import { Console } from "hsconsole";
import UserRepo from "../repos/UserRepo";
import PasswordUtility from "../utilities/PasswordUtility";
import UserType from "../enums/UserType";
import User from "../entities/User";
import MediaRepo from "../repos/MediaRepo";
import { type MultipartFile } from "@fastify/multipart"
import HashFS from "../objects/HashFS";
import Media from "../entities/Media";
import { randomBytes } from "crypto";
import DomainRepo from "../repos/DomainRepo";

export default abstract class UserService {
	public static async AuthenticateUser(username:string, password:string) {
		try {
			const user = await UserRepo.SelectByUsername(username);
			if (!user) {
				return null;
			}

			if (await PasswordUtility.ValidatePassword(user.PasswordHash, user.PasswordSalt, password)) {
				return user;
			}

			return null;
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async GetUser(id:number) {
		try {
			return await UserRepo.SelectById(id);
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async GetAll() {
		try {
			return await UserRepo.SelectAll();
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async GetUserByUsername(username:string) {
		try {
			return await UserRepo.SelectByUsername(username);
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async CreateUser(currentUserId: number, username: string, email: string, password: string) {
		try {
			const existingCheck = await UserRepo.SelectByUsername(username);
			if (existingCheck) {
				return null;
			}

			const user = new User();
			user.UserType = UserType.User;
			user.Username = username;
			user.EmailAddress = email;
			user.PasswordSalt = PasswordUtility.GenerateSalt();
			user.PasswordHash = await PasswordUtility.HashPassword(user.PasswordSalt, password);
			user.ApiKey = randomBytes(64).toString("base64url");
			user.UploadKey = randomBytes(64).toString("base64url");

			user.CreatedByUserId = currentUserId;
			user.CreatedDatetime = new Date();

			await UserRepo.InsertUpdate(user);

			return user;
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async GetRecentUploads(currentUserId: number) {
		try {
			return await MediaRepo.SelectRecentMedia(currentUserId, 10);
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async GetByUploadKey(uploadKey: string) {
		try {
			return await UserRepo.SelectByUploadKey(uploadKey);
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}

	public static async UploadMedia(currentUserId: number, host: string, data: MultipartFile) {
		try {
			const fileInfo = await HashFS.GetHashFSInstance("images").AddFromStream(data.file);

			const domain = await DomainRepo.SelectByDomain(host);
			if (!domain) {
				return null;
			}
			
			let media = await MediaRepo.SelectByUserHash(currentUserId, fileInfo.fileHash);
			if (!media) {
				media = new Media();
				media.CreatedByUserId = currentUserId;
				media.CreatedDatetime = new Date();

				media.UserId = currentUserId;
				media.DomainId = domain.Id; // TODO: Make this come from the host. Only EUS's domain is supported for now.
				media.FileName = data.filename;
				media.MediaTag = randomBytes(12).toString("base64url");
				media.MediaType = data.mimetype;
				media.Hash = fileInfo.fileHash;
				media.FileSize = fileInfo.fileSize;

				await MediaRepo.InsertUpdate(media);
			}

			return `${domain.HasHttps ? "https" : "http"}://${domain.Domain}/${media.MediaTag}`;
		} catch (e) {
			Console.printError(`EUS server service error:\n${e}`);
			throw e;
		}
	}
}