: key })
  }

  function onPromptClick(row: { label: string; scene: string }) {
    selectScene(row.scene)
    questionInput.value = row.label
    if (birthFilled()) {
      draw()
    } else {
      showBirth.value = true
    }
  }

  function sendDraw() {
    if (questionInput.value.trim()) {
      scene.value = questionInput.value.trim()
    }
    draw()
  }

  async function refreshQuota() {
    quota.value = await api.getImageCardQuota()
  }

  async function boot() {
    try {
      const [sc] = await Promise.all([api.listImageCardScenes(), refreshQuota()])
      scenes.value = sc.items || []
      if (scenes.value.length && !scenes.value.find((s) => s.key === scene.value)) {
        scene.value = scenes.value[0].key
      }
    } catch (e) {
      bootError.value = e instanceof Error ? e.message : '加载失败'
    }
  }

  async function draw() {
    error.value = ''
    const y = Number(year.value)
    const m = Number(month.value)
    const d = Number(day.value)
    const msg = validateBirth(y, m, d)
    if (msg) {
      error.value = msg
      showBirth.value = true
      return
    }
    drawing.value = true
    try {
      const birth = `${y}-${String(m).padStart(2, '0')}-${String(d).padStart(2, '0')}`
      const profile = await api.createProfile({ relation: 'self', birth_date: birth, display_name: '我' })
      const out = await api.drawImageCard({
        profile_id: profile.id,
        scene: scene.value,
        depth: wantDepth.value,
      })
      cards.value = out.cards || []
      report.value = out.report
      quota.value = {
        remaining: out.quota_left,
        daily_free: quota.value?.daily_free || 3,
        unlimited: !!quota.value?.unlimited,
      }
      track('cards_drawn', { scene: scene.value, depth: wantDepth.value ? 1 : 0 })
    } catch (e) {
      const m = e instanceof Error ? e.message : '抽取失败'
      error.value = m
      if (m.includes('次数')) track('cards_quota_exhausted')
    } finally {
      drawing.value = false
    }
  }

  async function buyDeep() {
    if (!report.value) return
    paying.value = true
    error.value = ''
    track(AnalyticsEvent.DeepAccessClicked, { surface: 'cards' })
    try {
      const { order_id } = await api.createOrder({ kind: 'deep_access', report_id: report.value.id })
      await api.payMock(order_id)
      report.value = await api.getReport(report.value.id)
      track(AnalyticsEvent.PurchaseCompleted, { kind: 'deep_access' })
    } catch (e) {
      error.value = e instanceof Error ? e.message : '支付失败'
    } finally {
      paying.value = false
    }
  }

  onMounted(boot)

  return {
    scene,
    quotaLabel,
    year,
    month,
    day,
    wantDepth,
    drawing,
    paying,
    error,
    bootError,
    cards,
    report,
    questionInput,
    showBirth,
    summary,
    detail,
    onPromptClick,
    sendDraw,
    draw,
    buyDeep,
  }
}