import React, { useState, useEffect } from "react";
import { ScrollView, Text, Alert, Button } from "react-native";
import PlayerSelector from "@/components/PlayerSelector";
import BuyInSelector from "@/components/BuyInSelector";
import ChipsSelector from "@/components/ChipsSelector";
import ChipDistributionSummary from "@/components/ChipDistributionSummary";
import ChipDetection from "@/components/ChipDetection";
import { saveState, loadState } from "@/components/CalculatorState";
import { savePersistentState, loadPersistentState } from "@/components/PersistentState";

export enum COLORS {
  "white",
  "red",
  "green",
  "blue",
  "black",
}

const IndexScreen: React.FC = () => {
  const [playerCount, setPlayerCount] = useState(2);
  const [buyInAmount, setBuyInAmount] = useState<number>(20);
  const [numberOfChips, setNumberOfChips] = useState<number>(5);
  const [totalChipsCount, setTotalChipsCount] = useState<number[]>([]);

  // Load persistent data on startup
  useEffect(() => {
    const loadPersistentData = async () => {
      try {
        console.log("Loading persistent game state...");
        const savedState = await loadPersistentState();
        if (savedState) {
          console.log("Persistent state restored:", savedState);
          setPlayerCount(savedState.playerCount);
          setBuyInAmount(savedState.buyInAmount);
          setNumberOfChips(savedState.numberOfChips);
          setTotalChipsCount(savedState.totalChipsCount);
        } else {
          console.log("No persistent state found.");
        }
      } catch (error) {
        console.error("Error loading persistent state:", error);
      }
    };
    loadPersistentData();
  }, []);

  // Save game state to selected slot
  const handleSave = async (slot: "SLOT1" | "SLOT2") => {
    if (buyInAmount === null) {
      Alert.alert("Error", "Please select a valid buy-in amount");
      return;
    }
    const state = { playerCount, buyInAmount, numberOfChips, totalChipsCount };

    try {
      await saveState(slot, state);
      await savePersistentState(state);
      console.log(`Game state saved to ${slot}:`, state);
      Alert.alert("Success", `State saved to ${slot}`);
    } catch (error) {
      console.error("Error saving state:", error);
      Alert.alert("Error", "Failed to save state.");
    }
  };

  // Load game state from selected slot
  const handleLoad = async (slot: "SLOT1" | "SLOT2") => {
    try {
      const loadedState = await loadState(slot);
      if (loadedState) {
        setPlayerCount(loadedState.playerCount);
        setBuyInAmount(loadedState.buyInAmount);
        setNumberOfChips(loadedState.numberOfChips);
        setTotalChipsCount(loadedState.totalChipsCount);
        await savePersistentState(loadedState);
        console.log(`Game state loaded from ${slot}:`, loadedState);
        Alert.alert("Success", `State loaded from ${slot}`);
      } else {
        Alert.alert("Info", "No saved state found.");
      }
    } catch (error) {
      console.error("Error loading state:", error);
      Alert.alert("Error", "Failed to load state.");
    }
  };

  return (
    <ScrollView contentContainerStyle={{ padding: 20, flexGrow: 1 }}>
      <PlayerSelector playerCount={playerCount} setPlayerCount={setPlayerCount} />
      <BuyInSelector setBuyInAmount={setBuyInAmount} />
      <ChipDetection updateChipCount={(chipData) => {
        const chipCountArray = Object.values(chipData);
        setTotalChipsCount(chipCountArray);
      }} />
      <ChipsSelector
        totalChipsCount={totalChipsCount}
        setTotalChipsCount={setTotalChipsCount}
        numberOfChips={numberOfChips}
        setNumberOfChips={setNumberOfChips}
      />
      <ChipDistributionSummary
        playerCount={playerCount}
        buyInAmount={buyInAmount}
        totalChipsCount={totalChipsCount}
      />
      <Button title="Save to Slot 1" onPress={() => handleSave("SLOT1")} disabled={buyInAmount === null} />
      <Button title="Save to Slot 2" onPress={() => handleSave("SLOT2")} disabled={buyInAmount === null} />
      <Button title="Load from Slot 1" onPress={() => handleLoad("SLOT1")} />
      <Button title="Load from Slot 2" onPress={() => handleLoad("SLOT2")} />
    </ScrollView>
  );
};

export default IndexScreen;