import { fetchProductDetail } from '@/services/api/goods.js'
import { fetchCouponListByProductId } from '@/services/api/coupon.js'
import store from '@/store/index.js'

/* 获取产品活动类型 (拼团 活动价 限时特价) */
export function generateActivityType(productData) {
    const { collageStatus = 0, activeStatus = 0, discountStatus = 0 } = productData
    // 拼团价
    if (collageStatus > 0) {
        return 'group' // 拼团价
    }
    // 限时活动
    else if (discountStatus > 0) {
        return 'time-limit'
    }
    // 普通活动价
    else if (activeStatus > 0) {
        return 'activity'
    }
    // 普通商品
    return 'normal' // 普通价
}

/* 获取产品价格类型 */
export function generatePriceType(productData) {
    const { couponStatus = 0, collageStatus = 0, activeStatus = 0, discountStatus = 0, couponId } = productData
    // 拼团价
    if (collageStatus > 0) {
        if (couponStatus === 1 && couponId) {
            return 'groupWithCoupon' // 拼团券后价
        } else {
            return 'group' // 拼团价
        }
    }
    // 限时活动
    else if (discountStatus > 0 || activeStatus > 0) {
        if (couponStatus === 1 && couponId) {
            return 'activityWithCoupon' // 券后价
        } else {
            return 'normal' // 限时活动价格
        }
    }
    // 无活动价
    else {
        if (couponStatus === 1 && couponId) {
            return 'normalWithCoupon' // 普通券后价
        } else {
            return 'normal' // 普通价
        }
    }
}

/* 导航栏按钮类别 */
const navbarButtonGroup = {
    // 仅拼团
    group: {
        left: ['单独购买', '￥1000.00'],
        right: ['拼团购买', '￥1000.00']
    },

    // 拼团 + 优惠券
    groupWithCoupon: {
        left: ['领券单独购买', '￥1000.00'],
        right: ['领券拼团购买', '￥1000.00']
    },

    // 限时活动 / 活动价 + 优惠券
    activityWithCoupon: {
        left: ['加入购物车'],
        right: ['领券购买', '￥1000.00']
    },

    // 限时活动 / 活动价 + 优惠券
    normalWithCoupon: {
        left: ['加入购物车'],
        right: ['领券购买', '￥1000.00']
    },

    // 普通方式 不使用优惠券
    normal: {
        left: ['加入购物车'],
        right: ['立即购买']
    }
}

/* 导航按钮文本 */
export function generateNavbarButtonText(productData) {
    const { priceType } = productData
    const navbarButton = navbarButtonGroup[priceType]
    // 拼团券后价购买
    if (priceType === 'groupWithCoupon') {
        navbarButton.left[1] = `￥${productData.normalCouponPrice.toFixed(2)}`
        navbarButton.right[1] = `￥${productData.couponPrice.toFixed(2)}`
    }
    // 拼团价购买
    else if (priceType === 'group') {
        navbarButton.left[1] = `￥${productData.normalPrice.toFixed(2)}`
        navbarButton.right[1] = `￥${productData.price.toFixed(2)}`
    }
    // 活动价券后价购买（限时特价|普通活动）
    else if (priceType === 'activityWithCoupon') {
        navbarButton.right[1] = `￥${productData.couponPrice.toFixed(2)}`
    }
    // 普通价券后价购买
    else if (priceType === 'normalWithCoupon') {
        navbarButton.right[1] = `￥${productData.couponPrice.toFixed(2)}`
    } else {
        navbarButton.right[1] = ''
    }
    return navbarButton
}

/* 生成导航菜单类型 */
export function generateNavbarType(productInfo) {
    const { couponStatus = 0, collageStatus = 0, activeStatus = 0, discountStatus = 0 } = productInfo
    // 拼团价
    if (collageStatus > 0) {
        if (couponStatus === 1) {
            return 'groupWithCoupon' // 拼团券后价
        } else {
            return 'group' // 拼团价
        }
    }
    // 限时活动
    else if (discountStatus > 0 || activeStatus > 0) {
        if (couponStatus === 1) {
            return 'activityWithCoupon' // 券后价
        } else {
            return 'normal' // 限时活动价格
        }
    }
    // 无活动价
    else {
        if (couponStatus === 1) {
            return 'normalWithCoupon' // 普通券后价
        } else {
            return 'normal' // 普通价
        }
    }
}

/* 处理商品信息 */
function generateProductInfo(product) {
    if (!product) return product
    // 商品活动类型
    product.activityType = generateActivityType(product)
    product.priceType = generatePriceType(product)
    product.skus = product.skus.map(sku => {
        sku.activityType = generateActivityType(sku)
        sku.priceType = generatePriceType(sku)
        return sku
    })
    return product
}

/* 创建优惠券 */
function generateCoupon(coupon) {
    const obj = Object.assign({}, coupon)
    // 添加标题
    if (coupon.noThresholdFlag > 0) {
        obj.couponTitle = `减￥${coupon.couponAmount}元`
    } else {
        obj.couponTitle = `满￥${coupon.touchPrice}元减￥${coupon.couponAmount}元`
    }
    // 添加优惠券状态
    if (obj.useStatus === 0) {
        obj.controlType = 'receive'
    } else if (obj.useStatus === 1) {
        obj.couponStatus = 'received'
        obj.controlType = 'search'
    }
    return obj
}

/* 获取商品详情 */
export async function fetchPorductInfo(productId) {
    try {
        const userId = store.getters.userId
        const res = await fetchProductDetail({ productId, userId })
        return generateProductInfo(res.data)
    } catch (e) {
        console.log(e)
    }
}

/* 获取商品可用优惠券 */
export async function fetchCouponListByProduct(productId) {
    try {
        const userId = store.getters.userId
        const res = await fetchCouponListByProductId({ productId, userId })
        return res.data.map(coupon => generateCoupon(coupon))
    } catch (e) {
        console.log(e)
    }
}