using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Stratego.Beans;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework;
using Stratego.Load;
using Stratego.Database;

namespace Stratego.Update
{
    class UpdateButtonEvent
    {
        private static Random rand = new Random();
        private static MouseState prevMouseState;
        private static KeyboardState prevKeyState;

        public static void update(Global global)
        {
            MouseState mouseState = Mouse.GetState();
            KeyboardState keyState = Keyboard.GetState();

            if (mouseState.LeftButton == ButtonState.Pressed && prevMouseState.LeftButton != ButtonState.Pressed)
            {
                Rectangle mousePos = new Rectangle(mouseState.X, mouseState.Y, 1, 1);
                foreach (MenuItem item in global.current.menu.items)
                {
                    if (item.pos.Intersects(mousePos))
                    {
                        if (item.name.Equals("exit")) processExitButton(global);
                        else if (item.name.Equals("options")) processOptionsButton(global);
                        else if (item.name.Equals("play")) processPlayButton(global);
                        else if (item.name.Equals("menu")) processMenuButton(global);
                        else if (item.name.Equals("undo")) processUndoButton(global);
                        else if (item.name.Equals("end")) processEndButton(global);
                        else if (item.name.Equals("auto")) processAutoButton(global);
                        else if (item.name.Equals("start")) processStartButton(global);
                        else if (item.name.Equals("login")) processLoginButton(global);
                    }
                }
            }

            //Keyboard Shortcuts
            if (global.current.menu.name.Contains("ingame"))
            {
                if (keyState.IsKeyDown(Keys.E) && !prevKeyState.IsKeyDown(Keys.E))
                {
                    processEndButton(global);
                }
                else if (keyState.IsKeyDown(Keys.M) && !prevKeyState.IsKeyDown(Keys.M))
                {
                    processMenuButton(global);
                }
                if (keyState.IsKeyDown(Keys.Z) && !prevKeyState.IsKeyDown(Keys.Z))
                {
                    processUndoButton(global);
                }
            }

            prevMouseState = mouseState;
            prevKeyState = keyState;
        }

        public static void processExitButton(Global global)
        {
            Environment.Exit(0);
        }
        public static void processOptionsButton(Global global)
        {

        }
        public static void processPlayButton(Global global)
        {
            LoadLevels.load(global);
            global.current.menu = global.getMenuByName("pregame");
        }
        public static void processMenuButton(Global global)
        {
            global.current.menu = global.getMenuByName("main");
        }
        public static void processUndoButton(Global global)
        {
            UpdateUnitMove.undoLastMove(global);
        }
        public static void processEndButton(Global global)
        {
            int dayNum = Convert.ToInt32(global.current.menu.getItemByName("daynum").msg);
            dayNum++;
            global.current.menu.getItemByName("daynum").msg = "" + dayNum;

            //Change current player variable
            if (global.current.owner == 1) global.current.owner = 2;

            //process AI thinking
            UpdateUnitMove.movedUnit = false;
            UpdateUnitMove.prevUnit = null;
            UpdateUnitMove.prevPos = null;

            //Make computer player think
            //WORK IN PROGRESS
            //ArtificialIntelligence.processAI(global);

            //Change current player variable
            if (global.current.owner == 2) global.current.owner = 1;
        }
        public static void processAutoButton(Global global)
        {
            placeUnits(global, 1, 370);
            placeUnits(global, 2, 290);
        }
        public static void processStartButton(Global global)
        {
            processAutoButton(global);
            //switch to ingame menu and begin coding gameplay work
            global.current.menu = global.getMenuByName("ingame");
        }
        public static void processLoginButton(Global global)
        {
            //Checking database and logging in
            Console.WriteLine("Logging in!");
            String userName = global.current.menu.getItemByName("inputUserName").msg.ToLower();
            String userPass = global.current.menu.getItemByName("inputUserPass").msg.ToLower();
            ConnectionUtil.initConnection(null);
            Boolean valid;
            if (!userName.Equals("") && !userPass.Equals(""))
            {
                valid = ConnectionUtil.validateLogin(userName, userPass);
            }
            else
            {
                valid = true;
            }
            if (valid)
            {
                global.current.userName = userName;
                global.current.menu = global.getMenuByName("main");
                if (userName.Equals("")) userName = "Default";
                global.current.menu.getItemByName("userName").msg = userName;
            }
            else
            {
                Console.WriteLine("Invalid :(");
            }
        }
        public static void placeUnits(Global global, int own, int yCap)
        {
            //randomly place enemy units on board
            while (true)
            {
                List<Unit> units = new List<Unit>();
                foreach (Unit unit in global.current.level.unitsOffBoard)
                    if (unit.owner == own) units.Add(unit);
                foreach (Unit unit in units)
                {
                    if (unit.owner == own)
                    {
                        foreach (GridBlock block in global.current.level.gridBoard)
                        {
                            //Check owner 1 placement
                            if (own == 1)
                            {
                                if (block.occupant == null && block.pos.Y > yCap)
                                {
                                    if (rand.Next(0, 10) < 1)
                                    {
                                        block.occupant = unit;
                                        unit.pos = block.pos;
                                        global.current.level.unitsOffBoard.Remove(unit);
                                        global.current.level.unitsOnBoard.Add(unit);
                                        foreach (GridBlock b in global.current.level.gridOffBoard1)
                                        {
                                            if (b.occupant == unit) b.occupant = null;
                                        }
                                        break;
                                    }
                                }
                            }
                            //Check owner 2 placement
                            else if (own == 2)
                            {
                                if (block.occupant == null && block.pos.Y < yCap)
                                {
                                    if (rand.Next(0, 10) < 1)
                                    {
                                        block.occupant = unit;
                                        unit.pos = block.pos;
                                        global.current.level.unitsOffBoard.Remove(unit);
                                        global.current.level.unitsOnBoard.Add(unit);
                                        foreach (GridBlock b in global.current.level.gridOffBoard2)
                                        {
                                            if (b.occupant == unit) b.occupant = null;
                                        }
                                        break;
                                    }
                                }
                            }
                        }
                    }
                }
                if (units.Count == 0) break;
            }
        }
    }
}