package database

import (
	"context"
	"errors"
	otterError "git.anthrove.art/Anthrove/otter-space-sdk/v2/pkg/error"
	"git.anthrove.art/Anthrove/otter-space-sdk/v2/pkg/models"
	"gorm.io/gorm"
)

func CreatePost(ctx context.Context, post models.Post) (models.Post, error) {
	if client == nil {
		return models.Post{}, &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{}, &otterError.Database{Reason: otterError.DuplicateKey}
		}
		return models.Post{}, result.Error
	}

	return post, nil
}

func CreatePostInBatch(ctx context.Context, post []models.Post, batchSize int) error {
	if client == nil {
		return &otterError.Database{Reason: otterError.DatabaseIsNotConnected}
	}

	if post == nil {
		return &otterError.EntityValidationFailed{Reason: otterError.PostListIsEmpty}
	}

	if len(post) == 0 {
		return &otterError.EntityValidationFailed{Reason: otterError.PostListIsEmpty}
	}

	if batchSize == 0 {
		return &otterError.EntityValidationFailed{Reason: otterError.BatchSizeIsEmpty}
	}

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

	return nil
}

func GetPostByID(ctx context.Context, id models.PostID) (models.Post, error) {
	var post models.Post

	if client == nil {
		return models.Post{}, &otterError.Database{Reason: otterError.DatabaseIsNotConnected}
	}

	if len(id) == 0 {
		return models.Post{}, &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{}, &otterError.Database{Reason: otterError.NoDataFound}
		}
		return models.Post{}, result.Error
	}

	return post, nil
}

func UpdatePost(ctx context.Context, anthrovePost models.Post) error {
	if client == nil {
		return &otterError.Database{Reason: otterError.DatabaseIsNotConnected}
	}

	if len(anthrovePost.ID) == 0 {
		return &otterError.EntityValidationFailed{Reason: otterError.PostIDIsEmpty}
	}

	updatePost := models.Post{
		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 &otterError.Database{Reason: otterError.NoDataFound}
		}
		return result.Error
	}

	return nil
}

func DeletePost(ctx context.Context, id models.PostID) error {
	var userFavorite models.UserFavorite

	if client == nil {
		return &otterError.Database{Reason: otterError.DatabaseIsNotConnected}
	}

	if len(id) == 0 {
		return &otterError.EntityValidationFailed{Reason: otterError.PostIDIsEmpty}
	}

	if len(id) != 25 {
		return &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 &otterError.Database{Reason: otterError.NoDataFound}
		}
		return result.Error
	}

	return nil
}