// pack-cookbook/pages/comboBuy.js
import util from '../../utils/util';
import App from '../../utils/api';
Page({

    /**
     * 页面的初始数据
     */
    data: {
        sid: '',
        details: {}, //上页面传入的套餐信息
        seller: {}, //商家信息
        couponArr: [], //本套餐可用的优惠券列表
        finalList: [], //勾选的券列表
        planPrice: '', //套餐价格
        memberPrice: '', //菜品原价
        discountPrice: '', //优惠金额
        actualPrice: '', //抵扣后价格
        couponSwitch: true, //本单使用优惠券开关
        dataStr: Date.now() * 1 / 1000,
    },
    couponModal: '',

    /**
     * 生命周期函数--监听页面加载
     */
    onLoad(options) {
        console.log('comboBuy options----', options);
        this.couponModal = this.selectComponent("#couponModal");
        let details = {};
        if (options.details) {
            details = JSON.parse(options.details);
        }
        let planPrice = details.plan_price || '';
        let memberPrice = details.member_price || details.menu_price || '';
        if (planPrice !== '') {
            planPrice = parseFloat(planPrice).toFixed(2);
        }
        if (memberPrice !== '') {
            memberPrice = parseFloat(memberPrice).toFixed(2);
        }
        this.setData({
            details,
            planPrice,
            memberPrice,
            actualPrice: planPrice || '0.00',
        })
        let sid = (details.seller && details.seller.sid) || options.sid || '';
        if (sid) {
            this.setData({
                sid
            })
            if (details.seller) {
                this.setData({
                    seller: details.seller
                })
            }
            this.getSellerDetailFun(sid)
        }
    },
    // 获取商家名称、照片
    getSellerDetailFun(sid) {
        App.Customer.GetSellerDetail({
            sid
        }).then(res => {
            let data = res.data;
            this.setData({
                seller: {
                    seller_image: data.seller_image,
                    sellername: data.sellername,
                    sid: data.id
                }
            })
            this.getCoupon()
        })
    },
    // 获取所有优惠券，只展示本套餐可用的
    getCoupon() {
        if (!this.data.sid) return;
        App.Activity.ActivityListByOpenid({
            sellerid: this.data.sid
        }).then(res => {
            if (res.ret == 200 && res.data && res.data.length > 0) {
                let list = res.data;
                list.forEach(detail => {
                    detail.exp_date = detail.exp_date ? util.determine(detail.exp_date) : '';
                    detail.arule = detail.arule ? util.determine(detail.arule) : '';
                    detail.expiration_date = detail.expiration_date ? util.determine(detail.expiration_date) : '';
                    detail.aexpiration = detail.aexpiration ? util.determine(detail.aexpiration) : '';
                    if (detail.arule) {
                        detail.accumulationShow = detail.arule.is_accumulation
                    }
                    if (detail.exp_date && detail.exp_date.week_data) {
                        let mor = this.hasConsecutiveSelect(detail.exp_date.week_data, '1').rArr.join('、')
                        let noon = this.hasConsecutiveSelect(detail.exp_date.week_data, '2').rArr.join('、')
                        let nig = this.hasConsecutiveSelect(detail.exp_date.week_data, '3').rArr.join('、')
                        if (mor) mor = '早餐：' + mor
                        if (noon) noon = '午餐：' + noon
                        if (nig) nig = '晚餐：' + nig
                        detail.morText = mor;
                        detail.noonText = noon;
                        detail.nigText = nig;
                    }
                    detail.checked = false;
                    detail.showCpupon = '0';
                    detail.cdate = detail.cdate * 1;
                    detail.useStime = '';
                    detail.useEtime = '';
                    let condition = detail.aexpiration || {};
                    if (condition.valid_forever === '0' && condition.stime && condition.etime) {
                        detail.useStime = condition.stime;
                        detail.useEtime = condition.etime;
                    }
                    if (condition.valid_forever === '1') {
                        detail.foreverText = '永久有效';
                    }
                    if (condition.valid_forever === '0' && condition.today) {
                        let obj = this.setTimeRange(detail.cdate, 0, parseInt(condition.today) - 1);
                        detail.useStime = obj.useStime;
                        detail.useEtime = obj.useEtime;
                    }
                    if (condition.valid_forever === '0' && condition.tomorrow) {
                        let obj = this.setTimeRange(detail.cdate, 1, condition.tomorrow * 1);
                        detail.useStime = obj.useStime;
                        detail.useEtime = obj.useEtime;
                    }
                    if (condition.valid_forever === '0' && condition.sday && condition.eday) {
                        let obj = this.setTimeRange(detail.cdate, parseInt(condition.sday) - 1, parseInt(condition.eday) - 1);
                        detail.useStime = obj.useStime;
                        detail.useEtime = obj.useEtime;
                    }
                    if ((detail.useStime > 0 && detail.useEtime > 0) || condition.valid_forever === '1') {
                        detail.endDateStr = condition.valid_forever == '1' ? '永久有效' : (util.unixtoTime(detail.useStime, 'YYYY-MM-DD') + '至' + util.unixtoTime(detail.useEtime, 'YYYY-MM-DD'));
                    }
                })
                // 过滤已过期的券
                list = list.filter(item => {
                    return (this.data.dataStr < (item.useEtime * 1) || item.aexpiration.valid_forever == '1');
                })
                // 判断券是否可用：满足套餐价格门槛的才显示
                let planPrice = parseFloat(this.data.planPrice) || 0;
                list = list.filter(item => {
                    let desc = parseFloat(item.desc) || 0;
                    return desc == 0 || planPrice >= desc;
                })
                // 相同aid的券合并成一张，用加减号选择张数
                let couponGroup = {};
                let couponList = [];
                list.forEach(item => {
                    let key = item.aid ? item.aid : item.activity_id
                    if (couponGroup[key]) {
                        couponGroup[key].num = (couponGroup[key].num * 1) + 1
                        couponGroup[key].activityIds.push(item.activity_id)
                    } else {
                        item.num = 1
                        item.checkedNum = 0
                        item.groupKey = key
                        item.activityIds = [item.activity_id]
                        couponGroup[key] = item
                        couponList.push(item)
                    }
                })
                list = couponList
                // 单次使用数量限制，0表示不限制，默认0
                list.forEach(item => {
                    let useLimit = item.single_use_limit ? (item.single_use_limit * 1) : 0
                    item.maxNum = (useLimit > 0 && useLimit < item.num) ? useLimit : item.num
                    item.showCpupon = '1'
                    item.canCheck = '1'
                    item.isOk = '1'
                })
                // 面额大的排在前面
                list.sort((a, b) => (parseFloat(b.price) || 0) - (parseFloat(a.price) || 0))
                console.log('comboBuy couponArr----', list);
                this.setData({
                    couponArr: list
                })
                if (this.data.couponSwitch) {
                    this.colationData()
                }
            } else {
                this.setData({
                    couponArr: [],
                    discountPrice: '',
                    actualPrice: this.data.planPrice || '0.00',
                })
            }
        })
    },
    // 打开优惠券弹框
    showCouponModal() {
        this.couponModal.showModal()
    },
    // 关闭优惠券弹框
    closeCouponModal() {
        this.couponModal.closeModal()
    },
    // 使用券开关
    switchChange(event) {
        this.setData({
            couponSwitch: event.detail.value,
        })
        if (this.data.couponSwitch) {
            this.colationData()
        } else {
            let list = this.data.couponArr;
            list.forEach(i => {
                i.checkedNum = 0;
                i.showCpupon = '1';
                i.canAdd = '1';
            })
            this.setData({
                couponArr: list,
                finalList: [],
                discountPrice: '',
                actualPrice: this.data.planPrice || '0.00',
            })
        }
    },
    // 加减号选择券的张数
    changeCouponNum(e) {
        let type = e.currentTarget.dataset.type;
        let aid = e.currentTarget.dataset.aid;
        const list = this.data.couponArr
        let item = list.find(i => i.aid == aid)
        if (!item) return
        if (type == 'plus') {
            if (item.canAdd != '1') return
            item.checkedNum = (item.checkedNum * 1) + 1
        }
        if (type == 'minus') {
            if (item.checkedNum <= 0) return
            item.checkedNum = (item.checkedNum * 1) - 1
        }
        this.refreshCouponState()
    },
    // 加减号中间输入框
    numInputChange(e) {
        let aid = e.currentTarget.dataset.aid;
        let val = (e.detail.value || '').replace(/[^\d]/g, '');
        const list = this.data.couponArr
        let item = list.find(i => i.aid == aid)
        if (!item) return
        let maxSelect = this.getMaxSelectNum(item)
        let num = val === '' ? 0 : parseInt(val, 10)
        if (isNaN(num)) num = 0
        if (num > maxSelect) num = maxSelect
        item.checkedNum = num
        this.refreshCouponState()
    },
    // 计算某张券当前最多可以选到的张数
    getMaxSelectNum(item) {
        const list = this.data.couponArr
        let inputValue = parseFloat(this.data.planPrice)
        let descStr = 0
        let val = 0
        list.forEach(i => {
            if (i.checkedNum > 0 && i.aid != item.aid) {
                let d = parseFloat(i.desc) || 0
                if (d > 0) descStr += d * i.checkedNum
                val += parseFloat(i.price) * i.checkedNum
            }
        })
        let itemDesc = parseFloat(item.desc) || 0
        let itemPrice = parseFloat(item.price)
        let maxSelect = item.maxNum
        if (item.accumulationShow != '1' && maxSelect > 1) maxSelect = 1
        if (inputValue > 0) {
            if (itemDesc > 0) {
                let byDesc = Math.floor((inputValue - descStr) / itemDesc)
                if (byDesc < maxSelect) maxSelect = byDesc
            } else {
                if (descStr >= inputValue) {
                    maxSelect = 0
                } else {
                    let byPrice = Math.floor((inputValue - val) / itemPrice)
                    if (byPrice < maxSelect) maxSelect = byPrice
                }
            }
        }
        if (maxSelect < 0) maxSelect = 0
        return maxSelect
    },
    // 根据选择的券张数刷新券的可选状态
    refreshCouponState() {
        const list = this.data.couponArr
        let currentCoupon = '0';
        let inputValue = parseFloat(this.data.planPrice)
        let val = 0;
        let descStr = 0;
        list.forEach(item => {
            if (item.checkedNum > 0) {
                val += parseFloat(item.price) * item.checkedNum
                let itemDesc = parseFloat(item.desc) || 0
                if (itemDesc > 0) {
                    descStr += itemDesc * item.checkedNum
                }
                if (item.accumulationShow != '1') {
                    currentCoupon = '2'
                } else {
                    currentCoupon = '1'
                }
            }
        })
        if (currentCoupon == '0') {
            list.forEach(item => {
                if (item.canCheck == "1") {
                    item.showCpupon = '1';
                }
            })
        }
        if (currentCoupon == '2') {
            list.map((item) => {
                if (item.checkedNum > 0) {
                    item.showCpupon = '1'
                } else {
                    item.showCpupon = '0'
                }
            })
        }
        if (currentCoupon == '1') {
            list.forEach(item => {
                if (item.checkedNum > 0 || (item.accumulationShow == "1" && parseFloat(item.price) <= (inputValue - val) && (((parseFloat(item.desc) || 0) > 0 && (inputValue - descStr) >= parseFloat(item.desc)) || ((parseFloat(item.desc) || 0) === 0 && descStr < inputValue)))) {
                    item.showCpupon = '1';
                } else {
                    item.showCpupon = '0';
                }
            })
        }
        let finalList = []
        list.forEach(item => {
            if (item.checkedNum > 0) {
                for (let k = 0; k < item.checkedNum; k++) {
                    finalList.push({
                        ...item,
                        activity_id: item.activityIds[k]
                    })
                }
            }
        })
        this.updateCanAdd()
        let discountPrice = 0;
        finalList.forEach(i => {
            discountPrice += parseFloat(i.price)
        })
        discountPrice = discountPrice.toFixed(2)
        let actualPrice = (inputValue - discountPrice).toFixed(2)
        if (parseFloat(actualPrice) < 0) actualPrice = '0.00'
        this.setData({
            couponArr: list,
            finalList,
            discountPrice: discountPrice == '0.00' ? '' : discountPrice,
            actualPrice,
        })
    },
    // 计算每张券还能不能继续加
    updateCanAdd() {
        const list = this.data.couponArr
        let inputValue = parseFloat(this.data.planPrice)
        let descStr = 0
        let val = 0
        list.forEach(item => {
            if (item.checkedNum > 0) {
                let itemDesc = parseFloat(item.desc) || 0
                let itemPrice = parseFloat(item.price)
                if (itemDesc > 0) descStr += itemDesc * item.checkedNum
                val += itemPrice * item.checkedNum
            }
        })
        list.forEach(item => {
            item.canAdd = '0'
            let maxSelect = item.accumulationShow == '1' ? item.maxNum : 1
            if (item.showCpupon == '1' && item.checkedNum < maxSelect) {
                let itemDesc = parseFloat(item.desc) || 0
                let itemPrice = parseFloat(item.price)
                if (itemDesc > 0) {
                    if (descStr + itemDesc <= inputValue) item.canAdd = '1'
                } else {
                    if (descStr < inputValue && val + itemPrice <= inputValue) item.canAdd = '1'
                }
            }
        })
    },
    // 点确认选择
    checkCertificate() {
        this.closeCouponModal()
        let list = this.data.couponArr;
        let price = 0;
        list.forEach(i => {
            if (i.checkedNum > 0) {
                price += parseFloat(i.price) * i.checkedNum
            }
        })
        let planPrice = parseFloat(this.data.planPrice) || 0;
        let actualPrice = (planPrice - price).toFixed(2)
        if (parseFloat(actualPrice) < 0) actualPrice = '0.00'
        price = price.toFixed(2)
        this.setData({
            couponSwitch: price != '0.00',
            discountPrice: price == '0.00' ? '' : price,
            actualPrice,
        })
    },
    // 自动勾选最优惠券组合
    colationData() {
        let list = this.data.couponArr;
        if (!list.length) {
            this.setData({
                discountPrice: '',
                actualPrice: this.data.planPrice || '0.00',
            })
            return
        }
        let obj = this.findBestCoupons(list);
        this.setData({
            couponArr: obj.arr,
        })
        this.refreshCouponState()
    },
    // 最优惠的消费券组合
    findBestCoupons(arr) {
        const amount = parseFloat(this.data.planPrice) || 0;
        const validCoupons = arr.filter(coupon => (coupon.isOk == '1' && parseFloat(coupon.desc) <= amount) && amount >= parseFloat(coupon.price));
        validCoupons.sort((a, b) => parseFloat(b.price) - parseFloat(a.price));
        arr.forEach(item => {
            const isValid = validCoupons.some(validCoupon => validCoupon.activity_id == item.activity_id);
            item.canCheck = isValid ? '1' : '0';
            item.checkedNum = 0;
            item.showCpupon = isValid ? '1' : '0';
        });
        let stackingCoupons = validCoupons.filter(i => i.accumulationShow == '1')
        let list1 = [];
        let list2 = [];
        let finalList = [];
        let selectCount = {};
        stackingCoupons.sort((a, b) => {
            if (a.desc === '0' || a.desc === '') return -1;
            if (b.desc === '0' || b.desc === '') return 1;
            if (parseFloat(b.price) !== parseFloat(a.price)) return parseFloat(b.price) - parseFloat(a.price);
            return parseFloat(b.desc) - parseFloat(a.desc);
        });
        let thresholdDescSum = 0
        let maxThresholdValue = 0
        let thresholdCoupons = stackingCoupons.filter(coupon => (parseFloat(coupon.desc) || 0) > 0)
        thresholdCoupons.sort((a, b) => {
            if (parseFloat(b.desc) !== parseFloat(a.desc)) return parseFloat(b.desc) - parseFloat(a.desc)
            return parseFloat(b.price) - parseFloat(a.price)
        })
        thresholdCoupons.forEach(coupon => {
            let couponDesc = parseFloat(coupon.desc) || 0
            let couponPrice = parseFloat(coupon.price)
            let maxCopies = Math.floor((amount - thresholdDescSum) / couponDesc)
            if (maxCopies > coupon.maxNum) maxCopies = coupon.maxNum
            if (maxCopies > 0) {
                selectCount[coupon.aid] = maxCopies
                thresholdDescSum += couponDesc * maxCopies
                maxThresholdValue += couponPrice * maxCopies
            }
        })
        list1 = stackingCoupons.filter(i => (selectCount[i.aid] || 0) > 0)
        let noDescValue = 0
        let noDescCount = {}
        stackingCoupons.forEach(coupon => {
            let couponDesc = parseFloat(coupon.desc) || 0
            let couponPrice = parseFloat(coupon.price)
            if (couponDesc === 0 && couponPrice > 0) {
                let num = Math.floor((amount - noDescValue) / couponPrice)
                if (num > coupon.maxNum) num = coupon.maxNum
                if (num > 0) {
                    noDescCount[coupon.aid] = num
                    noDescValue += couponPrice * num
                }
            }
        })
        let maxStackableValue = maxThresholdValue
        if (thresholdDescSum < amount) {
            stackingCoupons.forEach(coupon => {
                let couponDesc = parseFloat(coupon.desc) || 0
                let couponPrice = parseFloat(coupon.price)
                if (couponDesc === 0 && couponPrice > 0) {
                    let num = Math.floor((amount - maxStackableValue) / couponPrice)
                    if (num > coupon.maxNum) num = coupon.maxNum
                    if (num > 0) {
                        selectCount[coupon.aid] = num
                        maxStackableValue += couponPrice * num
                    }
                }
            })
            list1 = stackingCoupons.filter(i => (selectCount[i.aid] || 0) > 0)
        } else if (noDescValue > maxThresholdValue) {
            list1 = stackingCoupons.filter(i => (noDescCount[i.aid] || 0) > 0)
            selectCount = noDescCount
            maxStackableValue = noDescValue
        } else if (noDescValue == maxThresholdValue && noDescValue > 0) {
            let listThreshold = stackingCoupons.filter(i => (selectCount[i.aid] || 0) > 0)
            let listNoDesc = stackingCoupons.filter(i => (noDescCount[i.aid] || 0) > 0)
            let min1 = listThreshold.length > 0 ? Math.min(...listThreshold.map(item => item.useEtime)) : Infinity
            let min2 = listNoDesc.length > 0 ? Math.min(...listNoDesc.map(item => item.useEtime)) : Infinity
            if (min2 < min1) {
                list1 = listNoDesc
                selectCount = noDescCount
            }
        }
        let stackList = list1
        let stackCount = selectCount
        let maxNonStackableValue = 0
        validCoupons.forEach(coupon => {
            if (coupon.accumulationShow != '1') {
                const discountAmount = parseFloat(coupon.price);
                const finalAmount = amount - discountAmount;
                if (finalAmount > 0 || finalAmount == 0) {
                    if (maxNonStackableValue < discountAmount) {
                        maxNonStackableValue = discountAmount
                        list2 = [{ ...coupon }]
                    }
                }
            }
        });
        if (maxStackableValue > maxNonStackableValue) {
            finalList = stackList
        } else if (maxStackableValue < maxNonStackableValue) {
            finalList = list2
            stackCount = {}
            if (list2[0]) stackCount[list2[0].aid] = 1
        } else {
            let copiedList1 = JSON.parse(JSON.stringify(stackList));
            let copiedList2 = JSON.parse(JSON.stringify(list2));
            let minList1 = copiedList1.length > 0 ? Math.min(...copiedList1.map(item => item.useEtime)) : Infinity;
            let minList2 = copiedList2.length > 0 ? Math.min(...copiedList2.map(item => item.useEtime)) : Infinity;
            if (minList1 <= minList2) {
                finalList = stackList
            } else {
                finalList = list2
                stackCount = {}
                if (list2[0]) stackCount[list2[0].aid] = 1
            }
        }
        let discountPrice = 0;
        finalList.forEach(coupon => {
            let target = arr.findIndex(obj => obj.aid === coupon.aid || obj.activity_id === coupon.activity_id);
            if (target > -1) {
                arr[target].showCpupon = '1';
                arr[target].checkedNum = stackCount[coupon.aid] || 1;
                discountPrice += parseFloat(coupon.price) * (stackCount[coupon.aid] || 1);
            }
        });
        finalList = []
        arr.forEach(item => {
            if (item.checkedNum > 0) {
                for (let k = 0; k < item.checkedNum; k++) {
                    finalList.push({
                        ...item,
                        activity_id: item.activityIds[k]
                    })
                }
            }
        })
        discountPrice = discountPrice.toFixed(2)
        return {
            arr,
            discountPrice,
            finalList,
        };
    },
    // 处理优惠券不可用日期数据
    hasConsecutiveSelect(arr, type) {
        let firstTitle = null;
        let lastTitle = null;
        let rArr = []
        let num = 0
        for (let i = 0; i < arr.length; i++) {
            let str = type == '1' ? arr[i].selectMor : type == '2' ? arr[i].selectNoon : type == '3' ? arr[i].selectNig : '';
            if (str) {
                rArr.push(arr[i].title)
                num++
                if (num == 1) {
                    firstTitle = arr[i].title
                }
                if (num >= 5) {
                    lastTitle = arr[i].title
                }
                if (num >= 5 && i >= (arr.length - 1)) {
                    let fi = rArr.findIndex((item) => {
                        return item == firstTitle
                    })
                    rArr.splice(fi, num, firstTitle + '至' + lastTitle)
                    num = 0
                }
            } else {
                if (num < 5) {
                    num = 0
                    firstTitle = null;
                    lastTitle = null;
                } else {
                    let fi = rArr.findIndex((item) => {
                        return item == firstTitle
                    })
                    rArr.splice(fi, num, firstTitle + '至' + lastTitle)
                    num = 0
                }
            }
        }
        return {
            rArr,
            lastTitle,
            firstTitle
        };
    },
    // 计算免费券有效期的起始、结束日期
    setTimeRange(cdate, startOffset, endOffset) {
        const startDate = new Date((cdate + startOffset * 86400) * 1000);
        startDate.setHours(0, 0, 0, 0);
        let useStime = startDate.getTime() / 1000
        const endDate = new Date((cdate + endOffset * 86400) * 1000);
        endDate.setHours(23, 59, 59, 0);
        let useEtime = endDate.getTime() / 1000
        return { useStime, useEtime };
    },
    // 支付（暂未接入支付流程，先占位）
    submitPay() {
        wx.showToast({
            title: '支付功能开发中',
            icon: 'none',
        })
    },

    onReady() {},
    onShow() {},
    onHide() {},
    onUnload() {},
    onPullDownRefresh() {},
    onReachBottom() {},
    onShareAppMessage() {}
})