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 CreatePost(ctx context.Context, post models.Post) (models.Post, error) {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "CreatePost")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"post_id": post.ID,
	})

	span.SetAttributes(
		attribute.String("post_id", string(post.ID)),
	)

	utils.HandleEvent(span, localLogger, "Starting post creation")

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

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

	utils.HandleEvent(span, localLogger, "Post created successfully")
	return post, nil
}

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

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

	span.SetAttributes(
		attribute.Int("batch_size", batchSize),
		attribute.Int("post_count", len(post)),
	)

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

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

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

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

	result := client.WithContext(ctx).CreateInBatches(&post, 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 posts created successfully")
	return nil
}

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

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

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

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

	var post models.Post

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

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

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

	utils.HandleEvent(span, localLogger, "Post retrieved successfully")
	return post, nil
}

// UpdatePost updates the user post information in the database.
// Only a few parameter can be updated:
//   - Rating
//   - Tags
//   - References
func UpdatePost(ctx context.Context, anthrovePost models.Post) error {
	ctx, span, localLogger := utils.SetupTracing(ctx, tracer, "UpdatePost")
	defer span.End()

	localLogger = localLogger.WithFields(log.Fields{
		"post_id": anthrovePost.ID,
	})

	span.SetAttributes(
		attribute.String("post_id", string(anthrovePost.ID)),
	)

	utils.HandleEvent(span, localLogger, "Starting post update")

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

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

	updatePost := models.Post{
		BaseModel: models.BaseModel[models.PostID]{
			ID: anthrovePost.ID,
		},
		Rating:     anthrovePost.Rating,
		Tags:       anthrovePost.Tags,
		References: anthrovePost.References,
	}

	result := client.WithContext(ctx).Model(&updatePost).Update("deleted_at", gorm.DeletedAt{})
	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, "Post updated successfully")
	return nil
}

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

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

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

	utils.HandleEvent(span, localLogger, "Starting delete post")

	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.PostIDIsEmpty})
	}

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

	result := client.WithContext(ctx).Delete(&userFavorite, "id = ?", 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, "Post deleted successfully")
	return nil
}