import {Href, Stack, useRouter} from "expo-router";
import {StyleSheet, Text, View, ColorValue, ListRenderItemInfo, TouchableOpacity, Platform, Modal} from "react-native";
import {RowMap, SwipeListView} from "react-native-swipe-list-view";
import {ChevronDown, Plus} from "lucide-react-native";
import {useEffect, useState} from "react";
import {MenuAction, MenuView, NativeActionEvent} from "@react-native-menu/menu";
import {SQLiteDatabase, SQLiteProvider, useSQLiteContext} from "expo-sqlite";
import CreateComputer from "@/app/createComputer";

export const iOS_HIGHLIGHT = "#007AFF";

export async function migrateDbIfNeeded(db: SQLiteDatabase) {
  await db.execAsync(`
    PRAGMA journal_mode = WAL;
    CREATE TABLE IF NOT EXISTS servers (key INTEGER PRIMARY KEY NOT NULL, name TEXT NOT NULL, domain TEXT NOT NULL);
    CREATE TABLE IF NOT EXISTS computers (key INTEGER PRIMARY KEY NOT NULL, server_key INTEGER NOT NULL, name, emoji, background_color, mac_address TEXT NOT NULL);
  `);
}

export default function Index() {
  const [ currentServerName, setCurrentServerName ] = useState<string>("None");
  const [ servers, setServers ] = useState<Server[]>([]);
  const [ computers, setComputers ] = useState<Computer[]>([]);

  return (
    <View>
      <SQLiteProvider databaseName="selfstarter.db" onInit={migrateDbIfNeeded}>
        <Header servers={servers} setServers={setServers} currentServerName={currentServerName} setCurrentServerName={setCurrentServerName} />
        <ComputerList computers={computers} setComputers={setComputers}/>
      </SQLiteProvider>
    </View>
  );
}

function Header(props: { servers: Server[], setServers: (value: (((prevState: Server[]) => Server[]) | Server[])) => void, currentServerName: string, setCurrentServerName: (value: (((prevState: string) => string) | string)) => void }) {
  const db = useSQLiteContext();

  useEffect(() => {
    async function setup() {
      const result = await db.getFirstAsync<Server>(`SELECT * FROM servers`);
      props.setCurrentServerName(result?.name || "None");
    }

    if (props.currentServerName === "None") {
      setup();
    }
  }, []);

  useEffect(() => {
    async function setup() {
      const result = await db.getAllAsync<Server>(`SELECT * FROM servers`);
      props.setServers(result);
    }
    setup();
  }, []);

  const [ menuEvent, setMenuEvent ] = useState("");
  const router = useRouter();
  useEffect(() => {
    if (menuEvent === "addComputer") {
      router.navigate('/createComputer');
    } else if (menuEvent === "addServer") {
      router.navigate('/createServer');
    }
    setMenuEvent("");
  }, [menuEvent]);

  const selectActions: MenuAction[] = [];
  for (const server of props.servers) {
    if (server.name !== props.currentServerName) {
      selectActions.push({
        id: server.domain,
        title: server.name,
        titleColor: '#000000',
        imageColor: '#000000',
      })
    }
  }
  selectActions.push({
    id: 'deleteServer',
    title: 'Delete Current Server',
    attributes: {
      destructive: true,
    },
    image: Platform.select({
      ios: 'trash',
      android: 'ic_menu_delete',
    }),
    imageColor: "red",
  })


  const handleServerSelect = ({nativeEvent}: NativeActionEvent) => {
    const newName = props.servers.find((server) =>  {
      return server.name === nativeEvent.event;
    })
    props.setCurrentServerName(newName?.name ?? "None");
  };

  const addActions: MenuAction[] = [
    {
      id: 'addServer',
      title: 'Add WoL Server',
      titleColor: '#000000',
      image: 'globe',
      imageColor: '#000000',
    }
  ];
  if (props.currentServerName !== "None") {
    addActions.push({
      id: 'addComputer',
      title: 'Add Computer',
      titleColor: '#000000',
      image: 'desktopcomputer',
      imageColor: '#000000',
    });
  }

  return <Stack.Screen
    options={{
      title: 'Home',
      headerTintColor: '#fff',
      headerTitleStyle: {
        fontWeight: 'bold',
      },
      headerTitle: _ =>
        <View style={{
          display: "flex",
          flexDirection: "row",
          gap: 10,
        }}>
          <Text style={{
            fontSize: 20,
            fontWeight: 'bold',
          }}>{props.currentServerName}</Text>
          {props.servers.length > 0 &&
            <View style={{
            backgroundColor: iOS_HIGHLIGHT,
            borderRadius: 100,
          }}>
              <MenuView onPressAction={handleServerSelect} actions={selectActions}>
                <ChevronDown color={"#FFFFFF"}/>
              </MenuView>
            </View>
          }
        </View>,
      headerRight: props =>
        <View>
          <MenuView
            onPressAction={({nativeEvent}) => { setMenuEvent(nativeEvent.event); }}
            actions={addActions}
            shouldOpenOnLongPress={false}
          >
            <Plus color={iOS_HIGHLIGHT}/>
          </MenuView>
        </View>
    }}
  />
}

const styles = StyleSheet.create({
  computerElement: {
    display: "flex",
    flexDirection: "row",
    paddingHorizontal: 24,
    paddingVertical: 14,
    gap: 32,
    backgroundColor: '#FFFFFF'
  },
  computerName: {
    fontSize: 18,
    justifyContent: "flex-start",
  },
  computerSubtitle: {
    fontSize: 12,
    justifyContent: "flex-start",
    color: '#979797'
  },
  backTextWhite: {
    color: '#FFF',
  },
  rowBack: {
    alignItems: 'center',
    backgroundColor: '#DDD',
    flex: 1,
    flexDirection: 'row',
    justifyContent: 'space-between',
    paddingLeft: 15,
  },
  backRightBtn: {
    alignItems: 'center',
    bottom: 0,
    justifyContent: 'center',
    position: 'absolute',
    top: 0,
    width: 75,
  },
  backRightBtnRight: {
    backgroundColor: 'red',
    right: 0,
  },
});

function ComputerList(props: {computers: Computer[], setComputers: (value: (((prevState: Computer[]) => Computer[]) | Computer[])) => void }) {
  const db = useSQLiteContext();

  useEffect(() => {
    async function setup() {
      const result = await db.getAllAsync<Computer>(`SELECT * FROM computers`);
      props.setComputers(result);
    }
    setup();
  }, []);

  const renderHiddenItem = (data: ListRenderItemInfo<Computer>, rowMap: RowMap<Computer>) => (
    <View style={styles.rowBack}>
      <TouchableOpacity
        style={[styles.backRightBtn, styles.backRightBtnRight]}
        onPress={() => {
          //TODO: remove it from storage
        }}>
        <Text style={styles.backTextWhite}>Delete</Text>
      </TouchableOpacity>
    </View>
  );

  return (
    <SwipeListView
      data={props.computers}
      renderItem={({item}: ListRenderItemInfo<Computer>) =>
        <View style={styles.computerElement}>
          <View style={{
            width: 65,
            height: 65,
            borderRadius: 100,
            backgroundColor: item.background_color,
            alignItems: "center",
            justifyContent: "center",
          }}> //TODO: Make Button
            <Text style={{
              fontSize: 28
            }}>{item.emoji}</Text>
          </View>
          <View style={{
            flexDirection: "column",
            gap: 3,
            padding: 0,
            justifyContent: "center",
          }}>
            <Text style={styles.computerName}>{item.name}</Text>
            <Text style={styles.computerSubtitle}>{item.mac_address}</Text>
          </View>
        </View>
      } rightOpenValue={-75} renderHiddenItem={renderHiddenItem}
    />
  )
}

type Server = {
  key: number,
  name: string,
  domain: string,
}

type Computer = {
  key: number,
  server_key: number,
  name: string,
  emoji: string,
  background_color: ColorValue,
  mac_address: string,
}