package asset

import (
	"encoding/json"

	"github.com/google/uuid"

	domainAsset "base/internal/domain/asset"
)

func toCategoryModel(category *domainAsset.Category) *CategoryModel {
	return &CategoryModel{
		ID:          category.ID,
		Name:        category.Name,
		Icon:        category.Icon,
		Color:       category.Color,
		CardType:    category.CardType,
		Featured:    category.Featured,
		Description: category.Description,
	}
}

func toCategoryDomain(model *CategoryModel) *domainAsset.Category {
	return &domainAsset.Category{
		ID:          model.ID,
		Name:        model.Name,
		Icon:        model.Icon,
		Color:       model.Color,
		CardType:    model.CardType,
		Featured:    model.Featured,
		Description: model.Description,
	}
}

func toAssetModel(asset *domainAsset.Asset) *Model {
	return &Model{
		ID:              asset.ID,
		ProfileID:       asset.ProfileID,
		Status:          int(asset.Status),
		AssetCategoryID: asset.AssetCategoryID,
		Title:           asset.Title,
		Description:     asset.Description,
		Link:            asset.Link,
		Analytics:       asset.Analytics,
		CreatedAt:       asset.CreatedAt,
		UpdatedAt:       asset.UpdatedAt,
	}
}

func toAssetDomain(model *Model, category *domainAsset.Category, artifacts []domainAsset.Artifact, comments []domainAsset.Comment, reports []domainAsset.Report) *domainAsset.Asset {
	cat := domainAsset.Category{}
	if category != nil {
		cat = *category
	}
	return &domainAsset.Asset{
		ID:              model.ID,
		ProfileID:       model.ProfileID,
		Status:          domainAsset.Status(model.Status),
		AssetCategoryID: model.AssetCategoryID,
		AssetCategory:   cat,
		Title:           model.Title,
		Description:     model.Description,
		Link:            model.Link,
		Analytics:       model.Analytics,
		Reports:         reports,
		AssetArtifacts:  artifacts,
		Comments:        comments,
		CreatedAt:       model.CreatedAt,
		UpdatedAt:       model.UpdatedAt,
	}
}

func copyAssetFromModel(asset *domainAsset.Asset, model *Model) {
	asset.ID = model.ID
	asset.CreatedAt = model.CreatedAt
	asset.UpdatedAt = model.UpdatedAt
}

func toArtifactModels(assetID uuid.UUID, artifacts []domainAsset.Artifact) []ArtifactModel {
	models := make([]ArtifactModel, len(artifacts))
	for i, a := range artifacts {
		models[i] = ArtifactModel{
			AssetID:     assetID,
			Type:        a.Type,
			DownloadURL: a.DownloadURL,
			Price:       a.Price,
			Title:       a.Title,
			Description: a.Description,
		}
	}
	return models
}

func toArtifactDomains(models []ArtifactModel) []domainAsset.Artifact {
	out := make([]domainAsset.Artifact, len(models))
	for i, m := range models {
		out[i] = domainAsset.Artifact{
			ID:          m.ID,
			AssetID:     m.AssetID,
			Type:        m.Type,
			DownloadURL: m.DownloadURL,
			Price:       m.Price,
			Title:       m.Title,
			Description: m.Description,
		}
	}
	return out
}

// flattenComments turns a tree of comments (with Replies) into a single slice:
// top-level first, then each comment's replies recursively. Used when saving.
func flattenComments(comments []domainAsset.Comment) []domainAsset.Comment {
	var out []domainAsset.Comment
	for _, c := range comments {
		out = append(out, c)
		out = append(out, flattenComments(c.Replies)...)
	}
	return out
}

func toCommentModels(assetID uuid.UUID, comments []domainAsset.Comment) []CommentModel {
	flat := flattenComments(comments)
	models := make([]CommentModel, 0, len(flat))
	for _, c := range flat {
		models = append(models, CommentModel{
			AssetID:    assetID,
			Content:    c.Content,
			WriterID:   c.WriterID,
			WriterType: c.WriterType,
			ParentID:   c.ParentID,
			CreatedAt:  c.CreatedAt,
			UpdatedAt:  c.UpdatedAt,
		})
	}
	return models
}

func toCommentDomains(models []CommentModel) []domainAsset.Comment {
	out := make([]domainAsset.Comment, len(models))
	for i, m := range models {
		out[i] = domainAsset.Comment{
			ID:         m.ID,
			AssetID:    m.AssetID,
			Content:    m.Content,
			WriterID:   m.WriterID,
			WriterType: m.WriterType,
			ParentID:   m.ParentID,
			CreatedAt:  m.CreatedAt,
			UpdatedAt:  m.UpdatedAt,
		}
	}
	return buildCommentTree(out)
}

// buildCommentTree turns a flat list of comments (with ParentID set) into a tree:
// top-level comments have Replies populated; nested Replies are not further nested in this type.
func buildCommentTree(flat []domainAsset.Comment) []domainAsset.Comment {
	if len(flat) == 0 {
		return nil
	}
	byID := make(map[uuid.UUID]*domainAsset.Comment)
	for i := range flat {
		flat[i].Replies = nil
		byID[flat[i].ID] = &flat[i]
	}
	// First pass: attach replies to parents
	for i := range flat {
		c := &flat[i]
		if c.ParentID == nil {
			continue
		}
		if parent, ok := byID[*c.ParentID]; ok {
			parent.Replies = append(parent.Replies, *c)
		}
	}
	// Second pass: collect top-level comments (with Replies already populated)
	var roots []domainAsset.Comment
	for i := range flat {
		c := &flat[i]
		if c.ParentID == nil {
			roots = append(roots, *c)
		}
	}
	return roots
}

func toReportModels(assetID uuid.UUID, reports []domainAsset.Report) ([]ReportModel, error) {
	models := make([]ReportModel, len(reports))
	for i, r := range reports {
		reportedBy, err := json.Marshal(r.ReportedBy)
		if err != nil {
			return nil, err
		}
		reason, err := json.Marshal(r.Reason)
		if err != nil {
			return nil, err
		}
		var attachments json.RawMessage
		if len(r.Attachments) > 0 {
			attachments, err = json.Marshal(r.Attachments)
			if err != nil {
				return nil, err
			}
		}
		models[i] = ReportModel{
			AssetID:     assetID,
			ReportedBy:  reportedBy,
			ReportedAt:  r.ReportedAt,
			Reason:      reason,
			Status:      int(r.Status),
			Notes:       r.Notes,
			Attachments: attachments,
			CreatedAt:   r.ReportedAt,
			UpdatedAt:   r.ReportedAt,
		}
	}
	return models, nil
}

func toReportDomains(models []ReportModel) ([]domainAsset.Report, error) {
	out := make([]domainAsset.Report, len(models))
	for i, m := range models {
		var reportedBy domainAsset.ReportedBy
		if err := json.Unmarshal(m.ReportedBy, &reportedBy); err != nil {
			return nil, err
		}
		var reason domainAsset.ReportReason
		if err := json.Unmarshal(m.Reason, &reason); err != nil {
			return nil, err
		}
		var attachments []domainAsset.Attachment
		if len(m.Attachments) > 0 {
			if err := json.Unmarshal(m.Attachments, &attachments); err != nil {
				return nil, err
			}
		}
		out[i] = domainAsset.Report{
			ID:          m.ID,
			AssetID:     m.AssetID,
			ReportedBy:  reportedBy,
			ReportedAt:  m.ReportedAt,
			Reason:      reason,
			Status:      domainAsset.ReportStatus(m.Status),
			Notes:       m.Notes,
			Attachments: attachments,
		}
	}
	return out, nil
}