package maintainance

import (
	"context"
	"encoding/json"
	"fmt"
	"time"

	"adm-vehicle-style/consts"
	"adm-vehicle-style/errors"
	"adm-vehicle-style/model"
	v1 "adm-vehicle-style/pb/v1"

	"git.getensh.com/common/gopkgsv2/database"
	"git.getensh.com/common/gopkgsv2/logger"
	"go.uber.org/zap"
	"google.golang.org/grpc/status"
	"gorm.io/gorm"
)

func Update(ctx context.Context, req *v1.UpdateMaintainManualRequest) (reply *v1.EmptyReply, err error) {
	reply = &v1.EmptyReply{}
	defer func() {
		if r := recover(); r != nil {
			err = fmt.Errorf("%+v", r)
			e := &status.Status{}
			if er := json.Unmarshal([]byte(err.Error()), e); er != nil {
				logger.Error("err",
					zap.String("system_err", err.Error()),
					zap.Stack("stacktrace"))
			}
		}
	}()

	// 获取maintain_title
	title, err := model.NewMaintainTitleModel().Get(database.DB().Where("style_id = ?", req.StyleId))
	if err != nil && err != gorm.ErrRecordNotFound {
		return nil, errors.SystemError
	}

	// 判断是否插入机油
	info, err := model.NewMaintainDetailModel().Get(database.DB().Where("style_id = ? AND item_id = ?", req.StyleId, consts.Oil))
	if err != nil && err != gorm.ErrRecordNotFound {
		return nil, errors.SystemError
	}

	var (
		hasOil bool
	)

	if err == nil && info != nil && info.ID != 0 {
		hasOil = true
	}

	var (
		tx = database.DB().Begin()
	)

	defer func() {
		if err != nil {
			tx.Rollback()
			return
		}

		tx.Commit()
	}()

	if req.Id == 0 {
		insert := model.GdMaintainDetail{
			StyleId:   req.StyleId,
			ItemId:    req.ItemId,
			StartMile: req.StartMile,
			MileCycle: req.MileCycle,
			StartDate: req.StartDate,
			DateCycle: req.DateCycle,
			CreatedAt: time.Now(),
			UpdatedAt: time.Now(),
		}

		if err := model.NewMaintainDetailModel().Insert(tx, &insert); err != nil {
			return reply, errors.SystemError
		}
	} else {
		values := map[string]interface{}{
			"start_mile": req.StartMile,
			"mile_cycle": req.MileCycle,
			"start_date": req.StartDate,
			"date_cycle": req.DateCycle,
			"item_id":    req.ItemId,
			"updated_at": time.Now().Format("2006-01-02 15:04:05"),
		}

		if err := model.NewMaintainDetailModel().Update(tx.Where("id = ?", req.Id), values); err != nil {
			return reply, errors.SystemError
		}
	}

	// 以前插入机油，直接结束, 且当次插入不是机油
	if hasOil && req.ItemId != consts.Oil {
		return reply, nil
	}

	// 如果此条为机油
	if req.ItemId == consts.Oil {
		if title == nil || title.ID == 0 {
			// 没有title
			title = &model.GdMaintainTitle{
				StartMile:            req.StartMile,
				StartDate:            req.StartDate,
				StyleId:              req.StyleId,
				MaintainMileMinCycle: req.MileCycle,
				MaintainDateMinCycle: req.DateCycle,
				RepairCycle:          req.MileCycle,
				WashCycle:            req.MileCycle,
				CreatedAt:            time.Now(),
				UpdatedAt:            time.Now(),
			}

			if err := model.NewMaintainTitleModel().Insert(tx, title); err != nil {
				return reply, errors.SystemError
			}
		} else {
			values := map[string]interface{}{
				"start_mile":              req.StartMile,
				"start_date":              req.StartDate,
				"maintain_mile_min_cycle": req.MileCycle,
				"maintain_date_min_cycle": req.DateCycle,
				"repair_cycle":            req.MileCycle,
				"wash_cycle":              req.MileCycle,
				"updated_at":              time.Now().Format("2006-01-02 15:04:05"),
			}

			if err := model.NewMaintainTitleModel().Update(tx.Where("id = ?", title.ID), values); err != nil {
				return reply, errors.SystemError
			}
		}

		return reply, nil
	}

	// 如果都不是
	// 获取已有的维保数据
	list, err := model.NewMaintainDetailModel().
		MaintainDetailList(database.DB().Where("style_id = ?", req.StyleId))
	if err != nil && err != gorm.ErrRecordNotFound {
		return nil, errors.SystemError
	}

	var (
		idx      int
		miniMile int64
	)

	list = append(list, model.MaintainDetailItem{
		StartMile: req.StartMile,
		MileCycle: req.MileCycle,
		StartDate: req.StartDate,
		DateCycle: req.DateCycle,
	})

	for k, v := range list {
		if miniMile == 0 {
			miniMile = v.MileCycle
			idx = k
		}
		if v.MileCycle != 0 && v.MileCycle < miniMile {
			miniMile = v.MileCycle
			idx = k
		}
	}

	if title == nil || title.ID == 0 {
		// 没有title
		title = &model.GdMaintainTitle{
			StyleId:              req.StyleId,
			StartMile:            list[idx].StartMile,
			StartDate:            list[idx].StartDate,
			MaintainMileMinCycle: list[idx].MileCycle,
			MaintainDateMinCycle: list[idx].DateCycle,
			RepairCycle:          list[idx].MileCycle,
			WashCycle:            list[idx].MileCycle,
			CreatedAt:            time.Now(),
			UpdatedAt:            time.Now(),
		}

		if err := model.NewMaintainTitleModel().Insert(tx, title); err != nil {
			return reply, errors.SystemError
		}
	} else {
		values := map[string]interface{}{
			"start_mile":              list[idx].StartMile,
			"start_date":              list[idx].StartDate,
			"maintain_mile_min_cycle": list[idx].MileCycle,
			"maintain_date_min_cycle": list[idx].DateCycle,
			"repair_cycle":            list[idx].MileCycle,
			"wash_cycle":              list[idx].MileCycle,
			"updated_at":              time.Now().Format("2006-01-02 15:04:05"),
		}
		if err := model.NewMaintainTitleModel().Update(tx.Where("id = ?", title.ID), values); err != nil {
			return reply, errors.SystemError
		}
	}

	return reply, nil
}

func min(a, b int64) int64 {
	if a < b {
		return a
	}

	return b
}