import { RequestHandler } from "../entities/RequestHandler";
import { UserHelper } from "../helpers/UserHelper";
import { User, UserPageStatus } from "../entities/User";
import { AccountImage, AccountImageVisibilityLevel } from "../entities/AccountImage";

/**
 * User information controller
 * 
 * @author Pierre HUBERT
 */

export class UserController {

	/**
	 * Get information about a single user
	 */
	public static async GetSingle(handler : RequestHandler) {
		const userID = handler.postInt("userID");
		const user = await UserHelper.GetUserInfo(userID);

		if(!user)
			handler.error(404, "Could not get user data!");
		
		handler.send(this.UserToAPI(user, handler));
	}

	/**
	 * Get information about multiple users
	 */
	public static async GetMultiple(handler : RequestHandler) {
		
		let list = {};
		const IDs = handler.postNumbersList("usersID");

		for (const id of IDs) {
			if(list.hasOwnProperty(id))
				continue;
			
			const user = await UserHelper.GetUserInfo(id);

			if(!user)
				handler.error(404, "One user was not found!");
			
			list[id] = this.UserToAPI(user, handler);
		}

		handler.send(list);
	}

	/**
	 * Get advanced information about a user
	 * 
	 * @param h Request handler
	 */
	public static async GetAdvancedInfo(h: RequestHandler) {
		const userID = await h.postUserId("userID");

		if(!await UserHelper.CanSeeUserPage(h.optionnalUserID, userID))
			h.error(401, "You are not allowed to access these information!");
		
		h.send("Go on");
	}


	private static UserToAPI(user : User, handler: RequestHandler) : Object {
		return {
			"userID": user.id,
			"firstName": user.firstName,
			"lastName": user.lastName,
			"publicPage": user.pageStatus == UserPageStatus.PUBLIC,
			"openPage": user.pageStatus == UserPageStatus.OPEN,
			"virtualDirectory": user.virtualDirectory,
			"accountImage": this.GetAccountImageURL(user.accountImage, handler)
		};
	}

	private static GetAccountImageURL(image : AccountImage, handler: RequestHandler) {
		
		if(image.level == AccountImageVisibilityLevel.EVERYONE 
			|| (handler.signedIn && handler.getUserId() == image.userID))
			return image.url;

		if(image.level == AccountImageVisibilityLevel.COMUNIC_USERS) {
			if(handler.signedIn)
				return image.url;
			else
				return AccountImage.errorURL;
		}
		
		// TODO : implement frienship support
		console.error("ERR: Can not check friends for now (for account image)!");
		
		return AccountImage.errorURL;
	}
}