package trafficcutoffconfig

import (
	"context"
	"strings"
	"time"

	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/os/gtime"

	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/consts"
	"git.5iot.com/iotlcm-public/iotlcm-worker-svr/internal/model/entity"
)

const (
	noDetailsReason            = "达量断网配置批次没有可处理明细"
	validationFailureReason    = "部分达量断网配置校验失败"
	emptyICCIDReason           = "ICCID不能为空"
	duplicateICCIDReason       = "ICCID在批次内重复"
	unauthorizedReason         = "ICCID不在当前操作员授权范围内"
	cardMissingReason          = "ICCID不存在或不属于当前租户"
	msisdnMismatchReason       = "MSISDN与卡档案不一致"
	imsiMismatchReason         = "IMSI与卡档案不一致"
	flowPoolCardReason         = "流量池卡不支持达量断网配置"
	packageTotalExceededReason = "达量断网阈值不能大于套餐总流量"
)

type executor struct {
	repository *Repository
}

const trafficCutoffConfigProcessingRetryAfter = 2 * time.Minute

func NewExecutor() *executor {
	return &executor{repository: NewRepository()}
}

func (e *executor) CanExecuteProcessing(_ context.Context, main *entity.BatchMain) (bool, error) {
	if main == nil || main.BatchType != consts.BatchTypeTrafficCutoffConfig || main.BatchAsyncStatus != consts.BatchAsyncStatusProcessing {
		return false, nil
	}
	if main.StartTime == nil || main.StartTime.IsZero() {
		return true, nil
	}
	return gtime.Now().Sub(main.StartTime) >= trafficCutoffConfigProcessingRetryAfter, nil
}

func (e *executor) Execute(ctx context.Context, batchNo string) error {
	task, err := e.repository.Load(ctx, strings.TrimSpace(batchNo))
	if err != nil {
		return gerror.Wrap(err, "load traffic cutoff config batch failed")
	}
	validateTask(task)
	return gerror.Wrap(e.repository.Commit(ctx, task), "commit traffic cutoff config batch failed")
}

func validateTask(task *Task) {
	if task == nil || len(task.Details) == 0 {
		if task != nil {
			task.FailureReason = noDetailsReason
		}
		return
	}

	iccidCounts := make(map[string]int, len(task.Details))
	for _, detail := range task.Details {
		if detail == nil {
			continue
		}
		detail.ICCID = strings.TrimSpace(detail.ICCID)
		detail.MSISDN = strings.TrimSpace(detail.MSISDN)
		detail.IMSI = strings.TrimSpace(detail.IMSI)
		if detail.ICCID != "" {
			iccidCounts[detail.ICCID]++
		}
	}

	for _, detail := range task.Details {
		validateDetail(task, detail)
		if detail != nil && detail.Reason == "" && iccidCounts[detail.ICCID] > 1 {
			detail.Reason = duplicateICCIDReason
		}
	}
	_, failCount := countResult(task)
	if failCount > 0 {
		task.FailureReason = validationFailureReason
	} else {
		task.FailureReason = ""
	}
}

func validateDetail(task *Task, detail *Detail) {
	if detail == nil || detail.Reason != "" {
		return
	}
	if detail.ICCID == "" {
		detail.Reason = emptyICCIDReason
		return
	}
	if !detail.Authorized {
		detail.Reason = unauthorizedReason
		return
	}
	if detail.Card == nil {
		detail.Reason = cardMissingReason
		return
	}
	detail.Card.ICCID = strings.TrimSpace(detail.Card.ICCID)
	detail.Card.MSISDN = strings.TrimSpace(detail.Card.MSISDN)
	detail.Card.IMSI = strings.TrimSpace(detail.Card.IMSI)
	if detail.MSISDN != "" && detail.MSISDN != detail.Card.MSISDN {
		detail.Reason = msisdnMismatchReason
		return
	}
	if detail.IMSI != "" && detail.IMSI != detail.Card.IMSI {
		detail.Reason = imsiMismatchReason
		return
	}
	if detail.Card.IsFlowPool != 0 {
		detail.Reason = flowPoolCardReason
		return
	}
	if task.Config.TrafficCutoffStatus == 1 &&
		detail.Card.PackageTotalFlowMb > 0 &&
		task.Config.TrafficCutoffThreshold > detail.Card.PackageTotalFlowMb {
		detail.Reason = packageTotalExceededReason
	}
}

func countResult(task *Task) (successCount, failCount int) {
	if task == nil {
		return 0, 0
	}
	for _, detail := range task.Details {
		if detail != nil && detail.Success() {
			successCount++
		} else {
			failCount++
		}
	}
	return successCount, failCount
}