<script lang='ts' setup>
import type { Treaty } from "@elysiajs/eden";
import type { client } from "@/api";
import { alertController, toastController } from "@ionic/vue";
import { checkmarkCircleOutline, documentTextOutline, keyOutline, swapHorizontalOutline, walletOutline } from "ionicons/icons";
import { safeClient } from "@/api";

type Wallet = Treaty.Data<typeof client.api.wallet.wallets.get>[number];

const router = useRouter();
const walletStore = useWalletStore();
const { wallets } = storeToRefs(walletStore);
const filterWallets = computed(() => wallets.value.filter(w => w.walletType.allowExchange === true));

// 兑换金额
const exchangeAmount = ref("");
const quickAmounts = [100, 500, 1000, 2000];

// 转出钱包
const fromWallet = ref<Wallet | null>(null);

// 转入钱包
const toWallet = ref<Wallet | null>(null);

// 交易密码
const transactionPassword = ref("");

onMounted(async () => {
  await walletStore.syncWallets();
  if (filterWallets.value.length > 0) {
    fromWallet.value = filterWallets.value[0];
    if (filterWallets.value.length > 1) {
      toWallet.value = filterWallets.value[1];
    }
  }
});

// 可兑换余额
const availableBalance = computed(() => {
  return Number(fromWallet.value?.available) || 0;
});

// 可选择的转入钱包（排除转出钱包）
const toWalletOptions = computed(() => {
  if (!fromWallet.value) {
    return filterWallets.value;
  }
  return filterWallets.value.filter(w => w.id !== fromWallet.value?.id);
});

function selectQuickAmount(amount: number) {
  if (amount <= availableBalance.value) {
    exchangeAmount.value = amount.toString();
  }
  else {
    showToast("兑换金额不能大于可用余额", "warning");
  }
}

function selectAllAmount() {
  exchangeAmount.value = availableBalance.value.toString();
}

function selectFromWallet(wallet: Wallet) {
  fromWallet.value = wallet;
  // 如果转入钱包和转出钱包相同，自动切换转入钱包
  if (toWallet.value?.id === wallet.id) {
    const otherWallets = filterWallets.value.filter(w => w.id !== wallet.id);
    toWallet.value = otherWallets.length > 0 ? otherWallets[0] : null;
  }
  // 重新验证兑换金额
  const amount = Number.parseFloat(exchangeAmount.value);
  if (amount > availableBalance.value) {
    exchangeAmount.value = "";
  }
}

function selectToWallet(wallet: Wallet) {
  toWallet.value = wallet;
}

function swapWallets() {
  if (fromWallet.value && toWallet.value) {
    const temp = fromWallet.value;
    fromWallet.value = toWallet.value;
    toWallet.value = temp;
    // 重新验证兑换金额
    const amount = Number.parseFloat(exchangeAmount.value);
    if (amount > availableBalance.value) {
      exchangeAmount.value = "";
    }
  }
}

async function showToast(message: string, color: "success" | "danger" | "warning" = "success") {
  const toast = await toastController.create({
    message,
    duration: 2000,
    position: "top",
    color,
  });
  await toast.present();
}

async function handleSubmit() {
  const amount = Number.parseFloat(exchangeAmount.value);

  // 验证兑换金额
  if (!exchangeAmount.value || Number.isNaN(amount) || amount <= 0) {
    await showToast("请输入有效的兑换金额", "warning");
    return;
  }

  if (amount < 1) {
    await showToast("兑换金额不能低于1元", "warning");
    return;
  }

  if (amount > availableBalance.value) {
    await showToast("兑换金额不能大于可用余额", "warning");
    return;
  }

  // 验证转出钱包选择
  if (!fromWallet.value) {
    await showToast("请选择转出钱包", "warning");
    return;
  }

  // 验证转入钱包选择
  if (!toWallet.value) {
    await showToast("请选择转入钱包", "warning");
    return;
  }

  if (fromWallet.value.id === toWallet.value.id) {
    await showToast("转出和转入钱包不能相同", "warning");
    return;
  }

  // 验证交易密码
  if (!transactionPassword.value) {
    await showToast("请输入交易密码", "warning");
    return;
  }

  if (transactionPassword.value.length < 6) {
    await showToast("交易密码至少6位", "warning");
    return;
  }

  const alert = await alertController.create({
    header: "确认兑换",
    message: `
      <div style="text-align: left; padding: 12px 0;">
        <p style="margin: 8px 0;"><strong>兑换金额：</strong>¥${amount.toFixed(2)}</p>
        <p style="margin: 8px 0;"><strong>转出钱包：</strong>${fromWallet.value.walletType.name}</p>
        <p style="margin: 8px 0;"><strong>转入钱包：</strong>${toWallet.value.walletType.name}</p>
      </div>
    `,
    buttons: [
      {
        text: "取消",
        role: "cancel",
      },
      {
        text: "确认兑换",
        handler: async () => {
          // TODO: 调用兑换 API
          // const { error } = await safeClient(client.api.exchange.post({
          //   fromWalletId: fromWallet.value.id,
          //   toWalletId: toWallet.value.id,
          //   amount,
          //   transactionPassword: transactionPassword.value,
          // }));

          await showToast("兑换成功");
          exchangeAmount.value = "";
          transactionPassword.value = "";
          await walletStore.syncWallets();
        },
      },
    ],
  });

  await alert.present();
}

function goToRecords() {
  // router.push("/exchange/records");
  showToast("功能开发中", "warning");
}
</script>

<template>
  <ion-page>
    <ion-header class="ion-no-border">
      <ion-toolbar class="ion-toolbar">
        <ion-buttons slot="start">
          <back-button />
        </ion-buttons>
        <ion-title>兑换</ion-title>
        <ion-buttons slot="end">
          <ion-button color="light" size="small" @click="goToRecords">
            <ion-icon slot="icon-only" :icon="documentTextOutline" />
          </ion-button>
        </ion-buttons>
      </ion-toolbar>
    </ion-header>

    <ion-content>
      <!-- 转出钱包 -->
      <div class="section-card">
        <div class="section-title">
          <ion-icon :icon="walletOutline" class="title-icon" />
          转出钱包
        </div>
        <div v-if="filterWallets.length > 0" class="wallet-list">
          <div
            v-for="wallet in filterWallets"
            :key="wallet.id"
            class="wallet-item"
            :class="{ active: fromWallet?.id === wallet.id }"
            @click="selectFromWallet(wallet)"
          >
            <div class="wallet-info">
              <div class="wallet-name">
                {{ wallet.walletType.name }}
              </div>
              <div class="wallet-balance">
                可用余额：¥{{ Number(wallet.available).toFixed(2) }}
              </div>
            </div>
            <div v-if="fromWallet?.id === wallet.id" class="wallet-check">
              <ion-icon :icon="checkmarkCircleOutline" />
            </div>
          </div>
        </div>
        <div v-else class="no-wallets">
          <empty title="暂无可兑换钱包" />
        </div>
      </div>

      <!-- 兑换金额输入 -->
      <div class="section-card">
        <div class="section-title">
          兑换金额
        </div>
        <div class="amount-input-wrapper">
          <span class="currency-symbol">¥</span>
          <input
            v-model="exchangeAmount"
            type="number"
            inputmode="decimal"
            placeholder="请输入兑换金额"
            class="amount-input"
            :max="availableBalance"
          >
        </div>

        <!-- 快速选择金额 -->
        <div class="quick-amounts">
          <div
            v-for="amount in quickAmounts"
            :key="amount"
            class="quick-amount-btn"
            :class="{
              active: exchangeAmount === amount.toString(),
              disabled: amount > availableBalance,
            }"
            @click="selectQuickAmount(amount)"
          >
            ¥{{ amount }}
          </div>
          <div
            class="quick-amount-btn"
            :class="{ active: exchangeAmount === availableBalance.toString() }"
            @click="selectAllAmount"
          >
            全部
          </div>
        </div>

        <div class="amount-hint">
          <ion-icon :icon="checkmarkCircleOutline" class="hint-icon" />
          可兑换余额：¥{{ availableBalance.toFixed(2) }}（最低兑换金额 ¥1）
        </div>
      </div>

      <!-- 交易密码 -->
      <div class="section-card">
        <div class="section-title">
          <ion-icon :icon="keyOutline" class="title-icon" />
          交易密码
        </div>
        <div class="password-input-wrapper">
          <ion-input
            v-model="transactionPassword"
            type="password"
            placeholder="请输入交易密码"
            class="password-input"
            inputmode="numeric"
            :maxlength="20"
          />
        </div>
        <div class="password-hint">
          交易密码用于验证兑换操作，请妥善保管
        </div>
      </div>

      <!-- 提交按钮 -->
      <div class="submit-wrapper">
        <ion-button
          expand="block"
          class="submit-btn"
          @click="handleSubmit"
        >
          确认兑换
        </ion-button>
      </div>

      <!-- 温馨提示 -->
      <div class="notice-card">
        <div class="notice-title">
          温馨提示
        </div>
        <div class="notice-content">
          <p>1. 兑换将实时完成，请确认兑换信息无误</p>
          <p>2. 兑换金额最低1元，请确保账户余额充足</p>
          <p>3. 兑换完成后资金将在对应钱包中显示</p>
          <p>4. 兑换记录可在资产明细中查看</p>
          <p>5. 如遇问题，请及时联系客服处理</p>
        </div>
      </div>
    </ion-content>
  </ion-page>
</template>

<style lang='css' scoped>
.section-card {
  background: white;
  padding: 20px;
  margin-bottom: 12px;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  margin-bottom: 16px;
}

.title-icon {
  font-size: 20px;
  color: var(--ion-color-primary);
}

.wallet-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.wallet-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  background: #f5f5f5;
  border: 2px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.wallet-item.active {
  background: #fff5f5;
  border-color: var(--ion-color-primary);
}

.wallet-item:active {
  transform: scale(0.98);
}

.wallet-info {
  flex: 1;
}

.wallet-name {
  font-size: 15px;
  font-weight: 600;
  color: #333;
  margin-bottom: 4px;
}

.wallet-balance {
  font-size: 13px;
  color: #666;
}

.wallet-check {
  color: var(--ion-color-primary);
  font-size: 24px;
}

.amount-input-wrapper {
  display: flex;
  align-items: center;
  background: #f5f5f5;
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.currency-symbol {
  font-size: 24px;
  font-weight: 600;
  color: #333;
  margin-right: 8px;
}

.amount-input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 24px;
  font-weight: 600;
  color: #333;
  outline: none;
}

.amount-input::placeholder {
  color: #bbb;
  font-weight: 400;
}

.quick-amounts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.quick-amount-btn {
  padding: 12px;
  background: #f5f5f5;
  border: 2px solid transparent;
  border-radius: 8px;
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: #666;
  cursor: pointer;
  transition: all 0.3s ease;
}

.quick-amount-btn.active {
  background: white;
  border-color: var(--ion-color-primary);
  color: var(--ion-color-primary);
}

.quick-amount-btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.quick-amount-btn:not(.disabled):active {
  transform: scale(0.95);
}

.amount-hint {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: #999;
}

.hint-icon {
  font-size: 14px;
  color: var(--ion-color-success);
}

.swap-button-wrapper {
  display: flex;
  justify-content: center;
  padding: 0 20px;
  margin: -6px 0 12px 0;
}

.swap-button {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: white;
  border: 2px solid var(--ion-color-primary);
  border-radius: 20px;
  color: var(--ion-color-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(196, 30, 58, 0.15);
}

.swap-button:active {
  transform: scale(0.95);
  background: #fff5f5;
}

.swap-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.swap-icon {
  font-size: 20px;
}

.password-input-wrapper {
  background: #f5f5f5;
  border-radius: 12px;
  padding: 4px 12px;
  margin-bottom: 8px;
}

.password-input {
  --padding-start: 8px;
  --padding-end: 8px;
  font-size: 16px;
}

.password-hint {
  font-size: 12px;
  color: #999;
  line-height: 1.6;
}

.submit-wrapper {
  padding: 0 20px 20px;
}

.submit-btn {
  --background: linear-gradient(135deg, #c41e3a 0%, #8b1a2e 100%);
  --background-activated: linear-gradient(135deg, #8b1a2e 0%, #c41e3a 100%);
  --border-radius: 12px;
  --padding-top: 14px;
  --padding-bottom: 14px;
  font-weight: 600;
  font-size: 16px;
  text-transform: none;
  letter-spacing: 0.5px;
}

.notice-card {
  background: #f9fafb;
  padding: 16px 20px;
  margin: 0 0 20px 0;
}

.notice-title {
  font-size: 14px;
  font-weight: 600;
  color: #333;
  margin-bottom: 12px;
}

.notice-content {
  font-size: 12px;
  color: #666;
  line-height: 1.8;
}

.notice-content p {
  margin: 6px 0;
}
</style>
