const allowRetry = (retries, maxRetries) => retries < maxRetries;
const FetchMachine = Machine({
    id: "fetch",
    initial: "idle",
    context: {
        request: null,
        data: null,
        error: null,
        retries: 0,
        maxRetries: 0,
    },
    states: {
        idle: {
            on: {
                FETCH: "pending",
            },
        },
        pending: {
            invoke: {
                src: "fetch",
                onDone: {
                    target: "success",
                    actions: ["setData", "notifySuccess"],
                },
                onError: {
                    target: "failure",
                    actions: ["setError", "notifyError"],
                },
            },
        },
        failure: {
            on: {
                "": {
                    target: "finalFailure",
                    cond: "canNotRetry",
                },
                RETRY: {
                    target: "pending",
                    actions: "incrementRetries",
                },
            },
        },
        finalFailure: {
            on: {},
            type: "final",
        },
        success: {
            on: {
                REFRESH: {
                    target: "pending",
                    actions: "resetRetries",
                },
            },
        },
    },
}, {
    guards: {
        canNotRetry: ({ retries, maxRetries }) => !allowRetry(retries, maxRetries),
    },
    actions: {
        setData: assign({ data: (_, event) => event.data }),
        setError: assign({ error: (_, event) => event.data.message }),
        incrementRetries: assign({ retries: context => context.retries + 1 }),
        resetRetries: assign({ retries: context => 0 }),
        notifySuccess: context => { },
        notifyError: context => { },
    },
    services: {
        fetch: async ({ request }) => {
            if (!request) {
                throw new Error("Machine must receive a valid request object in context");
            }
            const response = await request();
            return response.data;
        },
    },
});