import { NavigationProp, useNavigation } from "@react-navigation/native";
import { format } from "date-fns";
import { useCallback, useEffect, useMemo, useState } from "react";
import { useForm } from "react-hook-form";
import { NativeModules, ScrollView, View } from "react-native";
import DocumentPicker from "react-native-document-picker";
import { Dirs, FileSystem } from "react-native-file-access";
import ConfirmDialog from "./ConfirmDialog";
import { MARGIN } from "./constants";
import { AppDataSource } from "./data-source";
import { setRepo, settingsRepo } from "./db";
import { DrawerParams } from "./drawer-param-list";
import DrawerHeader from "./DrawerHeader";
import Input from "./input";
import { darkOptions, lightOptions, themeOptions } from "./options";
import Page from "./Page";
import Select from "./Select";
import SettingButton from "./SettingButton";
import Settings, { settingsUpdated } from "./settings";
import Switch from "./Switch";
import { toast } from "./toast";
import { useTheme } from "./use-theme";

const twelveHours = [
  "dd/LL/yyyy",
  "dd/LL/yyyy, p",
  "ccc p",
  "p",
  "yyyy-MM-d",
  "yyyy-MM-d, p",
  "yyyy.MM.d",
];
const twentyFours = [
  "dd/LL/yyyy",
  "dd/LL/yyyy, k:m",
  "ccc k:m",
  "k:m",
  "yyyy-MM-d",
  "yyyy-MM-d, k:m",
  "yyyy.MM.d",
];

export default function SettingsPage() {
  const [ignoring, setIgnoring] = useState(false);
  const [term, setTerm] = useState("");
  const [formatOptions, setFormatOptions] = useState<string[]>(twelveHours);
  const [importing, setImporting] = useState(false);
  const [deleting, setDeleting] = useState(false);
  const { reset } = useNavigation<NavigationProp<DrawerParams>>();

  const { watch, setValue } = useForm<Settings>({
    defaultValues: () => settingsRepo.findOne({ where: {} }),
  });
  const settings = watch();

  const {
    theme,
    setTheme,
    lightColor,
    setLightColor,
    darkColor,
    setDarkColor,
  } = useTheme();

  useEffect(() => {
    NativeModules.SettingsModule.ignoringBattery(setIgnoring);
    NativeModules.SettingsModule.is24().then((is24: boolean) => {
      console.log(`${SettingsPage.name}.focus:`, { is24 });
      if (is24) setFormatOptions(twentyFours);
      else setFormatOptions(twelveHours);
    });
  }, []);

  const update = useCallback(async (key: keyof Settings, value: unknown) => {
    await settingsRepo
      .createQueryBuilder()
      .update()
      .set({ [key]: value })
      .printSql()
      .execute();
    settingsUpdated();
  }, []);

  const soundString = useMemo(() => {
    if (!settings.sound) return null;
    const split = settings.sound.split("/");
    return split.pop();
  }, [settings.sound]);

  const changeSound = useCallback(async () => {
    const { fileCopyUri } = await DocumentPicker.pickSingle({
      type: DocumentPicker.types.audio,
      copyTo: "documentDirectory",
    });
    if (!fileCopyUri) return;
    setValue("sound", fileCopyUri);
    await update("sound", fileCopyUri);
    toast("Sound will play after rest timers.");
  }, [setValue, update]);

  const switches: Input<boolean>[] = useMemo(
    () => [
      { name: "Rest timers", value: settings.alarm, key: "alarm" },
      { name: "Vibrate", value: settings.vibrate, key: "vibrate" },
      { name: "Disable sound", value: settings.noSound, key: "noSound" },
      { name: "Notifications", value: settings.notify, key: "notify" },
      { name: "Show images", value: settings.images, key: "images" },
      { name: "Show unit", value: settings.showUnit, key: "showUnit" },
      { name: "Show steps", value: settings.steps, key: "steps" },
      { name: "Show date", value: settings.showDate, key: "showDate" },
      { name: "Automatic backup", value: settings.backup, key: "backup" },
    ],
    [settings]
  );

  const filter = useCallback(
    ({ name }) => name.toLowerCase().includes(term.toLowerCase()),
    [term]
  );

  const changeBoolean = useCallback(
    async (key: keyof Settings, value: boolean) => {
      setValue(key, value);
      await update(key, value);
      switch (key) {
        case "alarm":
          if (value) toast("Timers will now run after each set.");
          else toast("Stopped timers running after each set.");
          if (value && !ignoring) NativeModules.SettingsModule.ignoreBattery();
          return;
        case "vibrate":
          if (value) toast("Alarms will now vibrate.");
          else toast("Alarms will no longer vibrate.");
          return;
        case "notify":
          if (value) toast("Show notifications for new records.");
          else toast("Stopped notifications for new records.");
          return;
        case "images":
          if (value) toast("Show images for sets.");
          else toast("Hid images for sets.");
          return;
        case "showUnit":
          if (value) toast("Show option to select unit for sets.");
          else toast("Hid unit option for sets.");
          return;
        case "steps":
          if (value) toast("Show steps for a workout.");
          else toast("Hid steps for workouts.");
          return;
        case "showDate":
          if (value) toast("Show date for sets.");
          else toast("Hid date on sets.");
          return;
        case "noSound":
          if (value) toast("Alarms will no longer make a sound.");
          else toast("Enabled sound for alarms.");
          return;
        case "backup":
          if (value) {
            const result = await DocumentPicker.pickDirectory();
            toast("Backup database daily.");
            NativeModules.BackupModule.start(result.uri);
          } else {
            toast("Stopped backing up daily");
            NativeModules.BackupModule.stop();
          }
          return;
      }
    },
    [ignoring, setValue, update]
  );

  const renderSwitch = useCallback(
    (item: Input<boolean>) => (
      <Switch
        key={item.name}
        value={item.value}
        onChange={(value) => changeBoolean(item.key, value)}
        title={item.name}
      />
    ),
    [changeBoolean]
  );

  const switchesMarkup = useMemo(
    () => switches.filter(filter).map((s) => renderSwitch(s)),
    [filter, switches, renderSwitch]
  );

  const changeString = useCallback(
    async (key: keyof Settings, value: string) => {
      setValue(key, value);
      await update(key, value);
      switch (key) {
        case "date":
          return toast("Changed date format");
        case "darkColor":
          setDarkColor(value);
          return toast("Set primary color for dark mode.");
        case "lightColor":
          setLightColor(value);
          return toast("Set primary color for light mode.");
        case "vibrate":
          return toast("Set primary color for light mode.");
        case "sound":
          return toast("Sound will play after rest timers.");
        case "theme":
          setTheme(value as string);
          if (value === "dark") toast("Theme will always be dark.");
          else if (value === "light") toast("Theme will always be light.");
          else if (value === "system") toast("Theme will follow system.");
          return;
      }
    },
    [update, setTheme, setDarkColor, setLightColor, setValue]
  );

  const selects: Input<string>[] = useMemo(() => {
    const today = new Date();
    return [
      { name: "Theme", value: theme, items: themeOptions, key: "theme" },
      {
        name: "Dark color",
        value: darkColor,
        items: lightOptions,
        key: "darkColor",
      },
      {
        name: "Light color",
        value: lightColor,
        items: darkOptions,
        key: "lightColor",
      },
      {
        name: "Date format",
        value: settings.date,
        items: formatOptions.map((option) => ({
          label: format(today, option),
          value: option,
        })),
        key: "date",
      },
    ];
  }, [settings, darkColor, formatOptions, theme, lightColor]);

  const renderSelect = useCallback(
    (input: Input<string>) => (
      <Select
        key={input.name}
        value={input.value}
        onChange={(value) => changeString(input.key, value)}
        label={input.name}
        items={input.items}
      />
    ),
    [changeString]
  );

  const selectsMarkup = useMemo(
    () => selects.filter(filter).map(renderSelect),
    [filter, selects, renderSelect]
  );

  const confirmDelete = useCallback(async () => {
    setDeleting(false);
    await AppDataSource.dropDatabase();
    await AppDataSource.destroy();
    await AppDataSource.initialize();
    toast("Database deleted.");
  }, []);

  const confirmImport = useCallback(async () => {
    setImporting(false);
    await AppDataSource.destroy();
    const file = await DocumentPicker.pickSingle();
    await FileSystem.cp(file.uri, Dirs.DatabaseDir + "/massive.db");
    await AppDataSource.initialize();
    await setRepo.createQueryBuilder().update().set({ image: null }).execute();
    await update("sound", null);
    const { alarm, backup } = await settingsRepo.findOne({ where: {} });
    console.log({ backup });
    const directory = await DocumentPicker.pickDirectory();
    if (backup) NativeModules.BackupModule.start(directory.uri);
    else NativeModules.BackupModule.stop();
    NativeModules.SettingsModule.ignoringBattery((isIgnoring: boolean) => {
      if (alarm && !isIgnoring) NativeModules.SettingsModule.ignoreBattery();
      reset({ index: 0, routes: [{ name: "Settings" }] });
    });
  }, [reset, update]);

  const exportDatabase = useCallback(async () => {
    const path = Dirs.DatabaseDir + "/massive.db";
    await FileSystem.cpExternal(path, "massive.db", "downloads");
    toast("Database exported. Check downloads.");
  }, []);

  const buttons = useMemo(
    () => [
      {
        name: soundString || "Default",
        onPress: changeSound,
        label: "Alarm sound",
      },
      { name: "Export database", onPress: exportDatabase },
      { name: "Import database", onPress: () => setImporting(true) },
      { name: "Delete database", onPress: () => setDeleting(true) },
    ],
    [changeSound, exportDatabase, soundString]
  );

  const buttonsMarkup = useMemo(
    () =>
      buttons
        .filter(filter)
        .map((button) => <SettingButton {...button} key={button.name} />),
    [buttons, filter]
  );

  return (
    <>
      <DrawerHeader name="Settings" />

      <Page term={term} search={setTerm} style={{ flexGrow: 1 }}>
        <ScrollView style={{ marginTop: MARGIN, flex: 1 }}>
          {switchesMarkup}
          <View style={{ marginBottom: MARGIN }} />
          {selectsMarkup}
          {buttonsMarkup}
        </ScrollView>
      </Page>

      <ConfirmDialog
        title="Are you sure?"
        onOk={confirmImport}
        setShow={setImporting}
        show={importing}
      >
        Importing a database overwrites your current data. This action cannot be
        reversed!
      </ConfirmDialog>

      <ConfirmDialog
        title="Are you sure?"
        onOk={confirmDelete}
        setShow={setDeleting}
        show={deleting}
      >
        Deleting your database wipes your current data. This action cannot be
        reversed!
      </ConfirmDialog>
    </>
  );
}