import { FastifyReply, FastifyRequest, FastifyInstance } from "fastify";
import {
  Controller,
  GET,
  POST,
  FastifyInstanceToken,
  Inject,
  Hook,
} from "fastify-decorators";
import { Repository } from "typeorm";
import { User } from "../entities/User";
import {
  UserNotFoundError,
  MissingBodyData,
  LoginError,
  UserExistsError,
  NotAdministratorError,
} from "../lib/api/APIErrors";
import {
  checkPassword,
  createBaseCookie,
  createToken,
  encryptPassword,
  readBaseCookie,
} from "../lib/Encryption";

@Controller("/api/user")
export class UserController {
  @Inject(FastifyInstanceToken)
  private instance!: FastifyInstance;

  private users: Repository<User> = this.instance.orm.getRepository(User);

  @GET("/login-status")
  async loginStatus(req: FastifyRequest, reply: FastifyReply) {
    return reply.send({
      user: !!req.cookies.zipline,
    });
  }

  @GET("/current")
  async currentUser(req: FastifyRequest, reply: FastifyReply) {
    if (!req.cookies.zipline) throw new LoginError(`Not logged in.`);
    const user = await this.users.findOne({
      where: {
        id: readBaseCookie(req.cookies.zipline),
      },
    });
    if (!user) throw new UserExistsError(`User doesn't exist`);
    delete user.password;
    return reply.send(user);
  }

  @POST("/login")
  async login(
    req: FastifyRequest<{ Body: { username: string; password: string } }>,
    reply: FastifyReply
  ) {
    if (req.cookies.zipline) throw new LoginError(`Already logged in.`);
    if (!req.body.username) throw new MissingBodyData(`Missing username.`);
    if (!req.body.password) throw new MissingBodyData(`Missing uassword.`);

    const user = await this.users.findOne({
      where: {
        id: readBaseCookie(req.cookies.zipline),
      },
    });

    if (!user)
      throw new UserNotFoundError(`User "${req.body.username}" was not found.`);
    if (!checkPassword(req.body.password, user.password))
      throw new LoginError(`Wrong credentials!`);
    delete user.password;

    return reply
      .setCookie("zipline", createBaseCookie(user.id), { path: "/" })
      .send(user);
  }

  @POST("/logout")
  async logout(req: FastifyRequest, reply: FastifyReply) {
    if (!req.cookies.zipline) throw new LoginError(`Not logged in.`);
    try {
      reply.clearCookie("zipline", { path: "/" }).send({ clearStore: true });
    } catch (e) {
      reply.send({ clearStore: false });
    }
  }

  @POST("/reset-token")
  async resetToken(req: FastifyRequest, reply: FastifyReply) {
    if (!req.cookies.zipline) throw new LoginError(`Not logged in.`);

    const user = await this.users.findOne({
      where: {
        id: readBaseCookie(req.cookies.zipline),
      },
    });

    if (!user) throw new UserNotFoundError(`User was not found.`);

    user.token = createToken();
    this.users.save(user);

    return reply.send({ updated: true });
  }

  @POST("/create")
  async create(
    req: FastifyRequest<{
      Body: { username: string; password: string; administrator: boolean };
    }>,
    reply: FastifyReply
  ) {
    if (!req.body.username) throw new MissingBodyData(`Missing username.`);
    if (!req.body.password) throw new MissingBodyData(`Missing uassword.`);

    const existing = await this.users.findOne({
      where: { username: req.body.username },
    });
    if (existing) throw new UserExistsError("User exists already");

    try {
      const user = await this.users.save(
        new User(
          req.body.username,
          req.body.password,
          createToken(),
          req.body.administrator || false
        )
      );
      delete user.password;
      return reply.send(user);
    } catch (e) {
      throw new Error(`Could not create user: ${e.message}`);
    }
  }

  @Hook("preValidation")
  public async preValidation(req: FastifyRequest, reply: FastifyReply) {
    // const adminRoutes = ['/api/user/create'];
    // if (adminRoutes.includes(req.routerPath)) {
    //   if (!req.cookies.zipline) return reply.send({ error: "You are not logged in" });
    //   const admin = await this.instance.mongo.db.collection('zipline_users').findOne({ _id: req.cookies.zipline });
    //   if (!admin) return reply.send({ error: "You are not an administrator" });
    //   return;
    // }
    // return;
  }
}