package logic

import (
	"context"
	"errors"

	"bj_power_mes/ent"
	"bj_power_mes/ent/dailyplan"
	"bj_power_mes/ent/materialrequest"
	"bj_power_mes/ent/workorder"
	"bj_power_mes/ent/workpiece"
)

type WorkOrderReq struct {
	Id            int    `json:"id"`
	WorkOrderNo   string `json:"workOrderNo"`
	ProductTypeId int    `json:"productTypeId"`
	ProductCode   string `json:"productCode"`
	ProductName   string `json:"productName"`
	Quantity      int    `json:"quantity"`
	ProcessSeq    string `json:"processSeq"`
	Status        string `json:"status"`
	PlanStart     string `json:"planStart"`
	PlanEnd       string `json:"planEnd"`
}

// CreateWorkOrder 创建工单
func (s *Service) CreateWorkOrder(ctx context.Context, req WorkOrderReq, operator string) error {
	if req.WorkOrderNo == "" {
		return errors.New("工单号不能为空")
	}
	if req.ProductTypeId == 0 {
		return errors.New("请选择产品类型")
	}
	if req.Quantity <= 0 {
		req.Quantity = 1
	}
	status := req.Status
	if status == "" {
		status = "CREATED"
	}
	if req.ProcessSeq == "" {
		req.ProcessSeq = FullProcessSeq
	} else if err := ValidateProcessSeq(req.ProcessSeq); err != nil {
		return err
	}
	req.ProcessSeq = NormalizeProcessSeq(req.ProcessSeq)
	b := s.ctx.EntClient.WorkOrder.Create().
		SetWorkOrderNo(req.WorkOrderNo).
		SetProductTypeId(req.ProductTypeId).
		SetProductCode(req.ProductCode).
		SetProductName(req.ProductName).
		SetQuantity(req.Quantity).
		SetProcessSeq(req.ProcessSeq).
		SetStatus(status)
	if req.PlanStart != "" {
		if t, err := parseDate(req.PlanStart); err == nil {
			b.SetPlanStart(t)
		}
	}
	if req.PlanEnd != "" {
		if t, err := parseDate(req.PlanEnd); err == nil {
			b.SetPlanEnd(t)
		}
	}
	if _, err := b.Save(ctx); err != nil {
		return err
	}
	s.ctx.EventLog.Write(ctx, "work.order.create", req.WorkOrderNo, operator, "work_order", req.WorkOrderNo, "创建工单", map[string]any{"quantity": req.Quantity})
	return nil
}

func (s *Service) UpdateWorkOrder(ctx context.Context, req WorkOrderReq, operator string) error {
	if req.Id == 0 {
		return errors.New("缺少 id")
	}
	if req.ProcessSeq != "" {
		if err := ValidateProcessSeq(req.ProcessSeq); err != nil {
			return err
		}
		req.ProcessSeq = NormalizeProcessSeq(req.ProcessSeq)
	}
	u := s.ctx.EntClient.WorkOrder.UpdateOneID(req.Id).SetProcessSeq(req.ProcessSeq)
	if req.Status != "" {
		u.SetStatus(req.Status)
	}
	if req.Quantity > 0 {
		u.SetQuantity(req.Quantity)
	}
	if req.ProductCode != "" {
		u.SetProductCode(req.ProductCode)
	}
	if req.ProductName != "" {
		u.SetProductName(req.ProductName)
	}
	if req.PlanStart != "" {
		if t, err := parseDate(req.PlanStart); err == nil {
			u.SetPlanStart(t)
		}
	}
	if req.PlanEnd != "" {
		if t, err := parseDate(req.PlanEnd); err == nil {
			u.SetPlanEnd(t)
		}
	}
	if err := u.Exec(ctx); err != nil {
		return err
	}
	wo, err := s.ctx.EntClient.WorkOrder.Get(ctx, req.Id)
	if err == nil {
		s.ctx.EventLog.Write(ctx, "work.order.update", wo.WorkOrderNo, operator, "work_order", wo.WorkOrderNo, "更新工单", map[string]any{"status": req.Status})
	}
	return nil
}

// ListWorkOrders 查询工单（支持工单号/状态/产品编码/产品名称 过滤）
func (s *Service) ListWorkOrders(ctx context.Context, orderNo, status, productCode, productName string) ([]*ent.WorkOrder, error) {
	q := s.ctx.EntClient.WorkOrder.Query()
	if orderNo != "" {
		q = q.Where(workorder.WorkOrderNoContains(orderNo))
	}
	if status != "" {
		q = q.Where(workorder.Status(status))
	}
	if productCode != "" {
		q = q.Where(workorder.ProductCodeContains(productCode))
	}
	if productName != "" {
		q = q.Where(workorder.ProductNameContains(productName))
	}
	return q.Order(ent.Desc(workorder.FieldID)).All(ctx)
}

func (s *Service) GetWorkOrder(ctx context.Context, id int) (*ent.WorkOrder, error) {
	if id > 0 {
		return s.ctx.EntClient.WorkOrder.Get(ctx, id)
	}
	return s.ctx.EntClient.WorkOrder.Query().Order(ent.Desc(workorder.FieldID)).First(ctx)
}

// 工单状态白名单
var workOrderStatuses = map[string]bool{
	"CREATED": true, "RELEASED": true, "IN_PROGRESS": true, "DONE": true,
	"PENDING": true, "CONFIRMED": true,
}

// SetWorkOrderStatus 工单状态流转（发布/开工/完工等），操作列快捷操作。
func (s *Service) SetWorkOrderStatus(ctx context.Context, id int, status, operator string) error {
	if id <= 0 {
		return errors.New("缺少 id")
	}
	if !workOrderStatuses[status] {
		return errors.New("非法的工单状态")
	}
	if err := s.ctx.EntClient.WorkOrder.UpdateOneID(id).SetStatus(status).Exec(ctx); err != nil {
		return err
	}
	if wo, err := s.ctx.EntClient.WorkOrder.Get(ctx, id); err == nil {
		s.ctx.EventLog.Write(ctx, "work.order.status", wo.WorkOrderNo, operator, "work_order", wo.WorkOrderNo, "变更工单状态", map[string]any{"status": status})
	}
	return nil
}

// DeleteWorkOrder 删除工单。
// 安全条件：① 状态仅限 已创建/待排产/已发布（未开始生产）；② 无日排产记录；
// ③ 未生成备料单；④ 无任何工件生产数据。
func (s *Service) DeleteWorkOrder(ctx context.Context, id int, operator string) error {
	if id <= 0 {
		return errors.New("缺少 id")
	}
	wo, err := s.ctx.EntClient.WorkOrder.Get(ctx, id)
	if err != nil {
		return errors.New("工单不存在")
	}
	if wo.Status != "CREATED" && wo.Status != "PENDING" && wo.Status != "RELEASED" {
		return errors.New("仅「已创建 / 待排产 / 已发布」状态的工单可删除，生产中或已完成的工单不能删除")
	}
	if n, err := s.ctx.EntClient.DailyPlan.Query().Where(dailyplan.OrderNo(wo.WorkOrderNo)).Count(ctx); err == nil && n > 0 {
		return errors.New("该工单已有日排产记录，请先删除对应排产后再删除工单")
	}
	if n, err := s.ctx.EntClient.MaterialRequest.Query().Where(materialrequest.OrderNo(wo.WorkOrderNo)).Count(ctx); err == nil && n > 0 {
		return errors.New("该工单已生成备料单，不能删除")
	}
	if n, err := s.ctx.EntClient.Workpiece.Query().Where(workpiece.OrderNo(wo.WorkOrderNo)).Count(ctx); err == nil && n > 0 {
		return errors.New("该工单已有工件生产数据，不能删除")
	}
	if err := s.ctx.EntClient.WorkOrder.DeleteOneID(id).Exec(ctx); err != nil {
		return err
	}
	s.ctx.EventLog.Write(ctx, "work.order.delete", wo.WorkOrderNo, operator, "work_order", wo.WorkOrderNo, "删除工单", map[string]any{"status": wo.Status})
	return nil
}