"use client";

import { useEffect } from "react";
import Location from "@components/Location/Location";
import { useLocationStore } from "@store/Location.Store";
import { useNotificationPreferencesStore } from "@store/NotificationPreferences.Store";
import { useSessionStore } from "@store/Sesion.Store";
import { useEventHandlerStore, EVENT_TYPES } from "@store/EventHandler.Store";
import { useAlert } from "@store/Alert.Store";
import { getClientPreferences, upsertClientPreferences } from "@services/Notifications.Service";
import { NotificationChannel } from "@models/NotificationPreferences.model";
import AccountCircleOutlinedIcon from "@mui/icons-material/AccountCircleOutlined";
import NotificationsIcon from "@mui/icons-material/NotificationsOutlined";
import MaterialAlert from "@mui/material/Alert";
import styles from "./NotificationsPreferencesPage.module.css";

const CHANNELS: { key: NotificationChannel; label: string }[] = [
    { key: "whatsapp", label: "WhatsApp" },
    { key: "email", label: "Email" },
    { key: "system", label: "Sistema" }
];

type ChannelPreference = "default" | "preferred" | "muted";

export default function NotificationsPreferencesPage() {
    const location = useLocationStore();
    const store = useNotificationPreferencesStore();
    const SessionInfo = useSessionStore();
    const eventHandler = useEventHandlerStore();
    const alert = useAlert();

    useEffect(() => {
        location.clear();

        location.add({
            url: "/user/profile",
            title: "Perfil de usuario",
            icon: <AccountCircleOutlinedIcon sx={{ fontSize: "32px", mr: "10px" }} />
        });

        location.add({
            url: "",
            title: "Preferencias de notificación",
            icon: <NotificationsIcon sx={{ fontSize: "32px", mr: "10px" }} />
        });
    }, []);

    useEffect(() => {
        if (!SessionInfo.userId) {
            return;
        }

        store.setClientId(SessionInfo.userId);
        store.setMode("client-preferences");

        eventHandler.setEventType(EVENT_TYPES.LOADING);
        getClientPreferences(SessionInfo.userId, SessionInfo.userId)
            .then((preferences) => {
                store.setClientPreferences(preferences);
                store.updateFormData({
                    preferredChannels: preferences.preferredChannels || [],
                    mutedChannels: preferences.mutedChannels || []
                });
                store.setDirty(false);
            })
            .catch((error) => {
                alert.showError(error.format());
            })
            .finally(() => {
                eventHandler.setEventType(EVENT_TYPES.SLEEP);
            });
    }, [SessionInfo.userId]);

    const getChannelPreference = (channel: NotificationChannel): ChannelPreference => {
        if (store.formData.mutedChannels.includes(channel)) {
            return "muted";
        }

        if (store.formData.preferredChannels.includes(channel)) {
            return "preferred";
        }

        return "default";
    };

    const selectPreference = (channel: NotificationChannel, preference: ChannelPreference) => {
        store.updateFormData({
            preferredChannels:
                preference === "preferred"
                    ? [...store.formData.preferredChannels.filter((c) => c !== channel), channel]
                    : store.formData.preferredChannels.filter((c) => c !== channel),
            mutedChannels:
                preference === "muted"
                    ? [...store.formData.mutedChannels.filter((c) => c !== channel), channel]
                    : store.formData.mutedChannels.filter((c) => c !== channel)
        });
        eventHandler.setEventType(EVENT_TYPES.NEED_SAVE);
    };

    const handleSave = () => {
        eventHandler.setEventType(EVENT_TYPES.LOADING);
        upsertClientPreferences(SessionInfo.userId, SessionInfo.userId, {
            preferredChannels: store.formData.preferredChannels as NotificationChannel[],
            mutedChannels: store.formData.mutedChannels as NotificationChannel[]
        })
            .then((preferences) => {
                store.setClientPreferences(preferences);
                store.setDirty(false);
            })
            .catch((error) => {
                alert.showError(error.format());
            })
            .finally(() => {
                eventHandler.setEventType(EVENT_TYPES.SLEEP);
            });
    };

    useEffect(() => {
        if (eventHandler.eventType === EVENT_TYPES.SAVE) {
            handleSave();
        }
    }, [eventHandler.eventType]);

    return (
        <>
            <Location />

            <div className={styles.container}>
                <MaterialAlert severity="info" sx={{ marginBottom: "0" }}>
                    <b>Preferencias globales:</b> Configure cómo prefiere recibir notificaciones. Si deja un canal en estándar, cada organización podrá usar su configuración general.
                </MaterialAlert>

                <div className={styles.channels}>
                    {CHANNELS.map((channel) => {
                        const selectedPreference = getChannelPreference(channel.key);
                        return (
                            <div key={channel.key} className={styles.card}>
                                <div>
                                    <div className={styles.channelTitle}>{channel.label}</div>
                                    <div className={styles.channelDescription}>
                                        {selectedPreference === "preferred" && "Priorizar este canal para tus notificaciones."}
                                        {selectedPreference === "muted" && "No recibir notificaciones por este canal."}
                                        {selectedPreference === "default" && "Usar la configuración estándar de cada organización."}
                                    </div>
                                </div>

                                <div className={styles.options}>
                                    {[
                                        { key: "default" as ChannelPreference, label: "Estándar" },
                                        { key: "preferred" as ChannelPreference, label: "Preferido" },
                                        { key: "muted" as ChannelPreference, label: "Silenciado" }
                                    ].map((option) => {
                                        const isSelected = selectedPreference === option.key;
                                        return (
                                            <button
                                                key={option.key}
                                                type="button"
                                                onClick={() => selectPreference(channel.key, option.key)}
                                                className={`${styles.optionButton} ${isSelected ? styles.optionButtonActive : ""}`}
                                            >
                                                {option.label}
                                            </button>
                                        );
                                    })}
                                </div>
                            </div>
                        );
                    })}
                </div>

                {store.isDirty && (
                    <button onClick={handleSave} className={styles.saveButton}>
                        Guardar preferencias
                    </button>
                )}
            </div>

            <div style={{ marginBottom: "40px" }}>&nbsp;</div>
        </>
    );
}