package logic

import (
	"context"
	"errors"
	"time"

	"bj_power_mes/ent"
	"bj_power_mes/ent/dailyplan"
	"bj_power_mes/ent/workorder"
)

// parseDate 解析 yyyy-MM-dd 或标准时间
func parseDate(v string) (time.Time, error) {
	if t, err := time.ParseInLocation("2006-01-02", v, time.Local); err == nil {
		return t, nil
	}
	return time.ParseInLocation(time.RFC3339, v, time.Local)
}

type DailyPlanReq struct {
	Id           int    `json:"id"`
	OrderNo      string `json:"orderNo"`
	PlanDate     string `json:"planDate"`
	PlanQty      int    `json:"planQty"`
	CompletedQty int    `json:"completedQty"`
	Status       string `json:"status"`
}

// SaveDailyPlan 创建/更新日排产（同一 工单+日期 唯一）
func (s *Service) SaveDailyPlan(ctx context.Context, req DailyPlanReq, operator string) error {
	if req.OrderNo == "" || req.PlanDate == "" {
		return errors.New("工单号和排产日期必填")
	}
	// 校验：该工单所有日排产计划数量累计不得超过工单总数量(保存时合计，改小可、改大不超总量)
	wo, err := s.ctx.EntClient.WorkOrder.Query().Where(workorder.WorkOrderNo(req.OrderNo)).First(ctx)
	if err != nil {
		return errors.New("工单不存在")
	}
	if wo.Status == "DONE" || wo.Status == "CLOSED" {
		return errors.New("该工单已完成/关闭，不能排产")
	}
	cur, err := s.ctx.EntClient.DailyPlan.Query().
		Where(dailyplan.OrderNo(req.OrderNo)).All(ctx)
	if err != nil {
		return err
	}
	// 计算合计：同「工单+日期」的记录无论原状态如何，都以本次新值替换（只算一次），避免旧值+新值重复累计
	total := 0
	for _, p := range cur {
		if p.PlanDate == req.PlanDate {
			if p.CompletedQty > 0 {
				return errors.New("该排产日已有完工数量，不能修改计划数量")
			}
			total += req.PlanQty
			continue
		}
		total += p.PlanQty
	}
	if total > wo.Quantity {
		return errors.New("排产合计数量超过工单总数量，无法保存")
	}
	exist, err := s.ctx.EntClient.DailyPlan.Query().
		Where(dailyplan.OrderNo(req.OrderNo), dailyplan.PlanDate(req.PlanDate)).First(ctx)
	status := req.Status
	if status == "" {
		status = "PENDING"
	}
	if err == nil && exist != nil {
		_, err = s.ctx.EntClient.DailyPlan.UpdateOneID(exist.ID).
			SetOrderNo(req.OrderNo).SetPlanDate(req.PlanDate).SetPlanQty(req.PlanQty).SetStatus(status).Save(ctx)
		if err != nil {
			return err
		}
	} else {
		_, err = s.ctx.EntClient.DailyPlan.Create().
			SetOrderNo(req.OrderNo).SetPlanDate(req.PlanDate).SetPlanQty(req.PlanQty).
			SetStatus(status).SetOperator(operator).Save(ctx)
		if err != nil {
			return err
		}
	}
	s.ctx.EventLog.Write(ctx, "daily.plan.save", req.OrderNo, operator, "daily_plan", req.OrderNo, "保存日排产", map[string]any{"planDate": req.PlanDate, "planQty": req.PlanQty})
	return nil
}

// ListDailyPlans 按工单/日期查询日排产
func (s *Service) ListDailyPlans(ctx context.Context, orderNo, planDate string) ([]*ent.DailyPlan, error) {
	q := s.ctx.EntClient.DailyPlan.Query()
	if orderNo != "" {
		q = q.Where(dailyplan.OrderNo(orderNo))
	}
	if planDate != "" {
		q = q.Where(dailyplan.PlanDate(planDate))
	}
	return q.Order(ent.Desc(dailyplan.FieldPlanDate)).All(ctx)
}

// DeleteDailyPlan 删除一条日排产记录
func (s *Service) DeleteDailyPlan(ctx context.Context, id int) error {
	return s.ctx.EntClient.DailyPlan.DeleteOneID(id).Exec(ctx)
}