package one2many

import (
	"git.sxidc.com/go-framework/baize/framework/binding"
	"git.sxidc.com/go-framework/baize/framework/core/api"
	"git.sxidc.com/go-framework/baize/framework/core/api/request"
	"git.sxidc.com/go-framework/baize/framework/core/api/response"
	"git.sxidc.com/go-framework/baize/framework/core/domain"
	"git.sxidc.com/go-framework/baize/framework/core/domain/entity"
	"git.sxidc.com/go-framework/baize/framework/core/infrastructure"
	"git.sxidc.com/go-framework/baize/framework/core/infrastructure/database"
	"git.sxidc.com/go-framework/baize/framework/core/infrastructure/database/sql"
	"git.sxidc.com/go-framework/baize/framework/core/tag/sql/sql_mapping"
	"git.sxidc.com/go-tools/utils/reflectutils"
	"git.sxidc.com/go-tools/utils/slice"
	"git.sxidc.com/go-tools/utils/strutils"
	"github.com/pkg/errors"
	"reflect"
)

func UpdateLeft(leftTableName string, leftDomainCNName string, leftRelationFieldName string, leftRelationColumnName string,
	rightTableName string, rightDomainCNName string) binding.ServiceFunc[any] {
	return func(c *api.Context, params request.Params, objects []domain.Object, i *infrastructure.Infrastructure) (any, error) {
		object := objects[0]
		if object == nil {
			return nil, errors.New("领域实体为空")
		}

		dbExecutor := i.DBExecutor()

		leftEntity, ok := object.(entity.Entity)
		if !ok {
			return nil, errors.New("领域对象不是实体")
		}

		// 字段校验
		err := entity.CheckFieldID(leftEntity)
		if err != nil {
			return nil, err
		}

		// left存在性校验
		leftExist, err := database.CheckExist(dbExecutor, &sql.CheckExistExecuteParams{
			TableName:  leftTableName,
			Conditions: sql.NewConditions().Equal(entity.ColumnID, leftEntity.GetID()),
		})
		if err != nil {
			return nil, err
		}

		if !leftExist {
			return nil, errors.New(leftEntity.DomainCNName() + "不存在")
		}

		if !domain.HasField(object, leftRelationFieldName) {
			return nil, errors.New("关联字段" + leftRelationFieldName + "不存在")
		}

		rightIDs, err := domain.Field[[]string](object, leftRelationFieldName)
		if err != nil {
			return nil, err
		}

		if rightIDs != nil && len(rightIDs) != 0 {
			for _, rightID := range rightIDs {
				err := entity.CheckIDTypeValue(leftDomainCNName, leftRelationFieldName, rightID)
				if err != nil {
					return nil, err
				}
			}

			rightIDs = slice.RemoveRepeatElement(rightIDs)
		}

		err = database.Transaction(dbExecutor, func(tx database.Executor) error {
			err := database.Update(tx, &sql.UpdateExecuteParams{
				TableName:  rightTableName,
				TableRow:   sql.NewTableRow().Add(leftRelationColumnName, ""),
				Conditions: sql.NewConditions().Equal(leftRelationColumnName, leftEntity.GetID()),
			})
			if err != nil {
				return err
			}

			if rightIDs == nil || len(rightIDs) == 0 {
				return nil
			}

			rightCount, err := database.Count(dbExecutor, &sql.CountExecuteParams{
				TableName:  rightTableName,
				Conditions: sql.NewConditions().In(entity.ColumnID, rightIDs),
			})
			if err != nil {
				return err
			}

			if int(rightCount) != len(rightIDs) {
				return errors.New("部分" + rightDomainCNName + "不存在")
			}

			err = database.Update(tx, &sql.UpdateExecuteParams{
				TableName:  rightTableName,
				TableRow:   sql.NewTableRow().Add(leftRelationColumnName, leftEntity.GetID()),
				Conditions: sql.NewConditions().In(entity.ColumnID, rightIDs),
			})
			if err != nil {
				return err
			}

			return nil
		})
		if err != nil {
			return nil, err
		}

		return nil, nil
	}
}

func QueryLeft[RI any](leftTableName string, leftRelationColumnName string,
	rightTableName string) binding.ServiceFunc[response.InfosData[RI]] {
	return func(c *api.Context, params request.Params, objects []domain.Object, i *infrastructure.Infrastructure) (response.InfosData[RI], error) {
		errResponse := response.InfosData[RI]{
			Infos: make([]RI, 0),
		}

		if params == nil {
			return errResponse, errors.New("请求参数为空")
		}

		object := objects[0]
		if object == nil {
			return errResponse, errors.New("领域实体为空")
		}

		dbExecutor := i.DBExecutor()

		queryParams, ok := params.(request.QueryWithIDRequestParams)
		if !ok {
			return errResponse, errors.New("请求参数不是Query接口")
		}

		leftEntity, ok := object.(entity.Entity)
		if !ok {
			return errResponse, errors.New("领域对象不是实体")
		}

		// left存在性校验
		leftExist, err := database.CheckExist(dbExecutor, &sql.CheckExistExecuteParams{
			TableName:  leftTableName,
			Conditions: sql.NewConditions().Equal(entity.ColumnID, leftEntity.GetID()),
		})
		if err != nil {
			return errResponse, err
		}

		if !leftExist {
			return errResponse, errors.New(leftEntity.DomainCNName() + "不存在")
		}

		rightResults, totalCount, err := database.Query(dbExecutor, &sql.QueryExecuteParams{
			TableName:  rightTableName,
			Conditions: sql.NewConditions().Equal(leftRelationColumnName, leftEntity.GetID()),
		})
		if err != nil && !database.IsErrorDBRecordNotExist(err) {
			return errResponse, err
		}

		infos := make([]RI, 0)
		err = sql.ParseSqlResult(rightResults, &infos)
		if err != nil {
			return errResponse, err
		}

		return response.InfosData[RI]{
			Infos:      infos,
			TotalCount: totalCount,
			PageNo:     queryParams.GetPageNo(),
		}, nil
	}
}

func UpdateRight(rightTableName string, rightRelationFieldName string,
	leftTableName string, leftDomainCNName string, leftRelationColumnName string) binding.ServiceFunc[any] {
	return func(c *api.Context, params request.Params, objects []domain.Object, i *infrastructure.Infrastructure) (any, error) {
		object := objects[0]
		if object == nil {
			return nil, errors.New("领域实体为空")
		}

		dbExecutor := i.DBExecutor()

		rightEntity, ok := object.(entity.Entity)
		if !ok {
			return nil, errors.New("领域对象不是实体")
		}

		// 字段校验
		err := entity.CheckFieldID(rightEntity)
		if err != nil {
			return nil, err
		}

		// right存在性校验
		rightExist, err := database.CheckExist(dbExecutor, &sql.CheckExistExecuteParams{
			TableName:  rightTableName,
			Conditions: sql.NewConditions().Equal(entity.ColumnID, rightEntity.GetID()),
		})
		if err != nil {
			return nil, err
		}

		if !rightExist {
			return nil, errors.New(rightEntity.DomainCNName() + "不存在")
		}

		if !domain.HasField(object, rightRelationFieldName) {
			return nil, errors.New("关联字段" + rightRelationFieldName + "不存在")
		}

		leftID, err := domain.Field[string](object, rightRelationFieldName)
		if err != nil {
			return nil, err
		}

		if strutils.IsStringNotEmpty(leftID) {
			leftExist, err := database.CheckExist(dbExecutor, &sql.CheckExistExecuteParams{
				TableName:  leftTableName,
				Conditions: sql.NewConditions().Equal(entity.ColumnID, leftID),
			})
			if err != nil {
				return nil, err
			}

			if !leftExist {
				return nil, errors.New(leftDomainCNName + "不存在")
			}
		}

		err = database.Update(dbExecutor, &sql.UpdateExecuteParams{
			TableName:  rightTableName,
			TableRow:   sql.NewTableRow().Add(leftRelationColumnName, leftID),
			Conditions: sql.NewConditions().Equal(entity.ColumnID, rightEntity.GetID()),
		})
		if err != nil {
			return nil, err
		}

		return nil, nil
	}
}

func QueryRight[LI any](rightTableName string, rightRelationFieldName string, leftTableName string) binding.ServiceFunc[LI] {
	return func(c *api.Context, params request.Params, objects []domain.Object, i *infrastructure.Infrastructure) (LI, error) {
		outputZero := reflectutils.Zero[LI]()

		dbExecutor := i.DBExecutor()

		object := objects[0]
		if object == nil {
			return outputZero, errors.New("领域实体为空")
		}

		rightEntity, ok := object.(entity.Entity)
		if !ok {
			return outputZero, errors.New("领域对象不是实体")
		}

		// right存在性校验
		existRightResult, err := database.QueryOne(dbExecutor, &sql.QueryOneExecuteParams{
			TableName:  rightTableName,
			Conditions: sql.NewConditions().Equal(entity.ColumnID, rightEntity.GetID()),
		})
		if err != nil {
			if database.IsErrorDBRecordNotExist(err) {
				return outputZero, errors.New(rightEntity.DomainCNName() + "不存在")
			}

			return outputZero, err
		}

		existRightEntity := reflect.New(reflect.TypeOf(object).Elem()).Interface().(domain.Object)
		err = sql.ParseSqlResult(existRightResult, existRightEntity)
		if err != nil {
			return outputZero, err
		}

		if !domain.HasField(existRightEntity, rightRelationFieldName) {
			return outputZero, errors.New("关联字段" + rightRelationFieldName + "不存在")
		}

		leftID, err := domain.Field[string](existRightEntity, rightRelationFieldName)
		if err != nil {
			return outputZero, err
		}

		leftResult, err := database.QueryOne(dbExecutor, &sql.QueryOneExecuteParams{
			TableName:  leftTableName,
			Conditions: sql.NewConditions().Equal(entity.ColumnID, leftID),
		})
		if err != nil && !database.IsErrorDBRecordNotExist(err) {
			return outputZero, err
		}

		leftInfo := reflectutils.Zero[LI]()
		err = sql.ParseSqlResult(leftResult, &leftInfo)
		if err != nil {
			return outputZero, err
		}

		return leftInfo, nil
	}
}

type ConditionFieldCallback func(conditions *sql.Conditions, fieldName string, columnName string, value any) (hasDeal bool, err error)

func QueryRightWithLeftInfo[RI any, LI any](rightTableName string, rightFieldCallback ConditionFieldCallback, leftTableName string, leftRelationColumnName string) binding.ServiceFunc[response.InfosData[map[string]any]] {
	return func(c *api.Context, params request.Params, objects []domain.Object, i *infrastructure.Infrastructure) (response.InfosData[map[string]any], error) {
		errResponse := response.InfosData[map[string]any]{
			Infos: make([]map[string]any, 0),
		}

		if params == nil {
			return errResponse, errors.New("请求参数为空")
		}

		object := objects[0]
		if object == nil {
			return errResponse, errors.New("领域实体为空")
		}

		dbExecutor := i.DBExecutor()

		queryParams, ok := params.(request.QueryRequestParams)
		if !ok {
			return errResponse, errors.New("请求参数不是Query接口")
		}

		rightEntity, ok := object.(entity.Entity)
		if !ok {
			return errResponse, errors.New("领域对象不是实体")
		}

		conditions := sql.NewConditions()

		rightFields, err := sql_mapping.DefaultUsage(rightEntity)
		if err != nil {
			return errResponse, err
		}

		for _, rightField := range rightFields {
			hasDeal := false
			if rightFieldCallback != nil {
				hasDeal, err = rightFieldCallback(conditions, rightField.FieldName, rightField.ColumnName, rightField.Value)
				if err != nil {
					return errResponse, err
				}
			}

			if !hasDeal {
				fieldValue := reflect.ValueOf(rightField.Value)
				if !fieldValue.IsZero() {
					conditions.Equal(rightField.ColumnName, rightField.Value)
				}
			}
		}

		rightResults, totalCount, err := database.Query(dbExecutor, &sql.QueryExecuteParams{
			TableName:  rightTableName,
			Conditions: conditions,
			PageNo:     queryParams.GetPageNo(),
			PageSize:   queryParams.GetPageSize(),
		})
		if err != nil {
			return errResponse, nil
		}

		if rightResults == nil || len(rightResults) == 0 {
			return response.InfosData[map[string]any]{
				Infos:      make([]map[string]any, 0),
				TotalCount: 0,
				PageNo:     0,
			}, nil
		}

		leftIDs := make([]string, 0)
		for _, rightResult := range rightResults {
			leftID := rightResult.ColumnValueString(leftRelationColumnName)
			if strutils.IsStringNotEmpty(leftID) {
				leftIDs = append(leftIDs, leftID)
			}
		}

		leftResultMap := make(map[string]sql.Result)
		if leftIDs != nil && len(leftIDs) != 0 {
			leftResults, _, err := database.Query(dbExecutor, &sql.QueryExecuteParams{
				TableName:  leftTableName,
				Conditions: sql.NewConditions().In(entity.ColumnID, leftIDs),
			})
			if err != nil {
				return errResponse, err
			}

			for _, leftResult := range leftResults {
				leftID := leftResult.ColumnValueString(entity.ColumnID)
				leftResultMap[leftID] = leftResult
			}
		}

		infos := make([]map[string]any, len(rightResults))
		for index, rightResult := range rightResults {
			rightInfo := reflectutils.Zero[RI]()
			leftInfo := reflectutils.Zero[LI]()

			err = sql.ParseSqlResult(rightResult, &rightInfo)
			if err != nil {
				return errResponse, err
			}

			leftID := rightResult.ColumnValueString(leftRelationColumnName)
			if strutils.IsStringEmpty(leftID) {
				infos[index] = map[string]any{
					"self": rightInfo,
					"with": leftInfo,
				}
				continue
			}

			leftResult, ok := leftResultMap[leftID]
			if !ok {
				infos[index] = map[string]any{
					"self": rightInfo,
					"with": leftInfo,
				}
				continue
			}

			err = sql.ParseSqlResult(leftResult, &leftInfo)
			if err != nil {
				return errResponse, err
			}

			infos[index] = map[string]any{
				"self": rightInfo,
				"with": leftInfo,
			}
		}

		return response.InfosData[map[string]any]{
			Infos:      infos,
			TotalCount: totalCount,
			PageNo:     queryParams.GetPageNo(),
		}, nil
	}
}