import 'dart:math';

import 'package:flutter/foundation.dart';
import '../game/model/entity.dart';
import '../game/model/item.dart';
import '../game/data/item_table.dart'; // Import ItemTable
import '../utils/game_math.dart'; // Import GameMath

enum ActionType { attack, defend }
enum RiskLevel { safe, normal, risky }

class BattleProvider with ChangeNotifier {
  late Character player;
  late Character enemy;
  List<String> battleLogs = [];
  bool isPlayerTurn = true;

  int stage = 1;
  List<Item> rewardOptions = [];
  bool showRewardPopup = false;

  BattleProvider() {
    initializeBattle();
  }

  void initializeBattle() {
    stage = 1;
    player = Character(name: "Player", maxHp: 100, armor: 0, atk: 10, baseDefense: 5); // Added baseDefense 5
    
    // Provide starter equipment
    final starterSword = Item(name: "Wooden Sword", description: "A basic sword", atkBonus: 5, hpBonus: 0, slot: EquipmentSlot.weapon);
    final starterArmor = Item(name: "Leather Armor", description: "Basic protection", atkBonus: 0, hpBonus: 20, slot: EquipmentSlot.armor);
    final starterShield = Item(name: "Wooden Shield", description: "A small shield", atkBonus: 0, hpBonus: 0, armorBonus: 3, slot: EquipmentSlot.shield);
    final starterRing = Item(name: "Copper Ring", description: "A simple ring", atkBonus: 1, hpBonus: 5, slot: EquipmentSlot.accessory);

    player.addToInventory(starterSword);
    player.equip(starterSword);
    
    player.addToInventory(starterArmor);
    player.equip(starterArmor);
    
    player.addToInventory(starterShield);
    player.equip(starterShield);
    
    player.addToInventory(starterRing);
    player.equip(starterRing);

    _spawnEnemy();
    battleLogs.clear();
    _addLog("Battle started! Stage $stage");
    isPlayerTurn = true;
    showRewardPopup = false;
    notifyListeners();
  }

  void _spawnEnemy() {
    int enemyHp = 5 + (stage - 1) * 20;
    int enemyAtk = 8 + (stage - 1) * 2;
    enemy = Character(name: "Enemy", maxHp: enemyHp, armor: 0, atk: enemyAtk);
  }

  void playerAction(ActionType type, RiskLevel risk) {
    if (!isPlayerTurn || player.isDead || enemy.isDead || showRewardPopup) return;

    isPlayerTurn = false;
    notifyListeners();

    _addLog("Player chose to ${type.name} with ${risk.name} risk.");

    final random = Random();
    bool success = false;
    double efficiency = 1.0;

    switch (risk) {
      case RiskLevel.safe:
        success = random.nextDouble() < 1.0; // 100%
        efficiency = 0.5; // 50%
        break;
      case RiskLevel.normal:
        success = random.nextDouble() < 0.8; // 80%
        efficiency = 1.0; // 100%
        break;
      case RiskLevel.risky:
        success = random.nextDouble() < 0.4; // 40%
        efficiency = 2.0; // 200%
        break;
    }

    if (success) {
      if (type == ActionType.attack) {
        int damage = (player.totalAtk * efficiency).toInt();
        _applyDamage(enemy, damage);
        _addLog("Player dealt $damage damage to Enemy.");
      } else {
        int armorGained = (player.totalDefense * efficiency).toInt(); // Changed to totalDefense
        player.armor += armorGained;
        _addLog("Player gained $armorGained armor.");
      }
    } else {
      _addLog("Player's action missed!");
    }

    if (enemy.isDead) {
      _onVictory();
      return;
    }

    Future.delayed(const Duration(seconds: 1), () => _enemyTurn());
  }

  Future<void> _enemyTurn() async {
    if (!isPlayerTurn && (player.isDead || enemy.isDead)) return; // Check if it's the enemy's turn and battle is over

    _addLog("Enemy's turn...");

    // Enemy attacks player
    await Future.delayed(const Duration(seconds: 1)); // Simulating thinking time

    int incomingDamage = enemy.totalAtk;
    int damageToHp = 0;

    if (player.armor > 0) {
      if (player.armor >= incomingDamage) {
        player.armor -= incomingDamage;
        damageToHp = 0;
        _addLog("Armor absorbed all $incomingDamage damage.");
      } else {
        damageToHp = incomingDamage - player.armor;
        _addLog("Armor absorbed ${player.armor} damage.");
        player.armor = 0;
      }
    } else {
      damageToHp = incomingDamage;
    }

    if (damageToHp > 0) {
      _applyDamage(player, damageToHp);
      _addLog("Enemy dealt $damageToHp damage to Player HP.");
    }

    // Player's turn starts, armor decays
    if (player.armor > 0) {
      player.armor = (player.armor * 0.5).toInt();
      _addLog("Player's armor decayed to ${player.armor}.");
    }

    if (player.isDead) {
      _addLog("Player defeated! Enemy wins!");
    }

    isPlayerTurn = true;
    notifyListeners();
  }

  void _applyDamage(Character target, int damage) {
    target.hp -= damage;
    if (target.hp < 0) target.hp = 0;
  }

  void _addLog(String message) {
    battleLogs.add(message);
    notifyListeners();
  }

  void _onVictory() {
    _addLog("Enemy defeated! Choose a reward.");
    
    final random = Random();
    List<ItemTemplate> allTemplates = List.from(ItemTable.allItems);
    allTemplates.shuffle(random); // Shuffle to randomize selection

    // Take first 3 items (ensure distinct templates if possible, though list is small now)
    int count = min(3, allTemplates.length);
    rewardOptions = allTemplates.sublist(0, count).map((template) {
      return template.createItem(stage: stage);
    }).toList();

    showRewardPopup = true;
    notifyListeners();
  }

  void selectReward(Item item) {
    bool added = player.addToInventory(item);
    if (added) {
      _addLog("Added ${item.name} to inventory.");
    } else {
      _addLog("Inventory is full! ${item.name} discarded.");
    }
    
    // Heal player after selecting reward
    int healAmount = GameMath.floor(player.totalMaxHp * 0.5);
    player.heal(healAmount);
    _addLog("Stage Cleared! Recovered $healAmount HP.");

    stage++;
    showRewardPopup = false;
    
    _spawnEnemy();
    _addLog("Stage $stage started! A wild ${enemy.name} appeared.");
    
    isPlayerTurn = true;
    notifyListeners();
  }

  void equipItem(Item item) {
    if (player.equip(item)) {
      _addLog("Equipped ${item.name}.");
    } else {
      _addLog("Failed to equip ${item.name}."); // Should not happen if logic is correct
    }
    notifyListeners();
  }

  void unequipItem(Item item) {
    if (player.unequip(item)) {
      _addLog("Unequipped ${item.name}.");
    } else {
      _addLog("Failed to unequip ${item.name} (Inventory might be full).");
    }
    notifyListeners();
  }
}