// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .

package packages

import (
	"encoding/json"
	"errors"
	"fmt"
	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
	"github.com/TeaOSLab/EdgeCommon/pkg/userconfigs"
	"github.com/TeaOSLab/EdgeUser/internal/configloaders"
	"github.com/TeaOSLab/EdgeUser/internal/web/actions/actionutils"
	"github.com/TeaOSLab/EdgeUser/internal/web/actions/default/finance/financeutils"
	"github.com/iwind/TeaGo/types"
	"strings"
)

type ConfirmAction struct {
	actionutils.ParentAction
}

func (this *ConfirmAction) Init() {
	this.Nav("", "", "buy")
}

func (this *ConfirmAction) RunGet(params struct {
	PackageId int64
	RegionId  int64
	PeriodId  int64
	Count     int32
}) {
	// parameters
	this.Data["packageId"] = params.PackageId
	this.Data["regionId"] = params.RegionId
	this.Data["periodId"] = params.PeriodId

	// 检查权限
	config, err := configloaders.LoadCacheableUserPriceConfig()
	if err != nil {
		this.ErrorPage(err)
		return
	}
	if config == nil || !config.IsOn || config.EnablePlans || !config.EnableTrafficPackages {
		this.WriteString("管理员未开启相关配置")
		return
	}

	// package
	packageResp, err := this.RPC().TrafficPackageRPC().FindTrafficPackage(this.UserContext(), &pb.FindTrafficPackageRequest{TrafficPackageId: params.PackageId})
	if err != nil {
		this.ErrorPage(err)
		return
	}
	var p = packageResp.TrafficPackage
	if p == nil || !p.IsOn {
		this.NotFound("TrafficPackage", params.PackageId)
		return
	}
	this.Data["packageName"] = types.String(p.Size) + strings.ToUpper(p.Unit)

	// region
	regionResp, err := this.RPC().NodeRegionRPC().FindEnabledNodeRegion(this.UserContext(), &pb.FindEnabledNodeRegionRequest{NodeRegionId: params.RegionId})
	if err != nil {
		this.ErrorPage(err)
		return
	}
	var region = regionResp.NodeRegion
	if region == nil || !region.IsOn {
		this.NotFound("NodeRegion", params.RegionId)
		return
	}
	this.Data["regionName"] = region.Name

	// period
	periodResp, err := this.RPC().TrafficPackagePeriodRPC().FindTrafficPackagePeriod(this.UserContext(), &pb.FindTrafficPackagePeriodRequest{TrafficPackagePeriodId: params.PeriodId})
	if err != nil {
		this.ErrorPage(err)
		return
	}
	var period = periodResp.TrafficPackagePeriod
	if period == nil || !period.IsOn {
		this.NotFound("TrafficPackagePeriod", params.PeriodId)
		return
	}
	this.Data["periodName"] = types.String(period.Count) + userconfigs.TrafficPackagePeriodUnitName(period.Unit)

	// count
	if params.Count <= 0 {
		this.ErrorPage(errors.New("invalid 'count' parameter"))
		return
	}
	this.Data["count"] = params.Count

	// price
	priceResp, err := this.RPC().TrafficPackagePriceRPC().FindTrafficPackagePrice(this.UserContext(), &pb.FindTrafficPackagePriceRequest{
		TrafficPackageId:       params.PackageId,
		NodeRegionId:           params.RegionId,
		TrafficPackagePeriodId: params.PeriodId,
		Count:                  params.Count,
	})
	if err != nil {
		this.ErrorPage(err)
		return
	}
	if priceResp.Price == 0 {
		this.ErrorPage(errors.New("invalid parameters: could not retrieve price"))
		return
	}
	this.Data["amount"] = priceResp.Amount

	this.Show()
}

func (this *ConfirmAction) RunPost(params struct {
	PackageId int64
	RegionId  int64
	PeriodId  int64
	Count     int32

	MethodCode string
}) {
	// 检查权限
	config, err := configloaders.LoadCacheableUserPriceConfig()
	if err != nil {
		this.ErrorPage(err)
		return
	}
	if config == nil || !config.IsOn || config.EnablePlans || !config.EnableTrafficPackages {
		this.Fail("管理员未开启相关配置")
		return
	}

	// 检查参数
	if params.PackageId <= 0 {
		this.Fail("请选择流量包规格")
		return
	}
	if params.RegionId <= 0 {
		this.Fail("请选择区域")
		return
	}
	if params.PeriodId <= 0 {
		this.Fail("请选择有效期")
		return
	}
	if params.Count <= 0 {
		this.Fail("请选择数量")
		return
	}
	if params.Count > 20 {
		this.Fail("一次性最多只能购买20个")
		return
	}

	// period
	periodResp, err := this.RPC().TrafficPackagePeriodRPC().FindTrafficPackagePeriod(this.UserContext(), &pb.FindTrafficPackagePeriodRequest{TrafficPackagePeriodId: params.PeriodId})
	if err != nil {
		this.ErrorPage(err)
		return
	}
	var period = periodResp.TrafficPackagePeriod
	if period == nil || !period.IsOn {
		this.NotFound("TrafficPackagePeriod", params.PeriodId)
		return
	}

	// 检查价格
	priceResp, err := this.RPC().TrafficPackagePriceRPC().FindTrafficPackagePrice(this.UserContext(), &pb.FindTrafficPackagePriceRequest{
		TrafficPackageId:       params.PackageId,
		NodeRegionId:           params.RegionId,
		TrafficPackagePeriodId: params.PeriodId,
		Count:                  params.Count,
	})
	if err != nil {
		this.ErrorPage(err)
		return
	}

	if priceResp.Amount <= 0 {
		this.Fail("当前流量包没有设定价格，无法购买")
		return
	}
	var amount = priceResp.Amount

	this.Data["packageId"] = params.PackageId
	this.Data["regionId"] = params.RegionId
	this.Data["periodId"] = params.PeriodId
	this.Data["count"] = params.Count

	// 使用余额购买
	this.Data["success"] = false
	this.Data["orderCode"] = ""
	if params.MethodCode == "@balance" {
		balance, err := financeutils.FindUserBalance(this.UserContext())
		if err != nil {
			this.ErrorPage(err)
			return
		}
		if amount > balance {
			this.Fail("当前余额不足，需要：" + fmt.Sprintf("%.2f元", amount) + "，现有：" + fmt.Sprintf("%.2f元", balance) + " ，请充值后再试")
			return
		}

		// 直接购买
		_, err = this.RPC().UserTrafficPackageRPC().BuyUserTrafficPackage(this.UserContext(), &pb.BuyUserTrafficPackageRequest{
			UserId:                 this.UserId(),
			TrafficPackageId:       params.PackageId,
			NodeRegionId:           params.RegionId,
			TrafficPackagePeriodId: params.PeriodId,
			Count:                  params.Count,
		})
		if err != nil {
			this.ErrorPage(err)
			return
		}

		this.Data["success"] = true
		this.Success()
		return
	}

	// 生成订单
	var orderParams = &userconfigs.OrderTypeBuyTrafficPackageParams{
		PackageId:   params.PackageId,
		RegionId:    params.RegionId,
		PeriodId:    params.PeriodId,
		PeriodCount: period.Count,
		PeriodUnit:  period.Unit,
		Count:       params.Count,
	}
	orderParamsJSON, err := json.Marshal(orderParams)
	if err != nil {
		this.ErrorPage(err)
		return
	}

	resp, err := this.RPC().UserOrderRPC().CreateUserOrder(this.UserContext(), &pb.CreateUserOrderRequest{
		Type:            userconfigs.OrderTypeBuyTrafficPackage,
		OrderMethodCode: params.MethodCode,
		Amount:          amount,
		ParamsJSON:      orderParamsJSON,
	})
	if err != nil {
		this.ErrorPage(err)
		return
	}

	this.Data["orderCode"] = resp.Code

	this.Success()
}