const STATES = { // Either the non-d
    auth: "{{ state.auth }}",
    error: "{{ state.error }}",
    loading: "{{ state.loading }}",
    repoSelected: "{{ state.repo_selected }}",
    repoCreated: "{{ state.repo_created }}",
    buttonOn: "{{ state.button_on }}",
    featureOn: "{{ state.feature_on }}",
    confirmOn: "{{ state.confirm_on }}",
}

var G_REPO_VALUE = "",
    G_CONFIRM_VALUE = "",
    G_CONFIRM = -1;

// UTILITY //

// Parse a query string into an object
function parseQueryString(string) {
    if(string == "") { return {}; }
    var segments = string.split("&").map(s => s.split("=") );
    var queryString = {};
    segments.forEach(s => queryString[s[0]] = s[1]);
    return queryString;
}

// BUTTON ONCLICK MIDDLEWARE //

// Refresh token if necessary.
function tryAuth(f) {
    return async (e) => {
        e.preventDefault();
        if (!G_AUTH) return;
        await tryRefresh();
        await f(e);
    }
}

// Adds loading classes for UI while awaiting.
function doLoading(f) {
    return async (e) => {
        if (e.target.hasClass("loading")) return;
        e.target.addClass(STATES["loading"]);
        await f(e);
        e.target.delClass(STATES["loading"]);
    }
}

// BUTTON ONCLICK HELPERS //

function setRepoError(s, err) {
    const input = get("#repoSelectInput"),
          error = get("#repoSelectError"),
          info = get("#repoInfo");
    error.innerText = s;
    info.setClass(STATES["repoSelected"], !err);
    input.setClass(STATES["error"], err);
}

function setRepoActions(s) {
    get("#repoCreate").setClass(STATES["buttonOn"], !s);
    get("#repoDelete").setClass(STATES["buttonOn"], s);
    get("#repoSecret").setClass(STATES["buttonOn"], s);
    get("#repoFeatures").setClass(STATES["repoCreated"], s);
}

async function getConfirm() {
    get("#confirmOverlay").addClass(STATES["confirmOn"]);
    return new Promise((resolve, reject) => {
        const check = function() {
            if (G_CONFIRM == -1) {
                setTimeout(check, 100);
            } else {
                get("#confirmOverlay").delClass(STATES["confirmOn"]);
                resolve(G_CONFIRM);
                G_CONFIRM = -1;
            }
        }
        check();
    });
}

document.on("keydown", (e) => {
    if (e.keyCode == 27) get("#confirmOverlay").delClass(STATES["confirmOn"]);
});

// BUTTON ONCLICK FUNCTIONS //

get("#repoSelectInput").on("keydown", (e) => {
    if (e.keyCode === 13) {
        get("#repoSelectButton").click();
        return;
    }

    let value = e.target.value;
    if (value !== G_REPO_VALUE) {
        get("#repoSelectError").innerText = ""; // Delete error text.
        get("#repoSelectInput").delClass(STATES["error"]); // Remove error class.
        get("#repoInfo").delClass(STATES["repoSelected"]); // Remove repoSelect class.
        setRepoActions(false); // Set actions to default.
        get(".feature").forEach((feature) => feature.delClass(STATES["featureOn"]));
        G_REPO_VALUE = value;
    }
});

get("#repoSelectButton").on("click", tryAuth(doLoading(selectRepo)));
async function selectRepo(e) {
    const input = get("#repoSelectInput");
    let repo = input.value.trim();
    input.value = repo;

    if (repo === "") {
        setRepoError("Field cannot be empty.", true);
        return;
    }

    await jfetch("/api/repo/" + repo, "GET")
    .then((json) => {
        setRepoError("OK", false);
        setRepoActions(json["exists"]);

        if (json["exists"]) {
            json["features"].forEach((feature) => {
                get(`.feature[data-tag=${feature}]`).addClass(STATES["featureOn"]);
            });
        }

        get("#repoLinkInput").value = CONFIG["redirect_uri"] + repo;
        get("#repoInfo").addClass(STATES["repoSelected"]);

    })
    .catch(getErr((err) => {
        console.log(err);
        setRepoError("Unable to find repository or you have insufficient permissions.", true);
    }));
}

get("#repoCreate").on("click", tryAuth(doLoading(createRepo)));
async function createRepo(e) {
    const input = get("#repoSelectInput");
    await jfetch("/api/repo/" + input.value, "POST")
    .then((json) => {
        setRepoActions(true);
    })
    .catch(getErr((err) => {
        console.log(err);
        alert("An unexpected error occurred! Check console for more details.");
    }));
}

get("#repoDelete").on("click", tryAuth(doLoading(deleteRepo)));
async function deleteRepo(e) {
    const input = get("#repoSelectInput");
    if (!(await getConfirm())) return;
    await jfetch("/api/repo/" + input.value, "DELETE")
    .then((json) => {
        setRepoActions(false);
    })
    .catch(getErr((err) => {
        console.log(err);
        alert("An unexpected error occurred! Check console for more details.");
    }));
}

get("#repoSecret").on("click", tryAuth(doLoading(regenSecret)));
async function regenSecret(e) {
    const input = get("#repoSelectInput");
    await jfetch("/api/repo/" + input.value, "PATCH", { secret: true, feature: "" })
    .then((json) => {
        setRepoActions(true);
    })
    .catch(getErr((err) => {
        console.log(err);
        alert("An unexpected error occurred! Check console for more details.");
    }));
}

get("#repoLinkButton").on("click", async (e) => {
    const input = get("#repoLinkInput");
    input.select();
    input.setSelectionRange(0, 99999);
    navigator.clipboard.writeText(input.value);
});

get(".feature").forEach((el) => el.on("click", tryAuth(doLoading(toggleFeature))));
async function toggleFeature(e) {
    const input = get("#repoSelectInput");
    let attr = e.target.getAttribute("data-tag");
    if (e.target.hasClass(STATES["featureOn"]) && !(await getConfirm())) return;
    await jfetch("/api/repo/" + input.value, "PATCH", { secret: false, feature: attr })
    .then((json) => {
        e.target.setClass(STATES["featureOn"]);
    })
    .catch(getErr((err) => {
        console.log(err);
        alert("An unexpected error occurred! Check console for more details.");
    }));
}

get("#confirmInput").on("keydown", function(e) {
    if (e.keyCode === 13) {
        get("#confirmButtonYes").click();
        return;
    }

    if (e.keyCode === 27) {
        get("#confirmButtonNo").click();
        return;
    }

    let value = e.target.value;
    if (value !== G_CONFIRM_VALUE) {
        get("#confirmInput").delClass(STATES["error"]);
        G_REPO_VALUE = value;
    }
});

get("#confirmButtonNo").on("click", (e) => {
    G_CONFIRM = false;
    get("#confirmInput").value = "";
});

get("#confirmButtonYes").on("click", (e) => {
    let confirmValue = get("#confirmInput").value.trim();
    let repoValue = get("#repoSelectInput").value;

    if (confirmValue === repoValue) {
        G_CONFIRM = true;
        get("#confirmInput").value = "";
    } else {
        get("#confirmInput").addClass(STATES["error"]);
    }
});

async function init() {
    // Get query and delete URL parameters.
    if(G_QUERY.error) alert("Error returned from authorization server: "+q.error); // Check for auth errors.
    if(G_QUERY.code) {
        await getToken();
        G_AUTH = true;
        window.history.replaceState({}, document.title, window.location.pathname);
    }
    get("body").setClass(STATES["auth"], G_AUTH);
}

var G_QUERY = parseQueryString(window.location.search.substring(1));
init();