"use client";

import { create } from "zustand";
import { persist } from "zustand/middleware";
import type { SelectedLocation } from "@/types/location";
import type { Province } from "@/types/province";
import type { DistanceUnit, PrecipitationUnit, PressureUnit, TemperatureUnit, WindSpeedUnit } from "@/types/units";
import {
  DEFAULT_APP_SECTION_VISIBILITY,
  normalizeAppSectionVisibility,
  type AppSectionId,
  type AppSectionVisibility,
} from "@/lib/app-sections";
import {
  DEFAULT_DASHBOARD_SECTION_VISIBILITY,
  normalizeDashboardSectionVisibility,
  type DashboardSectionId,
  type DashboardSectionVisibility,
} from "@/lib/dashboard-sections";
import {
  DEFAULT_DISTANCE_UNIT,
  DEFAULT_PRECIPITATION_UNIT,
  DEFAULT_PRESSURE_UNIT,
  DEFAULT_TEMPERATURE_UNIT,
  DEFAULT_WIND_SPEED_UNIT,
  isDistanceUnit,
  isPrecipitationUnit,
  isPressureUnit,
  isTemperatureUnit,
  isWindSpeedUnit,
} from "@/lib/weather-utils";
import type { WeatherRegion } from "@/types/weather-region";
import { getWeatherRegionForCountryCode } from "@/types/weather-region";

type NotificationProvinceMode = "selected" | "manual";

interface WeatherStore {
  favorites: string[];
  selectedStationId: string | null;
  selectedLocation: SelectedLocation | null;
  warningNotificationsEnabled: boolean;
  morningBriefNotificationsEnabled: boolean;
  tomorrowBriefNotificationsEnabled: boolean;
  warningNotificationProvinceMode: NotificationProvinceMode;
  warningNotificationProvince: Province | null;
  temperatureUnit: TemperatureUnit;
  windSpeedUnit: WindSpeedUnit;
  precipitationUnit: PrecipitationUnit;
  pressureUnit: PressureUnit;
  distanceUnit: DistanceUnit;
  dashboardSections: DashboardSectionVisibility;
  appSections: AppSectionVisibility;
  toggleFavorite: (id: string) => void;
  selectStation: (id: string) => void;
  selectLocation: (location: SelectedLocation) => void;
  setWarningNotificationsEnabled: (enabled: boolean) => void;
  setMorningBriefNotificationsEnabled: (enabled: boolean) => void;
  setTomorrowBriefNotificationsEnabled: (enabled: boolean) => void;
  setWarningNotificationProvinceMode: (mode: NotificationProvinceMode) => void;
  setWarningNotificationProvince: (province: Province | null) => void;
  setTemperatureUnit: (unit: TemperatureUnit) => void;
  setWindSpeedUnit: (unit: WindSpeedUnit) => void;
  setPrecipitationUnit: (unit: PrecipitationUnit) => void;
  setPressureUnit: (unit: PressureUnit) => void;
  setDistanceUnit: (unit: DistanceUnit) => void;
  setDashboardSectionVisible: (section: DashboardSectionId, visible: boolean) => void;
  setAppSectionVisible: (section: AppSectionId, visible: boolean) => void;
}

export const useWeatherStore = create<WeatherStore>()(
  persist(
    (set) => ({
      favorites: [],
      selectedStationId: null,
      selectedLocation: null,
      warningNotificationsEnabled: false,
      morningBriefNotificationsEnabled: false,
      tomorrowBriefNotificationsEnabled: false,
      warningNotificationProvinceMode: "selected",
      warningNotificationProvince: null,
      temperatureUnit: DEFAULT_TEMPERATURE_UNIT,
      windSpeedUnit: DEFAULT_WIND_SPEED_UNIT,
      precipitationUnit: DEFAULT_PRECIPITATION_UNIT,
      pressureUnit: DEFAULT_PRESSURE_UNIT,
      distanceUnit: DEFAULT_DISTANCE_UNIT,
      dashboardSections: DEFAULT_DASHBOARD_SECTION_VISIBILITY,
      appSections: DEFAULT_APP_SECTION_VISIBILITY,
      toggleFavorite: (id) =>
        set((state) => ({
          favorites: state.favorites.includes(id)
            ? state.favorites.filter((favoriteId) => favoriteId !== id)
            : [...state.favorites, id],
        })),
      selectStation: (id) => set({ selectedStationId: id, selectedLocation: null }),
      selectLocation: (location) => set({ selectedStationId: location.stationId, selectedLocation: location }),
      setWarningNotificationsEnabled: (enabled) => set({ warningNotificationsEnabled: enabled }),
      setMorningBriefNotificationsEnabled: (enabled) => set({ morningBriefNotificationsEnabled: enabled }),
      setTomorrowBriefNotificationsEnabled: (enabled) => set({ tomorrowBriefNotificationsEnabled: enabled }),
      setWarningNotificationProvinceMode: (mode) => set({ warningNotificationProvinceMode: mode }),
      setWarningNotificationProvince: (province) => set({ warningNotificationProvince: province }),
      setTemperatureUnit: (unit) => set({ temperatureUnit: unit }),
      setWindSpeedUnit: (unit) => set({ windSpeedUnit: unit }),
      setPrecipitationUnit: (unit) => set({ precipitationUnit: unit }),
      setPressureUnit: (unit) => set({ pressureUnit: unit }),
      setDistanceUnit: (unit) => set({ distanceUnit: unit }),
      setDashboardSectionVisible: (section, visible) =>
        set((state) => ({
          dashboardSections: { ...state.dashboardSections, [section]: visible },
        })),
      setAppSectionVisible: (section, visible) =>
        set((state) => ({
          appSections: { ...state.appSections, [section]: visible },
        })),
    }),
    {
      name: "wtr:preferences",
      migrate: (persisted) => {
        const state = persisted as Partial<WeatherStore> | undefined;
        const location = state?.selectedLocation as
          | (Partial<SelectedLocation> & { region?: WeatherRegion })
          | null
          | undefined;
        if (!state) return persisted;
        const dashboardSections = normalizeDashboardSectionVisibility(state.dashboardSections);
        const appSections = normalizeAppSectionVisibility(state.appSections);
        const unitPreferences = {
          temperatureUnit: isTemperatureUnit(state.temperatureUnit) ? state.temperatureUnit : DEFAULT_TEMPERATURE_UNIT,
          windSpeedUnit: isWindSpeedUnit(state.windSpeedUnit) ? state.windSpeedUnit : DEFAULT_WIND_SPEED_UNIT,
          precipitationUnit: isPrecipitationUnit(state.precipitationUnit)
            ? state.precipitationUnit
            : DEFAULT_PRECIPITATION_UNIT,
          pressureUnit: isPressureUnit(state.pressureUnit) ? state.pressureUnit : DEFAULT_PRESSURE_UNIT,
          distanceUnit: isDistanceUnit(state.distanceUnit) ? state.distanceUnit : DEFAULT_DISTANCE_UNIT,
        };
        if (!location) return { ...state, ...unitPreferences, dashboardSections, appSections };
        const countryCode = location.countryCode ?? (location.province ? "PL" : null);
        const region = location.region ?? getWeatherRegionForCountryCode(countryCode);
        return {
          ...state,
          ...unitPreferences,
          dashboardSections,
          appSections,
          selectedLocation: {
            ...location,
            country: location.country ?? (countryCode === "PL" ? "Polska" : null),
            countryCode,
            admin1: location.admin1 ?? location.province ?? null,
            admin2: location.admin2 ?? location.district ?? null,
            timezone: location.timezone ?? (countryCode === "PL" ? "Europe/Warsaw" : null),
            region,
            stationId: location.stationId ?? null,
            stationName: location.stationName ?? null,
            distanceKm: location.distanceKm ?? null,
          },
        };
      },
    },
  ),
);