using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MLEM.Extensions;
using MLEM.Misc;
using MLEM.Startup;
using MLEM.Textures;

namespace TouchyTickets.Attractions {
    [DataContract]
    public class Attraction {

        public static readonly UniformTextureAtlas Texture = new UniformTextureAtlas(MlemGame.LoadContent<Texture2D>("Textures/Attractions"), 16, 16);
        public static readonly Vector2 TileSize = new Vector2(Texture.RegionWidth, Texture.RegionHeight);

        [DataMember]
        public readonly AttractionType Type;
        [DataMember]
        private float ticketPercentage;

        public Attraction(AttractionType type) {
            this.Type = type;
        }

        public float Update(GameTime time, TimeSpan passed, ParkMap map, Point position) {
            var genRate = this.Type.GetGenerationRate();

            // only apply dynamic upgrades here, static ones go into the type
            if (Upgrade.FoodCourtModifier.IsActive() && this.GetSurrounding(map, position, AttractionType.FoodCourt).Any())
                genRate *= 2;
            if (Upgrade.SpiralSlideModifier.IsActive() && this.GetSurrounding(map, position, AttractionType.SpiralSlide).Any())
                genRate *= 2;

            this.ticketPercentage += genRate * (float) passed.TotalSeconds;
            var amount = this.ticketPercentage.Floor();
            if (amount > 0) {
                GameImpl.Instance.Tickets += amount;
                this.ticketPercentage -= amount;
            }
            // return the generation rate per second
            return genRate;
        }

        public IEnumerable<Attraction> GetSurrounding(ParkMap map, Point position, AttractionType type) {
            foreach (var tile in this.Type.GetCoveredTiles()) {
                foreach (var dir in Direction2Helper.Adjacent) {
                    var other = map.GetAttractionAt(position + tile + dir.Offset());
                    if (other != null && other != this && other.Type == type)
                        yield return other;
                }
            }
        }

    }
}