package database

import (
	"context"
	"errors"

	"git.anthrove.art/Anthrove/otter-space-sdk/v2/internal/utils"
	otterError "git.anthrove.art/Anthrove/otter-space-sdk/v2/pkg/error"
	"git.anthrove.art/Anthrove/otter-space-sdk/v2/pkg/models"
	log "github.com/sirupsen/logrus"
	"go.opentelemetry.io/otel/attribute"
	"gorm.io/gorm"
)

func CreateUserFavorite(ctx context.Context, userFav models.UserFavorite) (models.UserFavorite, error) {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "CreateUserFavorite")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"user_favorite_id": userFav.ID,
	})

	span.SetAttributes(
		attribute.String("user_favorite_id", string(userFav.ID)),
	)

	utils.HandleEvent(span, localLogger, "Starting user favorite creation")

	if client == nil {
		return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DatabaseIsNotConnected})
	}

	result := client.WithContext(ctx).Create(&userFav)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrDuplicatedKey) {
			return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DuplicateKey})
		}
		return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, result.Error)
	}

	utils.HandleEvent(span, localLogger, "User favorite created successfully")
	return userFav, nil
}

func CreateUserFavoriteInBatch(ctx context.Context, userFav []models.UserFavorite, batchSize int) error {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "CreateUserFavoriteInBatch")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"user_favorite_count": len(userFav),
		"batch_size":          batchSize,
	})

	span.SetAttributes(
		attribute.Int("batch_size", batchSize),
		attribute.Int("user_favorite_count", len(userFav)),
	)

	utils.HandleEvent(span, localLogger, "Starting batch user favorite creation")

	if client == nil {
		return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DatabaseIsNotConnected})
	}

	if userFav == nil || len(userFav) == 0 {
		return utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.UserFavoriteListIsEmpty})
	}

	if batchSize == 0 {
		return utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.BatchSizeIsEmpty})
	}

	result := client.WithContext(ctx).CreateInBatches(&userFav, batchSize)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrDuplicatedKey) {
			return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DuplicateKey})
		}
		return utils.HandleError(ctx, span, localLogger, result.Error)
	}

	utils.HandleEvent(span, localLogger, "Batch user favorites created successfully")
	return nil
}

// UpdateUserFavorite updates the user post information in the database.
// Only supports the undulation of userFavorites, for this set the DeletedAt.Valid to false
func UpdateUserFavorite(ctx context.Context, userFav models.UserFavorite) error {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "UpdateUserFavorite")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"user_favorite_id": userFav.ID,
	})

	span.SetAttributes(
		attribute.String("user_favorite_id", string(userFav.ID)),
	)

	utils.HandleEvent(span, localLogger, "Starting user favorite update")

	if client == nil {
		return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DatabaseIsNotConnected})
	}

	if len(userFav.ID) == 0 {
		return utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.UserFavoriteIDIsEmpty})
	}

	if userFav.DeletedAt.Valid == true {
		return nil
	}

	result := client.WithContext(ctx).Unscoped().Model(&models.UserFavorite{}).Where("id", userFav.ID).Update("deleted_at", nil)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.NoDataFound})
		}
		return utils.HandleError(ctx, span, localLogger, result.Error)
	}

	utils.HandleEvent(span, localLogger, "User favorite updated successfully")
	return nil
}

func GetUserFavoritesByID(ctx context.Context, id models.UserFavoriteID) (models.UserFavorite, error) {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "GetUserFavoritesByID")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"user_favorite_id": id,
	})

	span.SetAttributes(
		attribute.String("user_favorite_id", string(id)),
	)

	utils.HandleEvent(span, localLogger, "Starting get user favorite by ID")

	var userFavorites models.UserFavorite

	if client == nil {
		return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DatabaseIsNotConnected})
	}

	if len(id) == 0 {
		return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.UserFavoriteIDIsEmpty})
	}

	result := client.WithContext(ctx).First(&userFavorites, "id = ?", id)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.NoDataFound})
		}
		return models.UserFavorite{}, utils.HandleError(ctx, span, localLogger, result.Error)
	}

	utils.HandleEvent(span, localLogger, "User favorite retrieved successfully")
	return userFavorites, nil
}

func DeleteUserFavorite(ctx context.Context, id models.UserFavoriteID) error {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "DeleteUserFavorite")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"user_favorite_id": id,
	})

	span.SetAttributes(
		attribute.String("user_favorite_id", string(id)),
	)

	utils.HandleEvent(span, localLogger, "Starting delete user favorite")

	var userFavorite models.UserFavorite

	if client == nil {
		return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.DatabaseIsNotConnected})
	}

	if len(id) == 0 {
		return utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.UserFavoriteIDIsEmpty})
	}

	if len(id) != 25 {
		return utils.HandleError(ctx, span, localLogger, &otterError.EntityValidationFailed{Reason: otterError.UserFavoriteIDToShort})
	}

	result := client.WithContext(ctx).Delete(&userFavorite, id)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return utils.HandleError(ctx, span, localLogger, &otterError.Database{Reason: otterError.NoDataFound})
		}
		return utils.HandleError(ctx, span, localLogger, result.Error)
	}

	utils.HandleEvent(span, localLogger, "User favorite deleted successfully")
	return nil
}