package eventloop

import (
	"context"
	"fmt"
	"log/slog"
	"strings"
	"time"

	"bj_power_mes/constants"
	"bj_power_mes/ent"
	"bj_power_mes/ent/equipment"
	"bj_power_mes/ent/equipmentslot"
	"bj_power_mes/ent/equipmenttype"
	"bj_power_mes/ent/job"
	"bj_power_mes/ent/recipestep"
)

// DoneSlotInfo 完成槽位信息
type DoneSlotInfo struct {
	JobID  int
	SlotNo int
}

// DBState ent 原子条件更新封装，仅由 event loop 使用
type DBState struct {
	client *ent.Client
}

func NewDBState(client *ent.Client) *DBState {
	return &DBState{client: client}
}

// CompleteStep 完成当前步骤，推进到下一步 stepId
func (d *DBState) CompleteStep(ctx context.Context, jobID int, nextStepID string, contextPatch map[string]any) error {
	update := d.client.Job.UpdateOneID(jobID).
		SetCurrentStepId(nextStepID).
		AddVersion(1)
	if contextPatch != nil {
		// 合并而非替换 context：先读取现有 context，再写入 patch
		jb, err := d.client.Job.Get(ctx, jobID)
		if err != nil {
			return fmt.Errorf("complete step: get job %d: %w", jobID, err)
		}
		ctxMap := jb.Context
		if ctxMap == nil {
			ctxMap = make(map[string]any)
		}
		for k, v := range contextPatch {
			ctxMap[k] = v
		}
		update = update.SetContext(ctxMap)
	}
	_, err := update.Save(ctx)
	return err
}

// FinishJob 工件终态。
// 使用事务确保 job 状态切换 + work_order 计数累加原子执行。
func (d *DBState) FinishJob(ctx context.Context, jobID, workOrderID int, terminalStatus constants.JobStatus) error {
	tx, err := d.client.Tx(ctx)
	if err != nil {
		return err
	}
	defer tx.Rollback()

	_, err = tx.Job.UpdateOneID(jobID).
		Where(job.StatusNotIn(
			constants.JobStatus_Completed,
			constants.JobStatus_Scrapped,
		)).
		SetStatus(terminalStatus).
		SetCompletedAt(time.Now()).
		ClearTempSlotNo().
		AddVersion(1).
		Save(ctx)
	if err != nil {
		slog.Error("finish job failed", "jobID", jobID, "error", err)
		return fmt.Errorf("finish job %d: %w", jobID, err)
	}

	if terminalStatus == constants.JobStatus_Completed {
		_, err = tx.WorkOrder.UpdateOneID(workOrderID).AddFinishedNum(1).Save(ctx)
		if err != nil {
			return fmt.Errorf("finish job %d: add finishedNum: %w", jobID, err)
		}
	} else if terminalStatus == constants.JobStatus_Scrapped {
		_, err = tx.WorkOrder.UpdateOneID(workOrderID).AddFailNum(1).Save(ctx)
		if err != nil {
			slog.Error("finish job: add failNum failed", "jobID", jobID, "error", err)
			return fmt.Errorf("finish job %d: add failNum: %w", jobID, err)
		}
		// 报废工件工人取出，清空位置
		_, err = tx.Job.UpdateOneID(jobID).
			SetPositionType("").
			SetPositionRefId("").
			Save(ctx)
		if err != nil {
			slog.Error("finish job: clear position failed", "jobID", jobID, "error", err)
			return fmt.Errorf("finish job %d: clear position: %w", jobID, err)
		}
	}

	return tx.Commit()
}

// SetEquipmentSlot 更新设备槽位状态，管理 OccupiedAt 生命周期：
//   - Occupied: 设置 OccupiedAt=now（记录占用时间）
//   - Done: 保留 OccupiedAt（工件仍在设备上）
//   - Empty: 清除 OccupiedAt + CurrentJobId（设备已释放）
func (d *DBState) SetEquipmentSlot(ctx context.Context, equipmentID, slotNo int, expectedStatus, nextStatus constants.SlotStatus, jobID int) error {
	update := d.client.EquipmentSlot.Update().
		Where(
			equipmentslot.EquipmentIdEQ(equipmentID),
			equipmentslot.SlotNoEQ(slotNo),
			equipmentslot.StatusEQ(expectedStatus),
		).
		SetStatus(nextStatus)

	switch nextStatus {
	case constants.SlotStatus_Occupied:
		update = update.SetCurrentJobId(jobID).SetOccupiedAt(time.Now())
	case constants.SlotStatus_Done:
		update = update.SetCurrentJobId(jobID)
	case constants.SlotStatus_Empty:
		update = update.ClearCurrentJobId().ClearOccupiedAt()
	}

	n, err := update.Save(ctx)
	if err != nil {
		return fmt.Errorf("set slot %d-%d: %w", equipmentID, slotNo, err)
	}
	if n == 0 {
		return fmt.Errorf("set slot %d-%d: expected %s", equipmentID, slotNo, expectedStatus)
	}
	return nil
}

// SetJobProcessing 设置 job 为 PROCESSING 状态并记录设备位置
func (d *DBState) SetJobProcessing(ctx context.Context, jobID, equipmentID, slotNo int) error {
	_, err := d.client.Job.UpdateOneID(jobID).
		SetStatus(constants.JobStatus_Processing).
		SetPositionType(constants.PositionType_OnEquipment).
		SetPositionRefId(fmt.Sprintf("%d:%d", equipmentID, slotNo)).
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set job %d processing: %w", jobID, err)
	}
	return nil
}

// SetJobOnEquipment 仅更新 job 位置到指定设备槽位，不修改状态/版本（用于设备内槽位转移场景）
func (d *DBState) SetJobOnEquipment(ctx context.Context, jobID, equipmentID, slotNo int) error {
	_, err := d.client.Job.UpdateOneID(jobID).
		SetPositionType(constants.PositionType_OnEquipment).
		SetPositionRefId(fmt.Sprintf("%d:%d", equipmentID, slotNo)).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set job %d on equipment %d slot %d: %w", jobID, equipmentID, slotNo, err)
	}
	return nil
}

// SetJobWaitingUnload 设置 job 为 WAITING_UNLOAD 状态
func (d *DBState) SetJobWaitingUnload(ctx context.Context, jobID int) error {
	_, err := d.client.Job.UpdateOneID(jobID).
		SetStatus(constants.JobStatus_WaitingUnload).
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set job %d waiting unload: %w", jobID, err)
	}
	return nil
}

// GetActiveJobs 获取所有非终态 job
func (d *DBState) GetActiveJobs(ctx context.Context) ([]*ent.Job, error) {
	return d.client.Job.Query().
		Where(job.StatusNotIn(
			constants.JobStatus_Completed,
			constants.JobStatus_Scrapped,
		)).Order(job.ByID()).
		All(ctx)
}

// AdvanceStep 推进到下一步：先合并 context → 匹配 nextStepBranches → 否则 nextStepDefault → 否则线性推进。
// 推进后若下一步是 Decision/Judge 则链式内联处理（纯规则评估，无需硬件动作），
// 直至遇到需要等待或 Worker 动作的步骤。返回 true 表示已是最后一步（job 已完成）。
func (d *DBState) AdvanceStep(ctx context.Context, jobID int, contextUpdates map[string]any, posType constants.PositionType, posRefID string) (bool, error) {
	maxIter := 100 // 安全上限，防止 Decision 步骤形成循环
	for i := 0; i < maxIter; i++ {
		jb, err := d.client.Job.Get(ctx, jobID)
		if err != nil {
			return false, fmt.Errorf("advance step: job %d not found: %w", jobID, err)
		}

		// 合并上下文更新（分支匹配前合并，让 contextUpdates 中的键可触发分支）
		ctxMap := jb.Context
		if ctxMap == nil {
			ctxMap = make(map[string]any)
		}
		for k, v := range contextUpdates {
			ctxMap[k] = v
		}

		// 确定下一步 stepId
		var nextStepID string
		currentStepID := jb.CurrentStepId

		// 1. 优先 nextStepBranches（条件跳步）
		if branchID, matched := d.resolveBranch(ctx, jb.RecipeId, currentStepID, ctxMap); matched {
			nextStepID = branchID
		} else {
			// 2. 其次 nextStepDefault（指定跳步）
			step, err := d.client.RecipeStep.Query().
				Where(recipestep.RecipeIdEQ(jb.RecipeId), recipestep.StepIdEQ(currentStepID)).
				First(ctx)
			if err != nil {
				return false, fmt.Errorf("advance step: query current step %s: %w", currentStepID, err)
			}
			if step.NextStepDefault != "" {
				nextStepID = step.NextStepDefault
			} else {
				// 3. 线性推进：当前 stepIndex + 1 → 找对应 stepId
				nextID, err := d.GetStepIDByIndex(ctx, jb.RecipeId, step.StepIndex+1)
				if err != nil {
					// 查询不到下一步 → 确认为最后一步则完成 job
					maxStep, maxErr := d.GetRecipeMaxStepIndex(ctx, jb.RecipeId)
					if maxErr != nil {
						return false, fmt.Errorf("advance step: get recipe max for job %d: %w", jobID, maxErr)
					}
					if step.StepIndex >= maxStep {
						if posType != "" || posRefID != "" {
							upd := d.client.Job.UpdateOneID(jobID).AddVersion(1)
							if posType != "" {
								upd = upd.SetPositionType(posType)
							}
							if posRefID != "" {
								upd = upd.SetPositionRefId(posRefID)
							}
							if _, err := upd.Save(ctx); err != nil {
								return false, err
							}
						}
						return true, d.FinishJob(ctx, jobID, jb.WorkOrderId, constants.JobStatus_Completed)
					}
					return false, fmt.Errorf("advance step: no next step after %s: %w", currentStepID, err)
				}
				nextStepID = nextID
			}
		}

		// 是否最后一步：查 nextStepID 对应的 stepIndex 与 maxStepIndex 比较
		nextIdx, err := d.GetStepIndexByStepID(ctx, jb.RecipeId, nextStepID)
		if err != nil {
			return false, fmt.Errorf("advance step: get index for %s: %w", nextStepID, err)
		}
		maxStep, err := d.GetRecipeMaxStepIndex(ctx, jb.RecipeId)
		if err != nil {
			return false, fmt.Errorf("advance step: get recipe max for job %d: %w", jobID, err)
		}
		isLast := nextIdx > maxStep

		// 最后一步：先写位置再 FinishJob，确保终态位置正确
		if isLast {
			if posType != "" || posRefID != "" {
				upd := d.client.Job.UpdateOneID(jobID).AddVersion(1)
				if posType != "" {
					upd = upd.SetPositionType(posType)
				}
				if posRefID != "" {
					upd = upd.SetPositionRefId(posRefID)
				}
				if _, err := upd.Save(ctx); err != nil {
					return false, err
				}
			}
			return true, d.FinishJob(ctx, jobID, jb.WorkOrderId, constants.JobStatus_Completed)
		}

		update := d.client.Job.UpdateOneID(jobID).
			SetCurrentStepId(nextStepID).
			SetContext(ctxMap).
			AddVersion(1)

		if posType != "" {
			update = update.SetPositionType(posType)
		}
		if posRefID != "" {
			update = update.SetPositionRefId(posRefID)
		}

		if _, err = update.Save(ctx); err != nil {
			return false, err
		}

		// 检查下一步是否可内联处理（Decision/Judge：纯规则评估 + 条件跳步）。
		// signal_true 类型需实时读 PLC，不适合内联，退回给 trySchedule → handleDecisionCandidate 处理。
		_, stepType, _, _, _, err := d.GetRecipeStepByID(ctx, jb.RecipeId, nextStepID)
		if err != nil || (stepType != constants.StepType_Decision && stepType != constants.StepType_Judge) {
			return false, err
		}
		if isSignalTrueDecision(d, ctx, jb.RecipeId, nextStepID) {
			return false, nil
		}

		// 计算 Decision 分支键，作为下一次迭代的 contextUpdates
		contextUpdates = evaluateDecisionForJob(d, ctx, jb.RecipeId, nextStepID, ctxMap, jb.WorkpieceNo)
		posType, posRefID = "", ""
	}
	return false, fmt.Errorf("advance step: exceeded max iterations for job %d, possible decision step cycle", jobID)
}

// evaluateDecisionForJob 读 processingParams 并调用 evaluateDecision 原地修改 ctxMap 副本，
// 返回新增的键值对作为下一轮 AdvanceStep 迭代的 contextUpdates。
func evaluateDecisionForJob(d *DBState, ctx context.Context, recipeID int, stepID string, ctxMap map[string]any, workpieceNo string) map[string]any {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(stepID)).
		First(ctx)
	if err != nil {
		return nil
	}
	params := step.ProcessingParams
	clone := make(map[string]any, len(ctxMap)+2)
	for k, v := range ctxMap {
		clone[k] = v
	}
	evaluateDecision(params, clone, workpieceNo, nil)
	result := make(map[string]any)
	for k, v := range clone {
		if _, ok := ctxMap[k]; !ok {
			result[k] = v
		}
	}
	return result
}

// isSignalTrueDecision 检查 Decision 步骤是否使用 signal_true 类型（需实时读 PLC，不能内联处理）
func isSignalTrueDecision(d *DBState, ctx context.Context, recipeID int, stepID string) bool {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(stepID)).
		First(ctx)
	if err != nil || step.ProcessingParams == nil {
		return false
	}
	dt, _ := step.ProcessingParams["decisionType"].(string)
	return dt == "signal_true"
}

// GetRecipeStep 获取工艺路线中指定步骤的信息
func (d *DBState) GetRecipeStep(ctx context.Context, recipeID, stepIndex int) (stepType constants.StepType, resourceType string, toolType string, stepName string, stepId string, err error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIndexEQ(stepIndex)).
		First(ctx)
	if err != nil {
		return "", "", "", "", "", fmt.Errorf("get recipe %d step %d: %w", recipeID, stepIndex, err)
	}
	return step.StepType, step.ResourceType, step.ToolType, step.StepName, step.StepId, nil
}

// GetStepProcessingParams 返回工序的 processingParams（用于 Decision 步骤的通用判定规则）
func (d *DBState) GetStepProcessingParams(ctx context.Context, recipeID, stepIndex int) (map[string]any, error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIndexEQ(stepIndex)).
		First(ctx)
	if err != nil {
		return nil, fmt.Errorf("get recipe %d step %d processing params: %w", recipeID, stepIndex, err)
	}
	if step.ProcessingParams == nil {
		return nil, nil
	}
	return step.ProcessingParams, nil
}

// GetStepProcessingParamsByID 根据 stepId 返回工序的 processingParams
func (d *DBState) GetStepProcessingParamsByID(ctx context.Context, recipeID int, stepID string) (map[string]any, error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(stepID)).
		First(ctx)
	if err != nil {
		return nil, fmt.Errorf("get recipe %d step %s processing params: %w", recipeID, stepID, err)
	}
	if step.ProcessingParams == nil {
		return nil, nil
	}
	return step.ProcessingParams, nil
}

// GetRecipeStepByID 根据 stepId 获取工艺路线中指定步骤的信息
func (d *DBState) GetRecipeStepByID(ctx context.Context, recipeID int, stepID string) (stepIndex int, stepType constants.StepType, resourceType string, toolType string, stepName string, err error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(stepID)).
		First(ctx)
	if err != nil {
		return 0, "", "", "", "", fmt.Errorf("get recipe %d step %s: %w", recipeID, stepID, err)
	}
	return step.StepIndex, step.StepType, step.ResourceType, step.ToolType, step.StepName, nil
}

// GetStepIDByIndex 根据 stepIndex 查找 stepId
func (d *DBState) GetStepIDByIndex(ctx context.Context, recipeID, stepIndex int) (string, error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIndexEQ(stepIndex)).
		First(ctx)
	if err != nil {
		return "", fmt.Errorf("get stepId by index %d: %w", stepIndex, err)
	}
	return step.StepId, nil
}

// getSortedStepIDs 返回按 stepIndex 排序的 stepId 列表
func (d *DBState) getSortedStepIDs(ctx context.Context, recipeID int) ([]string, error) {
	steps, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID)).
		Order(recipestep.ByStepIndex()).
		All(ctx)
	if err != nil {
		return nil, fmt.Errorf("get sorted step IDs for recipe %d: %w", recipeID, err)
	}
	ids := make([]string, len(steps))
	for i, s := range steps {
		ids[i] = s.StepId
	}
	return ids, nil
}

// GetStepIndexByStepID 根据 stepId 查找步骤的 stepIndex
func (d *DBState) GetStepIndexByStepID(ctx context.Context, recipeID int, stepID string) (int, error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(stepID)).
		First(ctx)
	if err != nil {
		return -1, fmt.Errorf("get step index by stepId %s: %w", stepID, err)
	}
	return step.StepIndex, nil
}

// resolveBranch 检查 nextStepBranches：遍历分支键，若在 ctxMap 中存在且 truthy，返回目标 stepId。
// 返回 (stepId, true) 表示匹配成功，("", false) 表示无匹配。
func (d *DBState) resolveBranch(ctx context.Context, recipeID int, currentStepID string, ctxMap map[string]any) (string, bool) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID), recipestep.StepIdEQ(currentStepID)).
		First(ctx)
	if err != nil || step.NextStepBranches == nil {
		return "", false
	}

	for key, val := range step.NextStepBranches {
		if cv, ok := ctxMap[key]; ok && isTruthy(cv) {
			stepID, ok := val.(string)
			if !ok {
				continue
			}
			return stepID, true
		}
	}
	return "", false
}

// isTruthy 判断 context 值为 truthy（bool true、非空字符串、非零数字）
func isTruthy(v any) bool {
	switch tv := v.(type) {
	case bool:
		return tv
	case string:
		return tv != ""
	case int:
		return tv != 0
	case float64:
		return tv != 0
	default:
		return v != nil
	}
}

// GetRecipeMaxStepIndex 获取工艺路线的最大步骤索引
func (d *DBState) GetRecipeMaxStepIndex(ctx context.Context, recipeID int) (int, error) {
	steps, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID)).
		All(ctx)
	if err != nil {
		return 0, fmt.Errorf("get recipe %d steps: %w", recipeID, err)
	}
	maxIdx := 0
	for _, s := range steps {
		if s.StepIndex > maxIdx {
			maxIdx = s.StepIndex
		}
	}
	return maxIdx, nil
}

// TempSlotCapacity 从 DB 查询暂存台槽位数，默认返回 8
func (d *DBState) TempSlotCapacity(ctx context.Context) int {
	equip, err := d.client.Equipment.Query().
		Where(equipment.HasEquipmentTypeWith(equipmenttype.CodeEQ(constants.EquipmentTypeCode_TempStore))).
		First(ctx)
	if err != nil || equip == nil {
		return 8
	}
	if equip.SlotCount > 0 {
		return equip.SlotCount
	}
	return 8
}

// parsePositionRef 解析 "equipmentID:slotNo" 格式
func parsePositionRef(ref string) (int, int) {
	equipStr, slotStr, ok := strings.Cut(ref, ":")
	if !ok {
		return 0, 0
	}
	var equipID, slotNo int
	fmt.Sscanf(equipStr, "%d", &equipID)
	fmt.Sscanf(slotStr, "%d", &slotNo)
	return equipID, slotNo
}

// RaiseAlarm 创建报警
func (d *DBState) RaiseAlarm(ctx context.Context, alarmCode, message string, level constants.AlarmLevel, equipmentID, jobID int, source string) error {
	_, err := d.client.Alarm.Create().
		SetAlarmCode(alarmCode).
		SetAlarmMessage(message).
		SetLevel(level).
		SetNillableEquipmentId(&equipmentID).
		SetNillableJobId(&jobID).
		SetSource(source).
		Save(ctx)
	return err
}

// FindDoneJobOnMachine 查找设备上状态为 DONE 的槽位对应的 jobID
func (d *DBState) FindDoneJobOnMachine(ctx context.Context, machineID int) (jobID int, slotNo int, found bool) {
	slot, err := d.client.EquipmentSlot.Query().
		Where(
			equipmentslot.EquipmentIdEQ(machineID),
			equipmentslot.StatusEQ(constants.SlotStatus_Done),
		).
		First(ctx)
	if err != nil || slot == nil {
		return 0, 0, false
	}
	return slotJobID(slot), slot.SlotNo, true
}

// FindAllDoneJobsOnMachine 查找设备上所有 DONE 状态的槽位
func (d *DBState) FindAllDoneJobsOnMachine(ctx context.Context, machineID int) []DoneSlotInfo {
	slots, _ := d.client.EquipmentSlot.Query().
		Where(
			equipmentslot.EquipmentIdEQ(machineID),
			equipmentslot.StatusEQ(constants.SlotStatus_Done),
		).
		All(ctx)
	var result []DoneSlotInfo
	for _, s := range slots {
		result = append(result, DoneSlotInfo{
			JobID:  slotJobID(s),
			SlotNo: s.SlotNo,
		})
	}
	return result
}

// CreateManualAction 创建人工恢复动作
func (d *DBState) CreateManualAction(ctx context.Context, actionType constants.ManualActionType, jobID, orderID int, description string) (*ent.ManualAction, error) {
	c := d.client.ManualAction.Create().
		SetActionType(actionType).
		SetJobId(jobID).
		SetContext(map[string]any{"description": description}).
		SetStatus(constants.ManualActionStatus_PENDING)
	if orderID > 0 {
		c = c.SetOrderId(orderID)
	}
	ma, err := c.Save(ctx)
	return ma, err
}

// SetJobTempSlot 设置 job.temp_slot_no
func (d *DBState) SetJobTempSlot(ctx context.Context, jobID, slotNo int) error {
	_, err := d.client.Job.UpdateOneID(jobID).
		SetNillableTempSlotNo(&slotNo).
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set job %d temp slot %d: %w", jobID, slotNo, err)
	}
	return nil
}

// ClearJobTempSlot 清除 job.temp_slot_no
func (d *DBState) ClearJobTempSlot(ctx context.Context, jobID int) error {
	_, err := d.client.Job.UpdateOneID(jobID).
		ClearTempSlotNo().
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("clear job %d temp slot: %w", jobID, err)
	}
	return nil
}

// SetCncStartedAt 记录 CNC 加工开始时间（仅首次写入，已有值则跳过）
func (d *DBState) SetCncStartedAt(ctx context.Context, jobID int) error {
	n, err := d.client.Job.Update().
		Where(job.ID(jobID), job.CncStartedAtIsNil()).
		SetCncStartedAt(time.Now()).
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set cnc started at for job %d: %w", jobID, err)
	}
	if n == 0 {
		slog.Warn("cnc started at already set, skipping", "jobId", jobID)
	}
	return nil
}

// SetCncCompletedAt 记录 CNC 加工完成时间（仅首次写入，且要求 cncStartedAt 已设置）
func (d *DBState) SetCncCompletedAt(ctx context.Context, jobID int) error {
	n, err := d.client.Job.Update().
		Where(job.ID(jobID), job.CncStartedAtNotNil()).
		SetCncCompletedAt(time.Now()).
		AddVersion(1).
		Save(ctx)
	if err != nil {
		return fmt.Errorf("set cnc completed at for job %d: %w", jobID, err)
	}
	if n == 0 {
		slog.Warn("cnc completed at skipped (already set or cncStartedAt missing)", "jobId", jobID)
	}
	return nil
}

// FixJobPosition 恢复工件位置到暂存台：释放 equipment_slot（如果占用）+ 设置位置/步骤/状态
func (d *DBState) FixJobPosition(ctx context.Context, jobID int, tempSlotNo int, stepID string, positionType string) error {
	jb, err := d.client.Job.Get(ctx, jobID)
	if err != nil {
		return fmt.Errorf("fix position: get job %d: %w", jobID, err)
	}

	switch positionType {
	case "ON_EQUIPMENT_DONE":
		equipID, slotNo := parsePositionRef(jb.PositionRefId)
		if equipID > 0 && slotNo > 0 {
			_, _ = d.client.EquipmentSlot.Update().
				Where(equipmentslot.EquipmentIdEQ(equipID), equipmentslot.SlotNoEQ(slotNo)).
				SetStatus(constants.SlotStatus_Done).
				Save(ctx)
		}
		_, err = d.client.Job.UpdateOneID(jobID).
			SetStatus(constants.JobStatus_WaitingUnload).
			SetPositionType(constants.PositionType_OnEquipment).
			SetPositionRefId(jb.PositionRefId).
			SetNillableTempSlotNo(&tempSlotNo).
			SetCurrentStepId(stepID).
			AddVersion(1).
			Save(ctx)
	case "ON_EQUIPMENT_PROCESSING":
		equipID, slotNo := parsePositionRef(jb.PositionRefId)
		if equipID > 0 && slotNo > 0 {
			_, _ = d.client.EquipmentSlot.Update().
				Where(equipmentslot.EquipmentIdEQ(equipID), equipmentslot.SlotNoEQ(slotNo)).
				SetStatus(constants.SlotStatus_Occupied).
				Save(ctx)
		}
		_, err = d.client.Job.UpdateOneID(jobID).
			SetStatus(constants.JobStatus_Processing).
			SetPositionType(constants.PositionType_OnEquipment).
			SetPositionRefId(jb.PositionRefId).
			SetNillableTempSlotNo(&tempSlotNo).
			SetCurrentStepId(stepID).
			AddVersion(1).
			Save(ctx)
	default:
		// ON_BUFFER: release equipment slot first if needed
		if jb.PositionType == constants.PositionType_OnEquipment {
			equipID, slotNo := parsePositionRef(jb.PositionRefId)
			if equipID > 0 && slotNo > 0 {
				// recovery: force release slot regardless of current status
				_, _ = d.client.EquipmentSlot.Update().
					Where(
						equipmentslot.EquipmentIdEQ(equipID),
						equipmentslot.SlotNoEQ(slotNo),
					).
					SetStatus(constants.SlotStatus_Empty).
					ClearCurrentJobId().
					ClearOccupiedAt().
					Save(ctx)
			}
		}
		_, err = d.client.Job.UpdateOneID(jobID).
			SetStatus(constants.JobStatus_OnBuffer).
			SetPositionType(constants.PositionType_OnBuffer).
			SetPositionRefId(fmt.Sprintf("%d", tempSlotNo)).
			SetNillableTempSlotNo(&tempSlotNo).
			SetCurrentStepId(stepID).
			AddVersion(1).
			Save(ctx)
	}
	if err != nil {
		return fmt.Errorf("fix position: update job %d: %w", jobID, err)
	}
	return nil
}

// ScrapRecoveryJob 报废现场找不到的恢复工件：释放 equipment_slot（若占用）+ 终态 Scrapped + 工单 failNum +1。
func (d *DBState) ScrapRecoveryJob(ctx context.Context, jobID int) error {
	jb, err := d.client.Job.Get(ctx, jobID)
	if err != nil {
		return fmt.Errorf("scrap recovery: get job %d: %w", jobID, err)
	}
	if jb.Status == constants.JobStatus_Scrapped || jb.Status == constants.JobStatus_Completed {
		return fmt.Errorf("scrap recovery: job %d already terminal: %s", jobID, jb.Status)
	}
	// 释放设备槽位（若曾在设备上）
	if jb.PositionType == constants.PositionType_OnEquipment {
		if equipID, slotNo := parsePositionRef(jb.PositionRefId); equipID > 0 && slotNo > 0 {
			_, _ = d.client.EquipmentSlot.Update().
				Where(equipmentslot.EquipmentIdEQ(equipID), equipmentslot.SlotNoEQ(slotNo)).
				SetStatus(constants.SlotStatus_Empty).
				ClearCurrentJobId().
				ClearOccupiedAt().
				Save(ctx)
		}
	}
	if err := d.FinishJob(ctx, jobID, jb.WorkOrderId, constants.JobStatus_Scrapped); err != nil {
		return fmt.Errorf("scrap recovery: finish job %d: %w", jobID, err)
	}
	return nil
}

func (d *DBState) IsCNCEquipment(ctx context.Context, equipmentID int) bool {
	equip, err := d.client.Equipment.Query().
		Where(equipment.ID(equipmentID)).
		WithEquipmentType().
		Only(ctx)
	if err != nil || equip == nil {
		return false
	}
	et, err := equip.Edges.EquipmentTypeOrErr()
	if err != nil || et == nil {
		return false
	}
	return et.Code == constants.EquipmentTypeCode_CNC
}

// SetQCResult 写入检测结果到 job 的独立字段（按设备类型区分）。
// INSPECTION -> inspection_result，SAMPLING -> sampling_result；其余设备忽略（防御）。
// 与 context.inspectionPass 双写并存，本字段为合格率统计的一等数据源。
func (d *DBState) SetQCResult(ctx context.Context, jobID int, machineType string, pass bool) error {
	result := constants.QCResult_Pass
	if !pass {
		result = constants.QCResult_Fail
	}
	update := d.client.Job.UpdateOneID(jobID)
	switch constants.EquipmentTypeCode(machineType) {
	case constants.EquipmentTypeCode_Inspection:
		update = update.SetInspectionResult(result)
	case constants.EquipmentTypeCode_Sampling:
		update = update.SetSamplingResult(result)
	default:
		return nil
	}
	if _, err := update.Save(ctx); err != nil {
		return fmt.Errorf("set qc result: job %d: %w", jobID, err)
	}
	return nil
}

// GetFirstStepID 返回配方第一个步骤的 stepId
func (d *DBState) GetFirstStepID(ctx context.Context, recipeID int) (string, error) {
	step, err := d.client.RecipeStep.Query().
		Where(recipestep.RecipeIdEQ(recipeID)).
		Order(recipestep.ByStepIndex()).
		First(ctx)
	if err != nil {
		return "", fmt.Errorf("get first step for recipe %d: %w", recipeID, err)
	}
	return step.StepId, nil
}