package eventloop

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

	"bj_power_mes/constants"
	"bj_power_mes/ent"
	"bj_power_mes/ent/equipmentslot"
	"bj_power_mes/ent/job"
	"bj_power_mes/ent/pallet"
	"bj_power_mes/ent/workorder"
)

// RecoverOnStartup 启动时执行保守人工确认恢复。
// 先暂停所有工单再校验一致性——避免启动时未经验证的状态被调度器消费。
// 1. 将所有 IN_PROGRESS 的 work_order 改为 PAUSED
// 2. 校验 temp_slot_no 一致性（重复/越界）
// 3. 校验 equipment_slot 与 job 位置一致性
// 4. 不一致项创建 manual_action 等待人工确认
func (d *DBState) RecoverOnStartup(ctx context.Context) (recoveredJobs int, pendingRecoveryOrderIDs []int, manualActions []*ent.ManualAction, err error) {
	// 逐个检查 IN_PROGRESS/PAUSING 订单：有 ON_EQUIPMENT 活跃工件的保持原状等待人工确认
	activeOrders, _ := d.client.WorkOrder.Query().
		Where(workorder.StatusIn(constants.WorkOrderStatus_InProgress, constants.WorkOrderStatus_Pausing)).
		All(ctx)
	var pendingOrderIDs []int
	for _, o := range activeOrders {
		onEquipCount, _ := d.client.Job.Query().
			Where(
				job.WorkOrderIdEQ(o.ID),
				job.StatusNotIn(constants.JobStatus_Completed, constants.JobStatus_Scrapped),
				job.PositionTypeEQ(constants.PositionType_OnEquipment),
			).
			Count(ctx)
		if onEquipCount > 0 {
			// 在设备中的工件需要人工确认，保持 IN_PROGRESS
			pendingOrderIDs = append(pendingOrderIDs, o.ID)
			slog.Info("recovery: order kept IN_PROGRESS for position confirmation", "orderId", o.ID)
		} else {
			// 没有设备中工件，安全切换为 PAUSED
			_, _ = d.client.WorkOrder.UpdateOneID(o.ID).
				SetStatus(constants.WorkOrderStatus_Paused).
				Save(ctx)
		}
	}

	jobs, err := d.GetActiveJobs(ctx)
	if err != nil {
		return 0, nil, nil, err
	}

	// 构建 jobID→orderID 映射，用于 ManualAction 关联工单
	jobOrder := make(map[int]int, len(jobs))
	for _, j := range jobs {
		jobOrder[j.ID] = j.WorkOrderId
	}

	createMA := func(jobID int, desc string) {
		ma, _ := d.CreateManualAction(ctx, constants.ManualActionType_RecoveryRequired, jobID, jobOrder[jobID], desc)
		if ma != nil {
			manualActions = append(manualActions, ma)
		}
	}

	capacity := d.TempSlotCapacity(ctx)
	slotUsers := make(map[int][]int)
	for _, j := range jobs {
		if j.TempSlotNo != nil {
			slot := *j.TempSlotNo
			if slot < 1 || slot > capacity {
				createMA(j.ID, fmt.Sprintf("temp_slot_no %d out of range [1,%d]", slot, capacity))
				continue
			}
			slotUsers[slot] = append(slotUsers[slot], j.ID)
		}
	}

	for slot, users := range slotUsers {
		if len(users) > 1 {
			slog.Warn("recovery: duplicate temp slot", "slot", slot, "jobs", users)
			for _, jID := range users {
				createMA(jID, fmt.Sprintf("duplicate temp_slot_no %d", slot))
			}
		}
	}

	for _, j := range jobs {
		if j.PositionType == constants.PositionType_OnEquipment {
			equipID, slotNo := parsePositionRef(j.PositionRefId)
			if equipID == 0 {
				continue
			}
			slot, slotErr := d.client.EquipmentSlot.Query().
				Where(equipmentslot.EquipmentIdEQ(equipID), equipmentslot.SlotNoEQ(slotNo)).
				First(ctx)
			if slotErr != nil {
				slog.Warn("recovery: slot not found", "equip", equipID, "slot", slotNo)
				createMA(j.ID, fmt.Sprintf("equipment slot %d:%d not found", equipID, slotNo))
				continue
			}
			cjid := 0
			if slot.CurrentJobId != nil {
				cjid = *slot.CurrentJobId
			}
			if cjid != j.ID {
				createMA(j.ID, fmt.Sprintf("equipment_slot %d:%d has job %d, expected %d", equipID, slotNo, cjid, j.ID))
			}
		}
	}

	// Pallet 状态推导
	pallets, pErr := d.client.Pallet.Query().
		Where(pallet.StatusIn(constants.PalletStatus_PendingProcess, constants.PalletStatus_Processing)).
		All(ctx)
	if pErr != nil {
		slog.Warn("recovery: query pallets failed", "error", pErr)
	} else {
		for _, p := range pallets {
			palletPred := job.HasPalletWith(pallet.IDEQ(p.ID))
			activeCount, cErr := d.client.Job.Query().
				Where(
					palletPred,
					job.StatusNotIn(constants.JobStatus_Completed, constants.JobStatus_Scrapped),
				).
				Count(ctx)
			if cErr != nil {
				continue
			}
			if activeCount == 0 {
				// 全部终态 → COMPLETED
				totalJobs, _ := d.client.Job.Query().Where(job.HasPalletWith(pallet.IDEQ(p.ID))).Count(ctx)
				scrappedCount, _ := d.client.Job.Query().
					Where(job.HasPalletWith(pallet.IDEQ(p.ID)), job.StatusEQ(constants.JobStatus_Scrapped)).
					Count(ctx)
				now := time.Now()
				_, err := d.client.Pallet.UpdateOneID(p.ID).
					SetStatus(constants.PalletStatus_Completed).
					SetPassQty(totalJobs - scrappedCount).
					SetNgQty(scrappedCount).
					SetCompletedAt(now).
					Save(ctx)
				if err != nil {
					slog.Warn("recovery: complete pallet failed", "palletId", p.ID, "error", err)
				} else {
					slog.Info("recovery: pallet completed", "palletId", p.ID)
				}
			}
			// 存在非终态 Job → 保持不变，跟随 Job 恢复流程
		}
	}
	return len(jobs), pendingOrderIDs, manualActions, nil
}