<script setup lang="ts">
import { ref, computed } from 'vue';
import { useI18n } from 'vue-i18n';
import { useBetSlipStore } from '../stores/betSlip';
import api from '../api';

const props = defineProps<{ modelValue: boolean }>();
const emit = defineEmits<{ 'update:modelValue': [boolean] }>();

const { t } = useI18n();
const slip = useBetSlipStore();
const show = computed({
  get: () => props.modelValue,
  set: (v) => emit('update:modelValue', v),
});

const loading = ref(false);
const error = ref('');
const success = ref('');

function genId() {
  return `${Date.now()}-${Math.random().toString(36).slice(2)}`;
}

async function placeBet() {
  if (!slip.items.length) return;
  loading.value = true;
  error.value = '';
  success.value = '';

  try {
    const requestId = genId();
    if (slip.mode === 'parlay' && slip.items.length >= 2) {
      if (slip.hasSameMatch) {
        error.value = t('bet.parlay_same_match');
        return;
      }
      await api.post('/player/bets/parlay', {
        legs: slip.items.map((i) => ({
          selectionId: i.selectionId,
          oddsVersion: i.oddsVersion,
        })),
        stake: slip.stake,
        requestId,
      });
    } else if (slip.items.length === 1) {
      const item = slip.items[0];
      await api.post('/player/bets/single', {
        selectionId: item.selectionId,
        oddsVersion: item.oddsVersion,
        stake: slip.stake,
        requestId,
      });
    } else {
      error.value = t('bet.parlay_need_more');
      return;
    }
    success.value = '下注成功！';
    slip.clear();
    setTimeout(() => { show.value = false; success.value = ''; }, 1500);
  } catch (e: unknown) {
    error.value = (e as { response?: { data?: { error?: string } } })?.response?.data?.error || '下注失败';
  } finally {
    loading.value = false;
  }
}
</script>

<template>
  <div v-if="show" class="overlay" @click.self="show = false">
    <div class="drawer">
      <div class="drawer-header">
        <h3>{{ t('bet.bet_slip') }} <span class="count">({{ slip.count }})</span></h3>
        <button class="close-btn" @click="show = false">✕</button>
      </div>

      <div v-if="!slip.items.length" class="empty">点击赔率添加投注</div>

      <div v-for="item in slip.items" :key="item.selectionId" class="slip-item">
        <div class="item-name">{{ item.matchName }}</div>
        <div class="item-sel">{{ item.selectionName }} @ <span class="odds">{{ item.odds }}</span></div>
        <button class="remove" @click="slip.removeItem(item.selectionId)">移除</button>
      </div>

      <div v-if="slip.hasSameMatch" class="warn">同场比赛不能串关，可作为单关分别投注</div>

      <div v-if="slip.items.length" class="stake-area">
        <label>{{ t('bet.stake') }}</label>
        <input v-model.number="slip.stake" type="number" min="1" />
        <div v-if="slip.isParlay" class="mode-tag">{{ t('bet.parlay') }} · 赔率 {{ slip.totalOdds.toFixed(2) }}</div>
        <div class="return">预计返还: <strong>{{ slip.potentialReturn.toFixed(2) }}</strong></div>
      </div>

      <p v-if="error" class="error">{{ error }}</p>
      <p v-if="success" class="success">{{ success }}</p>

      <button class="btn-primary" :disabled="loading || !slip.items.length" @click="placeBet">
        {{ t('bet.place_bet') }}
      </button>
    </div>
  </div>
</template>

<style scoped>
.overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 200;
  display: flex; align-items: flex-end;
}
.drawer {
  background: linear-gradient(180deg, #222 0%, #141414 100%);
  width: 100%;
  max-height: 80vh;
  border-radius: 20px 20px 0 0;
  padding: 20px 16px calc(20px + env(safe-area-inset-bottom, 0));
  overflow-y: auto;
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.35);
}
.drawer-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.drawer-header h3 { font-size: 18px; font-weight: 800; letter-spacing: 0.04em; }
.count { color: var(--primary-light); font-size: 20px; font-weight: 800; }
.close-btn { background: none; color: var(--text-muted); font-size: 22px; padding: 4px; font-weight: 700; }
.slip-item {
  padding: 14px;
  background: #111;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}
.item-name { font-size: 14px; font-weight: 800; }
.item-sel { font-size: 13px; color: var(--text-muted); margin-top: 6px; font-weight: 500; }
.odds { color: var(--primary-light); font-weight: 800; }
.remove { background: none; color: var(--danger); font-size: 13px; margin-top: 8px; font-weight: 700; }
.stake-area { margin: 18px 0; }
.stake-area label { font-size: 13px; color: var(--primary-light); display: block; margin-bottom: 8px; font-weight: 700; letter-spacing: 0.04em; }
.return { font-size: 15px; color: var(--text-muted); margin-top: 12px; font-weight: 600; }
.return strong {
  color: var(--primary-light);
  font-size: 22px;
  font-weight: 800;
  text-shadow: none;
}
.mode-tag { font-size: 13px; color: var(--primary-light); font-weight: 700; margin-top: 8px; }
.warn { color: var(--primary-light); font-size: 13px; margin-bottom: 10px; font-weight: 600; }
.error { color: var(--danger); font-size: 14px; margin-bottom: 8px; font-weight: 600; }
.success { color: var(--primary-light); font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.empty { text-align: center; color: var(--text-muted); padding: 32px; font-weight: 600; }
</style>
