import { Injectable } from "@nestjs/common";
import { InjectRepository } from "@nestjs/typeorm";
import { Brackets, IsNull, Repository } from "typeorm";

import { PaginationUtils } from "../../utils/providers/pagination.utils";
import { BlogListSearchQueryDto, BlogSearchQueryDto } from "../DTO/search-blog-query.dto";
import { Blog } from "../entities/blog.entity";

@Injectable()
export class BlogsRepository extends Repository<Blog> {
  constructor(@InjectRepository(Blog) blogsRepository: Repository<Blog>) {
    super(blogsRepository.target, blogsRepository.manager, blogsRepository.queryRunner);
  }

  async findOneById(id: string): Promise<Blog | null> {
    return this.findOne({
      where: { id, deletedAt: IsNull() },
      relations: {
        author: true,
        category: true,
      },
      select: {
        id: true,
        title: true,
        previewContent: true,
        metaTitle: true,
        metaDescription: true,
        imageUrl: true,
        slug: true,
        createdAt: true,
        content: true,
        tags: true,
        category: {
          id: true,
          title: true,
          iconUrl: true,
          description: true,
        },
        author: {
          id: true,
          firstName: true,
          lastName: true,
        },
      },
    });
  }

  async findOneBySlug(slug: string): Promise<Blog | null> {
    return this.findOne({
      where: { slug, deletedAt: IsNull(), isActive: true },
    });
  }

  async fineOneByTitle(title: string): Promise<Blog | null> {
    return this.findOne({
      where: { title, deletedAt: IsNull(), isActive: true },
    });
  }
  //*********************************** */

  async getBlogsForUserSide(queryDto: BlogSearchQueryDto) {
    const { limit, skip } = PaginationUtils(queryDto);

    const queryBuilder = this.createQueryBuilder("blog")
      .where("blog.deletedAt IS NULL")
      .andWhere("blog.isActive = :isActive", { isActive: true })
      .leftJoinAndSelect("blog.category", "category")
      .leftJoinAndSelect("blog.author", "author")
      .select([
        "blog.id",
        "blog.title",
        "blog.previewContent",
        "blog.metaTitle",
        "blog.metaDescription",
        "blog.imageUrl",
        "blog.slug",
        "blog.createdAt",
        "category.id",
        "category.iconUrl",
        "category.title",
        "author.id",
        "author.firstName",
        "author.lastName",
      ]);

    if (queryDto.categoryId) {
      queryBuilder.andWhere("blog.categoryId = :categoryId", { categoryId: queryDto.categoryId });
    }

    queryBuilder.skip(skip).take(limit).orderBy("blog.createdAt", "DESC");
    return queryBuilder.getManyAndCount();
  }

  //*********************************** */
  async getBlogListForAdmin(queryDto: BlogListSearchQueryDto) {
    const { limit, skip } = PaginationUtils(queryDto);

    const queryBuilder = this.createQueryBuilder("blog")
      .where("blog.deletedAt IS NULL")
      .leftJoinAndSelect("blog.category", "category")
      .leftJoinAndSelect("blog.author", "author");

    if (queryDto.isActive) {
      queryBuilder.andWhere("blog.isActive = :isActive", { isActive: queryDto.isActive === 1 });
    }

    if (queryDto.q) {
      // queryBuilder.andWhere(
      //   "blog.title ILIKE :q OR blog.previewContent ILIKE :q OR blog.content ILIKE :q OR blog.metaTitle ILIKE :q OR blog.slug ILIKE :q",
      //   { q: `%${queryDto.q}%` },
      // );

      queryBuilder.andWhere(
        new Brackets((qb) => {
          qb.where("blog.title ILIKE :q", { q: `%${queryDto.q}%` })
            .orWhere("blog.previewContent ILIKE :q", { q: `%${queryDto.q}%` })
            .orWhere("blog.content ILIKE :q", { q: `%${queryDto.q}%` })
            .orWhere("blog.metaTitle ILIKE :q", { q: `%${queryDto.q}%` })
            .orWhere("blog.slug ILIKE :q", { q: `%${queryDto.q}%` });
        }),
      );
    }

    if (queryDto.categoryId) {
      queryBuilder.andWhere("blog.categoryId = :categoryId", { categoryId: queryDto.categoryId });
    }

    if (queryDto.since) {
      queryBuilder.andWhere("blog.createdAt >= :since", { since: queryDto.since });
    }

    queryBuilder.skip(skip).take(limit).orderBy("blog.createdAt", "DESC");

    return queryBuilder.getManyAndCount();
  }
}