using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MLEM.Extended.Tiled;
using MLEM.Textures;
using MonoGame.Extended;

namespace GreatSpringGameJam {
    public class WaterDrop : Entity {

        private readonly bool growsPlants;
        private Vector2 velocity;
        private TimeSpan timeToLive;

        public WaterDrop(Map map, Vector2 position, Vector2 velocity) : base(map, position) {
            this.velocity = velocity;
            this.timeToLive = TimeSpan.FromSeconds(0.5F);
            this.growsPlants = Random.NextSingle() <= 0.25F;
        }

        public override void Update(GameTime time) {
            base.Update(time);

            this.Position += this.velocity;
            this.Collide(() => new RectangleF(this.Position - new Vector2(1 / 16F), new Vector2(2 / 16F)), ref this.velocity, out var onGround);
            if (onGround)
                this.velocity = Vector2.Zero;
            this.velocity.Y += 0.008F;

            this.timeToLive -= time.ElapsedGameTime;
            if (this.timeToLive <= TimeSpan.Zero) {
                if (this.growsPlants) {
                    var (x, y) = this.Position.ToPoint();
                    var tile = this.Map.GetTile("Ground", x, y);
                    if (!tile.IsBlank) {
                        var tilesetTile = this.Map.GetTilesetTile(tile);
                        var grown = tilesetTile.Properties.GetInt("GrownVersion");
                        if (grown != 0)
                            this.Map.SetTile("Ground", x, y, grown + 1);
                    }
                }
                this.Map.RemoveEntity(this);
            }
        }

        public override void Draw(GameTime time, SpriteBatch batch) {
            base.Draw(time, batch);
            var tex = StuffTexture[3, 0];
            batch.Draw(tex, this.Position * this.Map.TileSize - tex.Size.ToVector2() / 2, Color.White);
        }

    }
}