import { api } from "./api.js";
import { t } from "./i18n.js";
import { state, clearUserState, setSavedUsername } from "./state.js";
import { $, toast } from "./dom.js";
import {
    handleAuthError,
    openNewSuggestionModal,
    setAuthMode,
    setAuthUI,
} from "./ui.js";

function setupConsentRows() {
    const hasConsent = () =>
        document.cookie
            .split(";")
            .some((c) => c.trim().startsWith("cookie_consent=1"));
    const setConsent = () => {
        document.cookie =
            "cookie_consent=1; path=/; max-age=31536000; SameSite=Lax";
    };
    const consentRows = document.querySelectorAll(".consent-row");
    const toggleConsentRows = () => {
        const hide = hasConsent();
        consentRows.forEach((row) => row.classList.toggle("hidden", hide));
    };

    toggleConsentRows();
    ["login-consent", "register-consent"].forEach((id) => {
        const box = $(id);
        if (box) {
            box.checked = hasConsent();
        }
    });

    return { hasConsent, setConsent, toggleConsentRows };
}

function setupAuthModeToggle() {
    const toggleAuth = $("auth-toggle");
    if (toggleAuth) {
        toggleAuth.addEventListener("click", (e) => {
            e.preventDefault();
            setAuthMode(state.authMode === "login" ? "register" : "login");
        });
    }
    setAuthMode(state.authMode);
}

function setupLoginUserEditingHint() {
    const loginUser = $("login-username");
    if (!loginUser) return;

    const markEditing = () => {
        loginUser.dataset.userEditing = "1";
    };
    ["focus", "input", "keydown"].forEach((evt) =>
        loginUser.addEventListener(evt, markEditing),
    );
    loginUser.addEventListener("blur", () => {
        delete loginUser.dataset.userEditing;
    });
}

function setupLoginFormHandlers({
    hasConsent,
    setConsent,
    toggleConsentRows,
    runSerializedRefresh,
}) {
    const loginForm = $("login-form");
    if (!loginForm) return;

    loginForm.addEventListener("submit", async (e) => {
        e.preventDefault();
        const username = $("login-username").value.trim();
        const password = $("login-password").value;
        if (!username || !password)
            return toast(t("auth.needCredentials"), true);
        if (!hasConsent() && !$("login-consent")?.checked)
            return toast(t("auth.cookieRequired"), true);
        try {
            await api.login({ username, password });
            setConsent();
            toggleConsentRows();
            setSavedUsername(username);
            state.isAuthenticated = true;
            setAuthUI(true);
            await runSerializedRefresh();
            toast(t("toast.loggedIn"));
        } catch (err) {
            if (err?.status === 401)
                return toast(t("auth.invalidCredentials"), true);
            if (handleAuthError(err, clearUserState)) return;
        }
    });
}

function setupRegisterFormHandlers({
    hasConsent,
    setConsent,
    toggleConsentRows,
    runSerializedRefresh,
}) {
    const registerForm = $("register-form");
    if (!registerForm) return;

    registerForm.addEventListener("submit", async (e) => {
        e.preventDefault();
        const username = $("register-username").value.trim();
        const password = $("register-password").value;
        const displayName = $("register-displayName").value.trim();
        const adminKey = $("register-adminkey").value.trim();
        if (!displayName)
            return toast(
                t("toast.displayNameRequired") || "Display name is required.",
                true,
            );
        if (!username || !password)
            return toast(t("auth.needCredentials"), true);
        if (!hasConsent() && !$("register-consent")?.checked)
            return toast(t("auth.cookieRequired"), true);
        try {
            await api.register({ username, password, displayName, adminKey });
            setConsent();
            toggleConsentRows();
            setSavedUsername(username);
            state.isAuthenticated = true;
            setAuthUI(true);
            await runSerializedRefresh();
            toast(t("toast.registered"));
        } catch (err) {
            if (handleAuthError(err, clearUserState)) return;
            toast(err.message, true);
        }
    });
}

function setupLogoutHandler() {
    const logoutBtn = $("logout");
    if (!logoutBtn) return;

    logoutBtn.addEventListener("click", async (e) => {
        e.preventDefault();
        try {
            await api.logout();
        } catch (err) {
            toast(err.message, true);
        }
        document.querySelectorAll(".auth-form").forEach((form) => form.reset());
        setAuthMode("login");
        setSavedUsername("");
        clearUserState();
        state.isAuthenticated = false;
        setAuthUI(false);
    });
}

function setupSuggestionEntryButtons() {
    const openSuggestBtn = $("open-suggest-modal");
    if (openSuggestBtn) {
        openSuggestBtn.addEventListener("click", (e) => {
            e.preventDefault();
            if (openSuggestBtn.disabled) return;
            if (state.phase !== "Suggest") return;
            openNewSuggestionModal();
        });
    }

    const openJokerBtn = $("open-joker-modal");
    if (openJokerBtn) {
        openJokerBtn.addEventListener("click", (e) => {
            e.preventDefault();
            if (state.phase !== "Vote" || !state.hasJoker) return;
            openNewSuggestionModal();
        });
    }
}

export function setupAuthHandlers({ runSerializedRefresh }) {
    setupAuthModeToggle();
    const consent = setupConsentRows();
    setupLoginUserEditingHint();
    setupLoginFormHandlers({ ...consent, runSerializedRefresh });
    setupRegisterFormHandlers({ ...consent, runSerializedRefresh });
    setupSuggestionEntryButtons();
    setupLogoutHandler();
}