package postgres

import (
	"context"
	"errors"

	"gorm.io/gorm/clause"

	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"
	"gorm.io/gorm"
)

func CreateTag(ctx context.Context, db *gorm.DB, tagName models.AnthroveTagName, tagType models.TagType) error {

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

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

	result := db.WithContext(ctx).Create(&models.Tag{Name: string(tagName), Type: tagType})
	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": tagName,
		"tag_type": tagType,
	}).Trace("database: created tag node")

	return nil
}

func CreateTagInBatchAndUpdate(ctx context.Context, db *gorm.DB, tags []models.Tag, batchSize int) error {
	if len(tags) == 0 {
		return &otterError.EntityValidationFailed{Reason: "tags cannot be empty"}
	}

	if tags == nil {
		return &otterError.EntityValidationFailed{Reason: "tags cannot be nil"}
	}

	if batchSize == 0 {
		return &otterError.EntityValidationFailed{Reason: "batch size cannot be zero"}
	}

	result := db.WithContext(ctx).
		Clauses(clause.OnConflict{
			Columns:   []clause.Column{{Name: "name"}},
			DoUpdates: clause.AssignmentColumns([]string{"tag_type"}),
		}).CreateInBatches(tags, batchSize)
	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_size":   len(tags),
		"batch_size": batchSize,
	}).Trace("database: created tag node")

	return nil
}

func DeleteTag(ctx context.Context, db *gorm.DB, tagName models.AnthroveTagName) error {

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

	result := db.WithContext(ctx).Delete(&models.Tag{Name: string(tagName)})

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return &otterError.NoDataFound{}
		}
		return result.Error
	}

	log.WithFields(log.Fields{
		"tag_name": tagName,
	}).Trace("database: deleted tag")

	return nil
}

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

	if tagType == "" {
		return nil, &otterError.EntityValidationFailed{Reason: "tagType cannot be empty"}
	}

	result := db.WithContext(ctx).Model(&models.Tag{}).Where("tag_type = ?", tagType).Scan(&tags)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

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

	return tags, 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
}

func CreateTagAlias(ctx context.Context, db *gorm.DB, tagAliasName models.AnthroveTagAliasName, tagID models.AnthroveTagID) error {

	if tagAliasName == "" {
		return &otterError.EntityValidationFailed{Reason: "tagAliasName cannot be empty"}
	}
	if tagID == "" {
		return &otterError.EntityValidationFailed{Reason: otterError.AnthroveTagIDEmpty}
	}

	result := db.WithContext(ctx).Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "name"}},
		DoNothing: true,
	}).Create(&models.TagAlias{
		Name:  string(tagAliasName),
		TagID: string(tagID),
	})

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrDuplicatedKey) {
			return &otterError.EntityAlreadyExists{}
		}
		return result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_name":   tagAliasName,
		"tag_alias_tag_id": tagID,
	}).Trace("database: created tagAlias")

	return nil
}

func CreateTagAliasInBatch(ctx context.Context, db *gorm.DB, tagAliases []models.TagAlias, batchSize int) error {
	if len(tagAliases) == 0 {
		return &otterError.EntityValidationFailed{Reason: "tagAliases cannot be empty"}
	}

	if tagAliases == nil {
		return &otterError.EntityValidationFailed{Reason: "tagAliases cannot be nil"}
	}

	if batchSize == 0 {
		return &otterError.EntityValidationFailed{Reason: "batch size cannot be zero"}
	}

	result := db.WithContext(ctx).Clauses(clause.OnConflict{
		Columns:   []clause.Column{{Name: "name"}},
		DoNothing: true,
	}).CreateInBatches(tagAliases, batchSize)
	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_size":   len(tagAliases),
		"batch_size": batchSize,
	}).Trace("database: created tag node")

	return nil
}

func GetAllTagAlias(ctx context.Context, db *gorm.DB) ([]models.TagAlias, error) {
	var tagAliases []models.TagAlias

	result := db.WithContext(ctx).Find(&tagAliases)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_length": len(tagAliases),
	}).Trace("database: created tagAlias")

	return tagAliases, nil
}

func GetAllTagAliasByTag(ctx context.Context, db *gorm.DB, tagID models.AnthroveTagID) ([]models.TagAlias, error) {
	var tagAliases []models.TagAlias

	if tagID == "" {
		return nil, &otterError.EntityValidationFailed{Reason: otterError.AnthroveTagIDEmpty}
	}

	result := db.WithContext(ctx).Where("tag_id = ?", tagID).Find(&tagAliases)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_length": len(tagAliases),
		"tag_alias_tag_id": tagID,
	}).Trace("database: get specific tagAlias")

	return tagAliases, nil
}

func DeleteTagAlias(ctx context.Context, db *gorm.DB, tagAliasName models.AnthroveTagAliasName) error {

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

	result := db.WithContext(ctx).Delete(&models.TagAlias{Name: string(tagAliasName)})

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return &otterError.NoDataFound{}
		}
		return result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_name": tagAliasName,
	}).Trace("database: deleted tagAlias")

	return nil
}

func CreateTagGroup(ctx context.Context, db *gorm.DB, tagGroupName models.AnthroveTagGroupName, tagID models.AnthroveTagID) error {

	if tagGroupName == "" {
		return &otterError.EntityValidationFailed{Reason: "tagGroupName cannot be empty"}
	}
	if tagID == "" {
		return &otterError.EntityValidationFailed{Reason: otterError.AnthroveTagIDEmpty}
	}

	result := db.WithContext(ctx).Create(&models.TagGroup{
		Name:  string(tagGroupName),
		TagID: string(tagID),
	})

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrDuplicatedKey) {
			return &otterError.EntityAlreadyExists{}
		}
		return result.Error
	}

	log.WithFields(log.Fields{
		"tag_group_name":   tagGroupName,
		"tag_group_tag_id": tagID,
	}).Trace("database: created tagGroup")

	return nil
}

func CreateTagGroupInBatch(ctx context.Context, db *gorm.DB, tagGroups []models.TagGroup, batchSize int) error {
	if len(tagGroups) == 0 {
		return &otterError.EntityValidationFailed{Reason: "tagAliases cannot be empty"}
	}

	if tagGroups == nil {
		return &otterError.EntityValidationFailed{Reason: "tagAliases cannot be nil"}
	}

	if batchSize == 0 {
		return &otterError.EntityValidationFailed{Reason: "batch size cannot be zero"}
	}

	result := db.WithContext(ctx).CreateInBatches(tagGroups, batchSize)
	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_size":   len(tagGroups),
		"batch_size": batchSize,
	}).Trace("database: created tag node")

	return nil
}

func GetAllTagGroup(ctx context.Context, db *gorm.DB) ([]models.TagGroup, error) {
	var tagGroups []models.TagGroup

	result := db.WithContext(ctx).Find(&tagGroups)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_length": len(tagGroups),
	}).Trace("database: created tagGroup")

	return tagGroups, nil
}

func GetAllTagGroupByTag(ctx context.Context, db *gorm.DB, tagID models.AnthroveTagID) ([]models.TagGroup, error) {
	var tagGroups []models.TagGroup

	if tagID == "" {
		return nil, &otterError.EntityValidationFailed{Reason: otterError.AnthroveTagIDEmpty}
	}

	result := db.WithContext(ctx).Where("tag_id = ?", tagID).Find(&tagGroups)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return nil, &otterError.NoDataFound{}
		}
		return nil, result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_length": len(tagGroups),
		"tag_alias_tag_id": tagID,
	}).Trace("database: get specific tagGroup")

	return tagGroups, nil
}

func DeleteTagGroup(ctx context.Context, db *gorm.DB, tagGroupName models.AnthroveTagGroupName) error {

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

	result := db.WithContext(ctx).Delete(&models.TagGroup{Name: string(tagGroupName)})

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return &otterError.NoDataFound{}
		}
		return result.Error
	}

	log.WithFields(log.Fields{
		"tag_alias_name": tagGroupName,
	}).Trace("database: deleted tagAlias")

	return nil
}