// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
//go:build plus

package posts

import (
	"context"
	"errors"
	"github.com/TeaOSLab/EdgeAPI/internal/db/models/posts"
	"github.com/TeaOSLab/EdgeAPI/internal/rpc/services"
	"github.com/TeaOSLab/EdgeCommon/pkg/rpc/pb"
)

// PostService 文章服务
type PostService struct {
	services.BaseService
}

// CreatePost 创建文章
func (this *PostService) CreatePost(ctx context.Context, req *pb.CreatePostRequest) (*pb.CreatePostResponse, error) {
	_, err := this.ValidateAdmin(ctx)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()

	if !posts.SharedPostDAO.IsValidType(req.Type) {
		return nil, errors.New("invalid 'type' value: " + req.Type)
	}

	postId, err := posts.SharedPostDAO.CreatePost(tx, req.ProductCode, req.PostCategoryId, req.Subject, req.Type, req.Body, req.Url)
	if err != nil {
		return nil, err
	}
	return &pb.CreatePostResponse{PostId: postId}, nil
}

// UpdatePost 修改文章
func (this *PostService) UpdatePost(ctx context.Context, req *pb.UpdatePostRequest) (*pb.RPCSuccess, error) {
	_, err := this.ValidateAdmin(ctx)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()

	if !posts.SharedPostDAO.IsValidType(req.Type) {
		return nil, errors.New("invalid 'type' value: " + req.Type)
	}

	err = posts.SharedPostDAO.UpdatePost(tx, req.PostId, req.ProductCode, req.PostCategoryId, req.Subject, req.Type, req.Body, req.Url)
	if err != nil {
		return nil, err
	}

	return this.Success()
}

// DeletePost 删除文章
func (this *PostService) DeletePost(ctx context.Context, req *pb.DeletePostRequest) (*pb.RPCSuccess, error) {
	_, err := this.ValidateAdmin(ctx)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()
	err = posts.SharedPostDAO.DisablePost(tx, req.PostId)
	if err != nil {
		return nil, err
	}

	return this.Success()
}

// PublishPost 发布文章
func (this *PostService) PublishPost(ctx context.Context, req *pb.PublishPostRequest) (*pb.RPCSuccess, error) {
	_, err := this.ValidateAdmin(ctx)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()
	err = posts.SharedPostDAO.PublishPost(tx, req.PostId)
	if err != nil {
		return nil, err
	}
	return this.Success()
}

// CountPosts 计算文章数量
func (this *PostService) CountPosts(ctx context.Context, req *pb.CountPostsRequest) (*pb.RPCCountResponse, error) {
	_, err := this.ValidateAdmin(ctx)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()
	count, err := posts.SharedPostDAO.CountPosts(tx, req.ProductCode, req.PostCategoryId, req.PublishedOnly)
	if err != nil {
		return nil, err
	}
	return this.SuccessCount(count)
}

// ListPosts 列出单页文章
func (this *PostService) ListPosts(ctx context.Context, req *pb.ListPostsRequest) (*pb.ListPostsResponse, error) {
	_, userId, err := this.ValidateAdminAndUser(ctx, true)
	if err != nil {
		return nil, err
	}

	// check permission
	if userId > 0 {
		req.PublishedOnly = true
	}

	var tx = this.NullTx()
	var categoryId int64
	if len(req.PostCategoryCode) > 0 {
		categoryId, err = posts.SharedPostCategoryDAO.FindCategoryIdWithCode(tx, req.PostCategoryCode)
		if err != nil {
			return nil, err
		}
	}

	if req.PostCategoryId > 0 {
		categoryId = req.PostCategoryId
	}

	var excludingCategoryId int64
	if len(req.ExcludingPostCategoryCode) > 0 {
		excludingCategoryId, err = posts.SharedPostCategoryDAO.FindCategoryIdWithCode(tx, req.ExcludingPostCategoryCode)
		if err != nil {
			return nil, err
		}
	}

	postList, err := posts.SharedPostDAO.ListPosts(tx, req.ProductCode, categoryId, excludingCategoryId, req.PublishedOnly, req.ContainsBody, req.Offset, req.Size)
	if err != nil {
		return nil, err
	}
	var pbPosts []*pb.Post
	for _, post := range postList {
		category, err := posts.SharedPostCategoryDAO.FindEnabledPostCategory(tx, int64(post.CategoryId))
		if err != nil {
			return nil, err
		}
		var pbCategory *pb.PostCategory
		if category != nil {
			pbCategory = &pb.PostCategory{
				Id:   int64(category.Id),
				Name: category.Name,
				Code: category.Code,
				IsOn: category.IsOn,
			}
		}

		pbPosts = append(pbPosts, &pb.Post{
			Id:             int64(post.Id),
			ProductCode:    post.ProductCode,
			PostCategoryId: int64(post.CategoryId),
			Type:           post.Type,
			Subject:        post.Subject,
			Url:            post.Url,
			Body:           post.Body,
			CreatedAt:      int64(post.CreatedAt),
			IsPublished:    post.IsPublished,
			PublishedAt:    int64(post.PublishedAt),
			PostCategory:   pbCategory,
		})
	}

	return &pb.ListPostsResponse{
		Posts: pbPosts,
	}, nil
}

// FindPost 查询单篇文章
func (this *PostService) FindPost(ctx context.Context, req *pb.FindPostRequest) (*pb.FindPostResponse, error) {
	_, userId, err := this.ValidateAdminAndUser(ctx, true)
	if err != nil {
		return nil, err
	}

	var tx = this.NullTx()
	post, err := posts.SharedPostDAO.FindEnabledPost(tx, req.PostId)
	if err != nil {
		return nil, err
	}
	if post == nil {
		return &pb.FindPostResponse{Post: nil}, nil
	}

	// check permission
	if userId > 0 && !post.IsPublished {
		return &pb.FindPostResponse{Post: nil}, nil
	}

	category, err := posts.SharedPostCategoryDAO.FindEnabledPostCategory(tx, int64(post.CategoryId))
	if err != nil {
		return nil, err
	}
	var pbCategory *pb.PostCategory
	if category != nil {
		pbCategory = &pb.PostCategory{
			Id:   int64(category.Id),
			Name: category.Name,
			Code: category.Code,
			IsOn: category.IsOn,
		}
	}

	return &pb.FindPostResponse{
		Post: &pb.Post{
			Id:             int64(post.Id),
			ProductCode:    post.ProductCode,
			PostCategoryId: int64(post.CategoryId),
			Type:           post.Type,
			Subject:        post.Subject,
			Url:            post.Url,
			Body:           post.Body,
			CreatedAt:      int64(post.CreatedAt),
			IsPublished:    post.IsPublished,
			PublishedAt:    int64(post.PublishedAt),
			PostCategory:   pbCategory,
		},
	}, nil
}