import { View, Text, Image, Swiper, SwiperItem } from '@tarojs/components'
import Taro from '@tarojs/taro'
import { useState } from 'react'
import './index.scss'
import { getProductById } from '../../utils/productConfig'
import { addDesign } from '../../utils/store'
import ThemeToggle from '../../components/ThemeToggle'
import { useThemeContext } from '../../context/ThemeContext'
import { getProductIconImg } from '../../utils/productConfig'

const HERO_COLORS = ['#FFE4EC', '#FFF0F5', '#FCE4EC']

export default function ProductPage() {
  const { theme } = useThemeContext()
  const [showModal, setShowModal] = useState(false)
  const [quantity, setQuantity] = useState(1)

  const params = Taro.getCurrentInstance().router?.params
  const productId = params?.id || ''
  const product = getProductById(productId)

  if (!product) {
    return (
      <View className={`theme-${theme}`}>
        <View className='product-page'>
          <View className='page-header dashed-card mt-20'>
            <Text className='page-title'>商品未找到</Text>
          </View>
        </View>
      </View>
    )
  }

  const handleAddToList = () => {
    setQuantity(1)
    setShowModal(true)
  }

  const confirmAdd = () => {
    addDesign(product, quantity)
    setShowModal(false)
    Taro.showToast({ title: `已加入设计清单 x${quantity}`, icon: 'success' })
    setTimeout(() => Taro.navigateBack(), 1200)
  }

  const goToDIY = () => {
    Taro.navigateTo({
      url: `/pages/diy/index?source=product&productId=${product.id}&quantity=1`
    })
  }

  const modQty = (delta: number) => {
    setQuantity(q => Math.max(1, Math.min(99, q + delta)))
  }

  return (
    <View className={`theme-${theme}`}>
      <View className='product-page'>
        <ThemeToggle />

        <View className='page-header dashed-card mt-20'>
          <View className='star-badge' />
          <View className='flex-between'>
            <Text className='back-btn' onTap={() => Taro.navigateBack()}>←</Text>
            <Text className='page-title'>商品详情</Text>
            <View style={{ width: '60px' }} />
          </View>
        </View>

        {/* 轮播 Hero */}
        <View className='hero-section mt-20'>
          <Swiper
            className='hero-swiper'
            circular
            autoplay
            interval={3000}
            duration={500}
            indicatorDots
            indicatorColor='rgba(0,0,0,0.2)'
            indicatorActiveColor='#ff9a9e'
          >
            {product.images && product.images.length > 0 ? (
              product.images.map((img, idx) => (
                <SwiperItem key={idx}>
                  <View className='hero-card dashed-card'>
                    <View className='star-badge' />
                    <Image className='hero-image' src={img} mode='aspectFit' />
                  </View>
                </SwiperItem>
              ))
            ) : (
              HERO_COLORS.map((color, idx) => (
                <SwiperItem key={idx}>
                  <View className='hero-card dashed-card' style={{ background: color }}>
                    <View className='star-badge' />
                    <Image className='hero-icon-img' src={getProductIconImg(product)} mode='aspectFit' />
                    <Text className='hero-name'>{product.name}</Text>
                  </View>
                </SwiperItem>
              ))
            )}
          </Swiper>
        </View>

        {/* 基本信息 */}
        <View className='info-section dashed-card mt-20'>
          <View className='star-badge' />
          <View className='info-row'>
            <Text className='info-label'>单价</Text>
            <Text className='info-price'>¥{product.price}</Text>
          </View>
          <View className='info-row'>
            <Text className='info-label'>工期</Text>
            <Text className='info-value'>{product.leadTime}</Text>
          </View>
          <View className='info-row'>
            <Text className='info-label'>尺寸</Text>
            <Text className='info-value'>{product.mask.width} × {product.mask.height} px</Text>
          </View>
        </View>

        {/* 详细介绍 */}
        <View className='detail-section dashed-card mt-20'>
          <View className='star-badge' />
          <Text className='section-title'>商品介绍</Text>
          <Text className='detail-text'>{product.description}</Text>
        </View>

        {/* 底部操作栏 */}
        <View className='action-bar'>
          <View className='price-summary'>
            <Text className='summary-label'>起价</Text>
            <Text className='summary-price'>¥{product.price}</Text>
          </View>
          <View className='btn-outline' onTap={handleAddToList}>
            <Text>加入设计清单</Text>
          </View>
          <View className='btn-gradient' onTap={goToDIY}>
            <Text>立即下单</Text>
          </View>
        </View>

        {/* 安全区占位（防止内容被 action-bar 遮挡） */}
        <View className='safe-bottom-placeholder' />

        {/* 数量选择弹窗 */}
        {showModal && (
          <View className='modal-overlay'>
            <View className='modal-card dashed-card'>
              <View className='star-badge' />
              <Text className='modal-title'>加入设计清单</Text>
              <View className='modal-product'>
                <Image className='modal-icon-img' src={getProductIconImg(product)} mode='aspectFit' />
                <Text className='modal-name'>{product.name}</Text>
              </View>
              <View className='quantity-row'>
                <Text className='qty-label'>数量</Text>
                <View className='qty-control'>
                  <View className='qty-btn' onTap={() => modQty(-1)}>－</View>
                  <Text className='qty-num'>{quantity}</Text>
                  <View className='qty-btn' onTap={() => modQty(1)}>＋</View>
                </View>
              </View>
              <View className='modal-total'>
                <Text className='total-label'>小计</Text>
                <Text className='total-price'>¥{(product.price * quantity).toFixed(2)}</Text>
              </View>
              <View className='modal-actions'>
                <View className='btn-outline' onTap={() => setShowModal(false)}>
                  <Text>取消</Text>
                </View>
                <View className='btn-gradient' onTap={confirmAdd}>
                  <Text>确定</Text>
                </View>
              </View>
            </View>
          </View>
        )}
      </View>
    </View>
  )
}