package postgres

import (
	"context"
	"errors"

	otterError "git.dragse.it/anthrove/otter-space-sdk/pkg/error"
	"git.dragse.it/anthrove/otter-space-sdk/pkg/models"
	log "github.com/sirupsen/logrus"
	"gorm.io/gorm"
)

func CreateTag(ctx context.Context, db *gorm.DB, tag *models.Tag) error {

	if tag == nil {
		return &otterError.EntityValidationFailed{Reason: "Tag is nil"}
	}

	result := db.WithContext(ctx).Create(tag)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrDuplicatedKey) {
			return &otterError.EntityAlreadyExists{}
		}
		return result.Error
	}

	if result.RowsAffected == 0 {
		return &otterError.NoDataWritten{}
	}

	log.WithFields(log.Fields{
		"tag_name": tag.Name,
		"tag_type": tag.Type,
	}).Trace("database: created tag node")

	return nil
}

func CreateTagAndReferenceToPost(ctx context.Context, db *gorm.DB, anthrovePostID models.AnthrovePostID, tag *models.Tag) error {

	if anthrovePostID == "" {
		return &otterError.EntityValidationFailed{Reason: "anthrovePostID cannot be empty"}
	}

	if len(anthrovePostID) != 25 {
		return &otterError.EntityValidationFailed{Reason: "anthrovePostID needs to be 25 characters long"}
	}

	if tag == nil {
		return &otterError.EntityValidationFailed{Reason: "Tag is nil"}
	}

	pgPost := models.Post{
		BaseModel: models.BaseModel[models.AnthrovePostID]{
			ID: anthrovePostID,
		},
	}

	err := db.WithContext(ctx).Model(&pgPost).Association("Tags").Append(tag)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			return &otterError.NoDataFound{}
		}
		return errors.Join(err, &otterError.NoRelationCreated{})
	}

	log.WithFields(log.Fields{
		"anthrove_post_id": anthrovePostID,
		"tag_name":         tag.Name,
		"tag_type":         tag.Type,
	}).Trace("database: created tag node")

	return nil
}

func GetTags(ctx context.Context, db *gorm.DB) ([]models.Tag, error) {
	var tags []models.Tag

	result := db.WithContext(ctx).Find(&tags)
	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

	log.WithFields(log.Fields{
		"tag_amount": len(tags),
	}).Trace("database: got tags")

	return tags, nil
}