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

    return queryBuilder.getOne();
  }

  async findOneBySlug(slug: string): Promise<Blog | null> {
    const queryBuilder = this.createQueryBuilder("blog")
      .leftJoinAndSelect("blog.author", "author")
      .leftJoinAndSelect("blog.category", "category")
      .where("blog.slug = :slug", { slug })
      .andWhere("blog.deletedAt IS NULL")
      .andWhere("blog.isActive = :isActive", { isActive: true })
      .select([
        "blog.id",
        "blog.title",
        "blog.previewContent",
        "blog.metaTitle",
        "blog.metaDescription",
        "blog.imageUrl",
        "blog.slug",
        "blog.createdAt",
        "blog.content",
        "blog.tags",
        "blog.viewCount",
        "category.id",
        "category.title",
        "category.iconUrl",
        "category.description",
        "author.id",
        "author.firstName",
        "author.lastName",
      ]);

    return queryBuilder.getOne();
  }

  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",
        "blog.viewCount",
        "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();
  }

  async getMostVisitedBlogs(limit: number = 5) {
    return 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",
        "blog.viewCount",
        "category.id",
        "category.iconUrl",
        "category.title",
        "author.id",
        "author.firstName",
        "author.lastName",
      ])
      .orderBy("blog.viewCount", "DESC")
      .take(limit)
      .getMany();
  }

  async getPinnedBlogs(limit: number = 4) {
    return this.createQueryBuilder("blog")
      .where("blog.deletedAt IS NULL")
      .andWhere("blog.isActive = :isActive", { isActive: true })
      .andWhere("blog.isPinned = :isPinned", { isPinned: true })
      .select([
        "blog.id",
        "blog.title",
        "blog.previewContent",
        "blog.metaTitle",
        "blog.metaDescription",
        "blog.imageUrl",
        "blog.slug",
        "blog.createdAt",
        "blog.viewCount",
      ])
      .orderBy("blog.createdAt", "DESC")
      .take(limit)
      .getMany();
  }
}