using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework.Input;

namespace TalkingIsAFreeAction
{
    public static class Input
    {
        public static float CLIMBSPEED = 200;

        public static KeyboardState oldState = Keyboard.GetState();
        public static KeyboardState newState = Keyboard.GetState();

        public static void Update(double milliseconds)
        {
            oldState = newState;
            newState = Keyboard.GetState();

            //------------FREE MODE ONLY---------
            if (Main.currentMode == Main.Mode.Free)
            {
                //Check if stepped off ladder
                Object climbingLadder = null;
                for (int i = 0; i < Main.currentArea.objects.Count; i++)
                {
                    Object theObject = Main.currentArea.objects[i];
                    if (theObject.special == "ladder")
                    {
                        if (Util.CheckCollision(Main.player, theObject))
                        {
                            climbingLadder = theObject;
                        }
                    }
                }
                if (climbingLadder == null) Main.climbing = false;

                if (newState.IsKeyDown(Keys.Left)) Physics.TryAccelerateX(Main.player, -30);
                else if (newState.IsKeyDown(Keys.Right)) Physics.TryAccelerateX(Main.player, 30);
                else Main.player.velocityX = 0;

                //Jump or climb ladder
                if (newState.IsKeyDown(Keys.Up))
                {
                    if (climbingLadder != null) //Climb
                    {
                        //Center player...
                        Main.player.x = climbingLadder.x + (climbingLadder.width / 2 - Main.player.width / 2);
                        //Climb up
                        float targetY = Main.player.y - CLIMBSPEED * ((float)milliseconds / 1000f);

                        //Check for collisions
                        if (Physics.CheckIfPassable(Main.player.x, targetY, Main.player.width, Main.player.height))
                        {
                            Main.player.y = targetY;
                        }
                        Main.player.velocityY = 0;
                        Main.climbing = true;
                    }
                    else //Jump
                    {
                        if (Main.player.onGroundTimer > 0.1f) { Main.player.velocityY = -500; Main.player.onGroundTimer = 0f; }
                    }
                }

                else if (newState.IsKeyDown(Keys.Down))
                {
                    if (climbingLadder != null) //Climb
                    {
                        //Center player...
                        Main.player.x = climbingLadder.x + (climbingLadder.width / 2 - Main.player.width / 2);
                        //Climb down
                        float targetY = Main.player.y + CLIMBSPEED * ((float)milliseconds / 1000f);

                        //Check for collisions
                        if (Physics.CheckIfPassable(Main.player.x, targetY, Main.player.width, Main.player.height))
                        {
                            Main.player.y = targetY;
                        }
                        Main.player.velocityY = 0;
                        Main.climbing = true;
                    }
                }

                //Interact
                if (KeyPressed(Keys.Z) || KeyPressed(Keys.W)) Main.Interact();

                //Carry or drop
                if (KeyPressed(Keys.X) || KeyPressed(Keys.Y)) Main.Carry();

                if (KeyPressed(Keys.Escape))
                {
                    bool atMenu = false;
                    if (Main.currentArea != null)
                    {
                        if (Main.currentArea.name == "menu") atMenu = true;
                    }
                    if (atMenu) Environment.Exit(0);
                    else Main.SwitchLevel("menu");
                }
            }

            //------------TEXT MODE ONLY--------
            else if (Main.currentMode == Main.Mode.Text)
            {
                Main.player.velocityX = 0;
                if (KeyPressed(Keys.Z)) Textbox.Poke();
            }

            if (KeyPressed(Keys.F)) VBXSE.SpriteEngine.ToggleFullscreen();
            if ((newState.IsKeyDown(Keys.LeftAlt) || newState.IsKeyDown(Keys.RightAlt)) && KeyPressed(Keys.Enter)) VBXSE.SpriteEngine.ToggleFullscreen();
            
        }

        public static bool KeyPressed(Keys key) { return (newState.IsKeyDown(key) && oldState.IsKeyUp(key)); }
    }
}