using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace Assets.Scripts
{
    public class Item
    {
        private System.Random rand = new System.Random();
        ItemRarity rarity;
        ItemPlace place;
        string itemName;
        Dictionary<string, int> attributes;

        public Item(int luck)
        {
            attributes = new Dictionary<string, int>();
            int numberOfAttributes = 1;
            calculateRarity(luck);
            if (rarity > ItemRarity.COMMON)
            {
                numberOfAttributes = 2;
            }
            if (rarity > ItemRarity.RARE)
            {
                numberOfAttributes = 3;
            }
            if (rarity == ItemRarity.LEGENDARY)
            {
                numberOfAttributes = 0;
            }
            calculateAttributes(luck, numberOfAttributes);
            place = (ItemPlace)rand.Next(8);
            if (itemName != null)
            {
                itemName = rarity.ToString() + " " + place.ToString() + " of " + itemName;
            }
            else
            {
                itemName = rarity.ToString() + " " + place.ToString();
            }
            itemName = itemName.ToLower();
            itemName = char.ToUpper(itemName[0]) + itemName.Substring(1);
        }

        private void calculateRarity(int luck)
        {
            int number = rand.Next(101);
            if (number + luck < 74)
            {
                rarity = ItemRarity.COMMON;
            }
            else if (number + luck >= 75 && number + luck < 104)
            {
                rarity = ItemRarity.RARE;
            }
            else if (number + luck >= 105 && number + luck < 113)
            {
                rarity = ItemRarity.EPIC;
            }
            else if (number + luck >= 114)
            {
                rarity = ItemRarity.LEGENDARY;
            }
        }

        private void calculateAttributes(int luck, int numberOfAttributes)
        {
            if (numberOfAttributes != 0)
            {
                int[] indexes = new int[numberOfAttributes];
                int index;
                for (int i = 0; i < numberOfAttributes; i++)
                {
                    index = calculateIndex(indexes);
                    switch (index)
                    {
                        case 0:
                            if (i == 0)
                            {
                                itemName = "luck";
                            }
                            attributes.Add("LCK", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 1:
                            if (i == 0)
                            {
                                itemName = "intelligence";
                            }
                            attributes.Add("INT", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 2:
                            if (i == 0)
                            {
                                itemName = "dexterity";
                            }
                            attributes.Add("DEX", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 3:
                            if (i == 0)
                            {
                                itemName = "strength";
                            }
                            attributes.Add("STR", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 4:
                            if (i == 0)
                            {
                                itemName = "health";
                            }
                            attributes.Add("HP", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 5:
                            if (i == 0)
                            {
                                itemName = "mana";
                            }
                            attributes.Add("MP", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 6:
                            if (i == 0)
                            {
                                itemName = "health regeneration";
                            }
                            attributes.Add("HPR", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                        case 7:
                            if (i == 0)
                            {
                                itemName = "mana regeneration";
                            }
                            attributes.Add("MPR", Mathf.RoundToInt((float)(5 - (2 * i) + luck * 0.2)));
                            break;
                    }
                    indexes[0] = index;
                }
            }
            else
            {
                attributes.Add("MPR", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("HPR", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("MP", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("HP", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("STR", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("DEX", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("INT", Mathf.RoundToInt((float)(5 + luck * 0.2)));
                attributes.Add("LCK", Mathf.RoundToInt((float)(5 + luck * 0.2)));
            }
        }

        private int calculateIndex(int[] indexes)
        {
            int counter = 0;
            int index = 0;
            while (true)
            {
                index = rand.Next(8);
                counter = 0;
                for (int j = 0; j < indexes.Length; j++)
                {
                    if (indexes[j] == index)
                    {
                        counter++;
                        break;
                    }
                }
                if (counter == 0)
                {
                    break;
                }
            }
            return index;
        }

        public string getName()
        {
            return itemName;
        }

        public ItemPlace getPlace()
        {
            return place;
        }

        public string getDisplayText()
        {
            string displayText = "";
            displayText = displayText + itemName + "\r\n";
            if (rarity == ItemRarity.LEGENDARY)
            {
                displayText = displayText + "All attributes: +" + attributes["STR"];
            }
            else
            {
                foreach (string key in attributes.Keys)
                {
                    displayText = displayText + key + ": +" + attributes[key] + "\r\n";
                }
            }
            return displayText;
        }
    }

}