import { Controller, Get, Headers, Param, Query, Res, UseGuards } from "@nestjs/common";
import { FastifyReply } from "fastify";
import { lookup } from "mime-types";
import { BookQueryDto, BookQuerySchema } from "@readabook/shared";
import { AuthGuard } from "../auth/auth.guard.js";
import { ZodValidationPipe } from "../common/zod-validation.pipe.js";
import { BooksService } from "./books.service.js";

@Controller("books")
@UseGuards(AuthGuard)
export class BooksController {
  constructor(private readonly books: BooksService) {}

  @Get()
  list(@Query(new ZodValidationPipe(BookQuerySchema)) query: BookQueryDto) {
    return this.books.list(query);
  }

  @Get("search")
  search(@Query(new ZodValidationPipe(BookQuerySchema)) query: BookQueryDto) {
    return query.q ? this.books.search(query.q, query.limit, query.offset) : [];
  }

  @Get(":id")
  get(@Param("id") id: string) {
    return this.books.get(Number(id));
  }

  @Get(":id/pages")
  pages(@Param("id") id: string) {
    return this.books.listComicPages(Number(id));
  }

  @Get(":id/pages/:page")
  async page(@Param("id") id: string, @Param("page") page: string, @Res() reply: FastifyReply) {
    const result = await this.books.readComicPage(Number(id), Number(page));
    reply.header("Content-Type", result.contentType);
    reply.header("Cache-Control", "private, max-age=3600");
    return reply.send(result.data);
  }

  @Get(":id/file")
  file(@Param("id") id: string, @Headers("range") range: string | undefined, @Res() reply: FastifyReply) {
    const { book, stream, contentLength, contentType, end, partial, size, start } = this.books.streamFile(Number(id), range);
    if (partial) {
      reply.code(206);
      reply.header("Content-Range", `bytes ${start}-${end}/${size}`);
    }
    reply.header("Accept-Ranges", "bytes");
    reply.header("Content-Length", String(contentLength));
    reply.header("Content-Type", contentType || lookup(book.filePath) || "application/octet-stream");
    reply.header("Content-Disposition", `inline; filename*=UTF-8''${encodeURIComponent(`${book.title}.${book.format}`)}`);
    reply.header("X-Content-Type-Options", "nosniff");
    return reply.send(stream);
  }

  @Get(":id/cover")
  cover(@Param("id") id: string, @Res() reply: FastifyReply) {
    const { coverPath, stream } = this.books.streamCover(Number(id));
    reply.header("Content-Type", lookup(coverPath) || "image/jpeg");
    return reply.send(stream);
  }
}