/*
 * Copyright (C) 2019 CZ.NIC z.s.p.o. (http://www.nic.cz/)
 *
 * This is free software, licensed under the GNU General Public License v3.
 * See /LICENSE for more information.
 */

import axios from "axios";
import { useCallback, useReducer } from "react";

import { ForisURLs } from "forisUrls";


const HEADERS = {
    Accept: "application/json",
    "Content-Type": "application/json",
    "X-CSRFToken": getCookie("_csrf_token"),
};

function getCookie(name) {
    let cookieValue = null;
    if (document.cookie && document.cookie !== "") {
        const cookies = document.cookie.split(";");
        for (let i = 0; i < cookies.length; i++) {
            const cookie = cookies[i].trim();
            // Does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) === (`${name}=`)) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}

export const TIMEOUT = 5000;

const API_ACTIONS = {
    INIT: 1,
    SUCCESS: 2,
    FAILURE: 3,
};

const APIGetReducer = (state, action) => {
    switch (action.type) {
    case API_ACTIONS.INIT:
        return {
            ...state,
            isLoading: true,
            isError: false,
        };
    case API_ACTIONS.SUCCESS:
        return {
            ...state,
            isLoading: false,
            isError: false,
            data: action.payload,
        };
    case API_ACTIONS.FAILURE:
        if (action.status === 403) window.location.assign(ForisURLs.login);
        return {
            ...state,
            isLoading: false,
            isError: true,
            data: action.payload,
        };
    default:
        throw new Error();
    }
};

export function useAPIGet(url) {
    const [state, dispatch] = useReducer(APIGetReducer, {
        isLoading: false,
        isError: false,
        data: null,
    });
    const get = useCallback(async () => {
        dispatch({ type: API_ACTIONS.INIT });
        try {
            const result = await axios.get(url, {
                timeout: TIMEOUT,
            });
            dispatch({ type: API_ACTIONS.SUCCESS, payload: result.data });
        } catch (error) {
            dispatch({
                type: API_ACTIONS.FAILURE,
                payload: error.response.data,
                status: error.response.status,
            });
        }
    }, [url]);

    return [state, get];
}

const APIPostReducer = (state, action) => {
    switch (action.type) {
    case API_ACTIONS.INIT:
        return {
            ...state,
            isSending: true,
            isError: false,
            isSuccess: false,
        };
    case API_ACTIONS.SUCCESS:
        return {
            ...state,
            isSending: false,
            isError: false,
            isSuccess: true,
            data: action.payload,
        };
    case API_ACTIONS.FAILURE:
        if (action.status === 403) window.location.assign(ForisURLs.login);
        return {
            ...state,
            isSending: false,
            isError: true,
            isSuccess: false,
            data: action.payload,
        };
    default:
        throw new Error();
    }
};

export function useAPIPost(url) {
    const [state, dispatch] = useReducer(APIPostReducer, {
        isSending: false,
        isError: false,
        isSuccess: false,
        data: null,
    });

    const post = async (data) => {
        dispatch({ type: API_ACTIONS.INIT });
        try {
            const result = await axios.post(url, data, {
                timeout: TIMEOUT,
                headers: HEADERS,
            });
            dispatch({ type: API_ACTIONS.SUCCESS, payload: result.data });
        } catch (error) {
            dispatch({
                type: API_ACTIONS.FAILURE,
                payload: error.response.data,
                status: error.response.status,
            });
        }
    };
    return [state, post];
}

const APIDeleteReducer = (state, action) => {
    switch (action.type) {
    case API_ACTIONS.INIT:
        return {
            ...state,
            isSending: true,
            isError: false,
            isSuccess: false,
        };
    case API_ACTIONS.SUCCESS:
        return {
            ...state,
            isSending: false,
            isError: false,
            isSuccess: true,
        };
    case API_ACTIONS.FAILURE:
        if (action.status === 403) {
            window.location.assign(ForisURLs.login);
        }
        return {
            ...state,
            isSending: false,
            isError: true,
            isSuccess: false,
            data: action.payload,
        };
    default:
        throw new Error();
    }
};

export function useAPIDelete(url) {
    const [state, dispatch] = useReducer(APIDeleteReducer, {
        isSending: false,
        isError: false,
        isSuccess: false,
        data: null,
    });

    const requestDelete = useCallback(async () => {
        dispatch({ type: API_ACTIONS.INIT });
        try {
            await axios.delete(url, {
                timeout: TIMEOUT,
                headers: HEADERS,
            });
            dispatch({ type: API_ACTIONS.SUCCESS });
        } catch (error) {
            dispatch({
                type: API_ACTIONS.FAILURE,
                payload: error.response.data,
                status: error.response.status,
            });
        }
    }, [url]);

    return [state, requestDelete];
}