package textaudit

import (
	"service/api/consts"
	textauditproto "service/api/proto/textaudit/proto"
	textaudittaskproto "service/api/proto/textaudittask/proto"
	"service/bizcommon/util"
	"service/dbstruct"
	"service/library/logger"

	textaudit "github.com/alibabacloud-go/imageaudit-20191230/v3/client"
	teautils "github.com/alibabacloud-go/tea-utils/v2/service"
	"github.com/alibabacloud-go/tea/tea"
	goproto "google.golang.org/protobuf/proto"

	"github.com/gin-gonic/gin"
)

// 刷新批次号
func RefreshBatchId() (string, error) {
	batchId, err := _DefaultContentAuditRTI.GetAndUpdateTextAuditBatchId(&gin.Context{}, genereteBatchId())
	if err != nil {
		logger.Info("_DefaultContentAuditRTI GetAndUpdateTextAuditBatchId fail: %v", err)
		return "", err
	}
	return batchId, nil
}

func Run(batchId string) (successNum int, failNum int, err error) {

	// 查询该批次所有审核任务
	textaudittasks, err := _DefaultTextAuditTask.OpList(&gin.Context{}, &textaudittaskproto.OpListReq{
		BatchId: goproto.String(batchId),
		Status:  goproto.Int64(consts.TextAudit_Created),
		Sort:    "ct",
	})
	if err != nil {
		logger.Info("_DefaultTextAuditTask OpList fail: %v", err)
	}

	if len(textaudittasks) == 0 {
		return 0, 0, nil
	}

	logger.Info("Text audit batch started, batchId : %v, task number : %v", batchId, len(textaudittasks))
	// 1.构建批量任务控制块，初始化必要的actionMap、填充送审text等信息
	ctrlBlock := NewTextAuditTaskBatchControlBlock(textaudittasks, batchId)

	// 2.创建请求
	reqs, err := createScanTextRequest(ctrlBlock)
	if err != nil {
		logger.Info("Create Scan TextRequest fail: %v", err)
		handleBatchError(ctrlBlock, err)
		return
	}

	// 3.调用阿里的服务,收到应答
	runtime := &teautils.RuntimeOptions{
		ConnectTimeout: tea.Int(30000),
	}

	results := make([]*textaudit.ScanTextResponseBodyDataElements, 0)
	for _, req := range reqs {
		var _result *textaudit.ScanTextResponse
		_result, err = defaultTextAuditClient.ScanTextWithOptions(req, runtime)
		if err != nil {
			logger.Error("ScanTextWithOptions fail : %v", err)
			handleBatchError(ctrlBlock, err)
			return
		}
		results = append(results, _result.Body.Data.Elements...)
		logger.Info("Receive the response from ScanTextWithOptions: %v", _result.String())
	}

	// 4.处理应答
	err = handleScanTextResponseBodyDataElements(ctrlBlock, results)

	successNum = len(textaudittasks)
	return
}

func createScanTextRequest(ctrlBlock *TextAuditTaskBatchControlBlock) (requests []*textaudit.ScanTextRequest, err error) {
	reqTasks := make([]*textaudit.ScanTextRequestTasks, 0)
	for _, taskCtrlBlock := range ctrlBlock.TaskCtrlBlocks {
		reqTasks = append(reqTasks, &textaudit.ScanTextRequestTasks{
			Content: taskCtrlBlock.TextAuditTask.AuditedText,
		})
	}

	scanLabels := make([]*textaudit.ScanTextRequestLabels, len(labels))
	for i := range scanLabels {
		scanLabels[i] = &textaudit.ScanTextRequestLabels{
			Label: goproto.String(labels[i]),
		}
	}

	// 阿里云一次最多审10条，将待审图片按10条拆分
	requests = make([]*textaudit.ScanTextRequest, 0)
	i := 0
	for ; i < len(reqTasks)/10; i++ {
		request := &textaudit.ScanTextRequest{
			Labels: scanLabels,
			Tasks:  reqTasks[i*10 : (i+1)*10],
		}
		requests = append(requests, request)
	}
	if i*10 < len(reqTasks) {
		request := &textaudit.ScanTextRequest{
			Labels: scanLabels,
			Tasks:  reqTasks[i*10:],
		}
		requests = append(requests, request)
	}

	logger.Info("本次打包:%v", reqTasks)
	return
}

func handleScanTextResponseBodyDataElements(ctrlBlock *TextAuditTaskBatchControlBlock, results []*textaudit.ScanTextResponseBodyDataElements) (err error) {
	taskCtrlBlocks := ctrlBlock.TaskCtrlBlocks
	actionMap := ctrlBlock.ActionMap
	for i, result := range results {
		isActionCompleted := false
		action := &TextAuditAction{}

		// 1.立即在textaudit-textaudit中更新该次审核结果
		logger.Info("text_audit_id:%v", taskCtrlBlocks[i].TextAuditTask.TextAuditId)
		pass, textaudit, err := handleTextAudit(taskCtrlBlocks[i].TextAuditTask.TextAuditId, result)
		if err != nil {
			logger.Error("handleTextAudit fail: %v", err)
		}

		// 2.更新任务状态
		taskCtrlBlocks[i].IsTaskPassed = pass
		taskCtrlBlocks[i].TextAuditTask.TextAudit = textaudit

		// 3.通过task的actionId，去actionId-[]*task的map查出本批次对该字段的动作链，更新其中关于自己的状态
		isActionCompleted, action = handleTaskAction(taskCtrlBlocks[i], actionMap)

		// 4.等待所有动作链元素均已抵达，判定本批次对该字段的操作是否成功
		if isActionCompleted {
			logger.Info("entering finalizeTask...")
			if err = finalizeTask(action); err != nil {
				logger.Error("finalizeTask fail: %v", err)
			}
		}
	}
	return
}

func handleTextAudit(id *string, result *textaudit.ScanTextResponseBodyDataElements) (pass bool, textaudit *dbstruct.TextAudit, err error) {
	ctx := &gin.Context{}
	textaudit = &dbstruct.TextAudit{
		Id: id,
	}
	logger.Info("entering copyScanResultInfo...")
	pass, err = copyScanResultInfo(textaudit, result)
	if err != nil {
		logger.Error("Copy Scan Result Info fail: %v\n", err)
		return
	}
	logger.Info("entering _DefaultTextAudit.OpUpdate...")
	if err = _DefaultTextAudit.OpUpdate(ctx, &textauditproto.OpUpdateReq{
		TextAudit: textaudit,
	}); err != nil {
		logger.Error("_DefaultTextAudit OpUpdate fail: %v\n", err)
		return
	}
	return
}

// 通过task的actionId查出action, 通知该task已完成
func handleTaskAction(task *TextAuditTaskControlBlock, actionMap map[string]*TextAuditAction) (isActionCompleted bool, action *TextAuditAction) {
	logger.Info("entering handleTaskAction...")
	action = actionMap[task.ActionId]
	action.AuditedTaskNum++

	isActionCompleted = action.TaskNum == action.AuditedTaskNum
	return

}

// 等待所有动作链元素均已抵达，判定本批次对该字段的操作是否成功
func finalizeTask(action *TextAuditAction) (err error) {
	lastValidTask, lastValidTaskIndex := action.TaskChain[0], 0 // 仅在动作链终态不成功时有意义，表示最后一个可以用以回退的失败任务及其索引
	passTaskIds := make([]string, 0)                            // 所有已审核成功的任务的taskId
	expiredTaskIds := make([]string, 0)                         // 所有已失效任务的taskId，失效任务是指那些前驱任务依然失败的失败任务，这些任务已失去实际意义，不可以用来回退
	statuses := make([]int64, len(action.TaskChain))            // 所有任务的终态状态，成功，回退，或失效
	isActionInPassedStatus := true                              // 当前动作链是否处于成功中
	for i, task := range action.TaskChain {
		if !task.IsTaskPassed { // 动作链检测到失败任务
			if isActionInPassedStatus { // 若动作链处于成功状态，则这是目前为止，最后一个可以用于回退的任务
				lastValidTask, lastValidTaskIndex = task, i
				statuses[i] = consts.TextAudit_Rollbacked
				isActionInPassedStatus = false
			} else { // 否则，若动作链处于失败状态，则该任务已失效
				statuses[i] = consts.TextAudit_Expired
				expiredTaskIds = append(expiredTaskIds, util.DerefString(task.TextAuditTask.Id))
			}
		} else { // 若动作链检测到成功任务，则重置动作链任务态，并将最后有效任务标志为失效（它已不再用于回退）
			passTaskIds = append(passTaskIds, util.DerefString(task.TextAuditTask.Id))
			statuses[i] = consts.TextAudit_Passed
			isActionInPassedStatus = true
			if statuses[lastValidTaskIndex] == consts.TextAudit_Rollbacked {
				statuses[lastValidTaskIndex] = consts.TextAudit_Expired
				expiredTaskIds = append(expiredTaskIds, util.DerefString(action.TaskChain[lastValidTaskIndex].TextAuditTask.Id))
			}
		}
	}

	logger.Info("reday for handler execution...")
	// 判定任务链终态，终态非成功，执行回退操作，记录到数据库中
	if !action.IsPassed() {
		if err = executeRollBack(lastValidTask.TextAuditTask); err != nil {
			return
		}
	}

	// 更新所有任务状态
	if err = updatePassedTasks(passTaskIds); err != nil {
		return
	}
	if err = updateExpiredTasks(expiredTaskIds); err != nil {
		return
	}

	// 终态成功，执行成功后操作
	logger.Info("reday for success...")
	if action.IsPassed() {
		if err = handleSuccess(action.TaskChain[len(action.TaskChain)-1].TextAuditTask); err != nil {
			return
		}
	}

	logger.Info("action statuses : %v", statuses)

	return
}

// 将文字审核结果copy到文字审核实体中
func copyScanResultInfo(textaudit *dbstruct.TextAudit, elements *textaudit.ScanTextResponseBodyDataElements) (pass bool, err error) {

	pass = true
	if len(elements.Results) == 0 {
		pass = false
		textaudit.Status = goproto.Int64(consts.TextAudit_ServiceFailed)
		textaudit.NotPassScenes = append(textaudit.NotPassScenes, "机审失败")
		return
	}
	for _, result := range elements.Results {
		textaudit.Suggestion = result.Suggestion
		textaudit.Label = result.Label
		textaudit.Rate = goproto.Float64(float64(util.DerefFloat32(result.Rate)))
		if util.DerefString(textaudit.Label) == LabelPassed {
			textaudit.Status = goproto.Int64(consts.TextAudit_Passed)
		} else {
			pass = false
			textaudit.Status = goproto.Int64(consts.TextAudit_Rejected)
			for _, detail := range result.Details {
				label := TextAuditLabel(util.DerefString(detail.Label))
				contexts := parseDetailsContexts(detail.Contexts)
				switch label {
				case Spam:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "垃圾内容")
					textaudit.SpamLabelDetails = &contexts
				case Politics:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "敏感内容")
					textaudit.PoliticsLabelDetails = &contexts
				case Abuse:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "辱骂内容")
					textaudit.AbuseLabelDetails = &contexts
				case Terrorism:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "暴恐内容")
					textaudit.TerrorismLabelDetails = &contexts
				case Porn:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "色情内容")
					textaudit.PornLabelDetails = &contexts
				case Flood:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "灌水内容")
					textaudit.FloodLabelDetails = &contexts
				case Contraband:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "违禁内容")
					textaudit.ContrabandLabelDetails = &contexts
				case Ad:
					textaudit.NotPassScenes = append(textaudit.NotPassScenes, "广告内容")
					textaudit.AdLabelDetails = &contexts
				}
			}
		}
	}
	return
}

func parseDetailsContexts(contexts []*textaudit.ScanTextResponseBodyDataElementsResultsDetailsContexts) []string {
	ctxs := make([]string, len(contexts))
	for i, context := range contexts {
		ctxs[i] = util.DerefString(context.Context)
	}
	return ctxs
}

func executeRollBack(lastValidTask *dbstruct.TextAuditTask) (err error) {
	ctx := &gin.Context{}
	lastValidTask.Status = goproto.Int64(consts.TextAudit_Rollbacked)
	if err = _DefaultResultHandler.Handle(ctx, lastValidTask, consts.TextAuditTaskUpdate_Rollback); err != nil {
		logger.Error("Roll back taskId:%v fail:%v", util.DerefString(lastValidTask.Id), err)
		if err = _DefaultTextAuditTask.OpUpdate(ctx, &textaudittaskproto.OpUpdateReq{
			TextAuditTask: &dbstruct.TextAuditTask{
				Id:      lastValidTask.Id,
				Status:  goproto.Int64(consts.TextAudit_Failed),
				Remarks: goproto.String("任务审核失败，回退失败，请联系管理员排查"),
			},
		}); err != nil {
			logger.Error("_DefaultTextAuditTask OpUpdate fail: %v\n", err)
		}
		return
	}
	if err = _DefaultTextAuditTask.OpUpdate(ctx, &textaudittaskproto.OpUpdateReq{
		TextAuditTask: &dbstruct.TextAuditTask{
			Id:      lastValidTask.Id,
			Status:  goproto.Int64(consts.TextAudit_Rollbacked),
			Remarks: goproto.String("任务审核失败，已将字段回退至之前的版本"),
		},
	}); err != nil {
		logger.Error("_DefaultTextAuditTask OpUpdate fail: %v\n", err)
	}
	return
}

func handleSuccess(task *dbstruct.TextAuditTask) (err error) {
	ctx := &gin.Context{}
	task.Status = goproto.Int64(consts.TextAudit_Passed)
	if err = _DefaultResultHandler.Handle(ctx, task, consts.TextAuditTaskUpdate_Success); err != nil {
		logger.Error("Handle success taskId:%v fail:%v", util.DerefString(task.Id), err)
		if err = _DefaultTextAuditTask.OpUpdate(ctx, &textaudittaskproto.OpUpdateReq{
			TextAuditTask: &dbstruct.TextAuditTask{
				Id:      task.Id,
				Status:  goproto.Int64(consts.TextAudit_Failed),
				Remarks: goproto.String("任务审核成功，执行成功后操作失败，请联系管理员排查"),
			},
		}); err != nil {
			logger.Error("_DefaultTextAuditTask OpUpdate fail: %v\n", err)
		}
		return
	}
	return
}

func updatePassedTasks(passTaskIds []string) (err error) {
	ctx := &gin.Context{}
	if err = _DefaultTextAuditTask.OpUpdateByIds(ctx, &textaudittaskproto.OpUpdateByIdsReq{
		TextAuditTask: &dbstruct.TextAuditTask{
			Status: goproto.Int64(consts.TextAudit_Passed),
		},
		Ids: passTaskIds,
	}); err != nil {
		logger.Error("_DefaultTextAuditTask OpUpdateByIds fail: %v\n", err)
		return
	}
	return
}

func updateExpiredTasks(expiredTaskIds []string) (err error) {
	ctx := &gin.Context{}
	if err = _DefaultTextAuditTask.OpUpdateByIds(ctx, &textaudittaskproto.OpUpdateByIdsReq{
		TextAuditTask: &dbstruct.TextAuditTask{
			Status: goproto.Int64(consts.TextAudit_Expired),
		},
		Ids: expiredTaskIds,
	}); err != nil {
		logger.Error("_DefaultTextAuditTask OpUpdateByIds fail: %v\n", err)
		return
	}

	return
}

func handleBatchError(ctrlBlock *TextAuditTaskBatchControlBlock, _err error) (err error) {
	logger.Info("All tasks of this batchId: %v has failed, rolling back...", ctrlBlock.BatchId)
	ctx := &gin.Context{}
	if err = _DefaultTextAudit.OpUpdateByBatchId(ctx, ctrlBlock.BatchId, &dbstruct.TextAudit{
		Status:  goproto.Int64(consts.TextAudit_ServiceFailed),
		Remarks: goproto.String("批次任务失败，原因详见task表"),
	}); err != nil {
		logger.Error("_DefaultTextAudit OpUpdateByBatchId fail: %v\n", err)
		return
	}

	if err = _DefaultTextAuditTask.OpUpdateByBatchId(ctx, ctrlBlock.BatchId, &dbstruct.TextAuditTask{
		Status:  goproto.Int64(consts.TextAudit_ServiceFailed),
		Remarks: goproto.String(_err.Error()),
	}); err != nil {
		logger.Error("_DefaultTextAuditTask OpUpdateByBatchId fail: %v\n", err)
		return
	}

	// 回退
	for _, taskCtrlBlock := range ctrlBlock.TaskCtrlBlocks {
		task := taskCtrlBlock.TextAuditTask
		task.Status = goproto.Int64(consts.TextAudit_ServiceFailed)
		if err = _DefaultResultHandler.Handle(ctx, task, consts.TextAuditTaskUpdate_Rollback); err != nil {
			if err = _DefaultTextAuditTask.OpUpdate(ctx, &textaudittaskproto.OpUpdateReq{
				TextAuditTask: &dbstruct.TextAuditTask{
					Id:      task.Id,
					Status:  goproto.Int64(consts.TextAudit_Failed),
					Remarks: goproto.String("任务审核失败，回退失败，请联系管理员排查"),
				},
			}); err != nil {
				logger.Error("_DefaultTextAudit OpUpdate fail: %v\n", err)
			}
		}
	}

	return
}