App/components/Login/screens/server-authentication.tsx

import React, { useState } from "react";
import { useMutation } from "@tanstack/react-query";
import _ from "lodash";
import { JellyfinCredentials } from "../../../api/types/jellyfin-credentials";
import { getToken, Spacer, Spinner, YStack, ZStack } from "tamagui";
import { useAuthenticationContext } from "../provider";
import { H2 } from "../../Global/helpers/text";
import Button from "../../Global/helpers/button";
import { SafeAreaView } from "react-native-safe-area-context";
import Client from "../../../api/client";
import { JellifyUser } from "../../../types/JellifyUser";
import { ServerAuthenticationProps } from "../../../components/types";
import Input from "../../../components/Global/helpers/input";
import Icon from "../../../components/Global/helpers/icon";

export default function ServerAuthentication({
    route,
    navigation,
}: ServerAuthenticationProps): React.JSX.Element {

    const [username, setUsername] = useState<string | undefined>(undefined);
    const [password, setPassword] = React.useState<string | undefined>(undefined);

    const { setUser, setServer } = useAuthenticationContext();

    const useApiMutation = useMutation({
        mutationFn: async (credentials: JellyfinCredentials) => {
            return await Client.api!.authenticateUserByName(credentials.username, credentials.password!);
        },
        onSuccess: async (authResult) => {
              
            console.log(`Received auth response from server`)
            if (_.isUndefined(authResult))
                return Promise.reject(new Error("Authentication result was empty"))

            if (authResult.status >= 400 || _.isEmpty(authResult.data.AccessToken))
                return Promise.reject(new Error("Invalid credentials"))

            if (_.isUndefined(authResult.data.User))
                return Promise.reject(new Error("Unable to login"));

            console.log(`Successfully signed in to server`);

            const user : JellifyUser = { 
                id: authResult.data.User!.Id!, 
                name: authResult.data.User!.Name!, 
                accessToken: (authResult.data.AccessToken as string) 
            }

            Client.setUser(user);
            setUser(user);

            navigation.navigate("LibrarySelection", { user });
        },
        onError: async (error: Error) => {
            console.error("An error occurred connecting to the Jellyfin instance", error);
            return Promise.reject(`An error occured signing into ${Client.server!.name}`);
        }
    });

    return (
        <SafeAreaView>
            <H2 marginHorizontal={"$2"} marginVertical={"$7"}>
                { `Sign in to ${route.params.server.name}`}
            </H2>
            <Button onPress={() => { 
                Client.switchServer()
                navigation.goBack();
            }}>
                    Switch Server
            </Button>

            <YStack marginHorizontal={"$2"} alignContent="space-between">
                <Input
                    prependElement={(<Icon small name="human-greeting-variant" color={getToken("$color.amethyst")} />)}
                    placeholder="Username"
                    value={username}
                    onChangeText={(value : string | undefined) => setUsername(value)}
                    autoCapitalize="none"
                    autoCorrect={false}
                />

                <Spacer />

                <Input
                    prependElement={(<Icon small name="lock-outline" color={getToken("$color.amethyst")} />)}
                    placeholder="Password"
                    value={password}
                    onChangeText={(value : string | undefined) => setPassword(value)}
                    autoCapitalize="none"
                    autoCorrect={false}
                    secureTextEntry
                />
            </YStack>

            <ZStack>
                { useApiMutation.isPending && (
                    <Spinner />
                )}

                <Button 
                    disabled={_.isEmpty(username) || _.isEmpty(password) || useApiMutation.isPending}
                    onPress={() => {
                        
                        if (!_.isUndefined(username)) {
                            console.log(`Signing in...`);
                            useApiMutation.mutate({ username, password });
                        }
                    }}
                    >
                        Sign in
                </Button>
            </ZStack>
        </SafeAreaView>
    );
}