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

public class InputManager : Singleton<InputManager>
{
	private List<Command> m_CommandRecord;
	public List<Command> CommandRecord
	{
		get
		{
			return m_CommandRecord;
		}
	}
	private readonly int kCommandRecords = 10;

	// 本帧内的指令，会在下一帧被清空
	private Command m_CurrentCommand;
	public Command CurrentCommand
	{
		get
		{
			return m_CurrentCommand;
		}
	}

	private enum Axis { Up, Down, Left, Right};

	private bool[] m_Axis = new bool[4] { false, false, false, false};

	public void Init()
	{
		m_CommandRecord = new List<Command>();
		m_CurrentCommand = new Command(GamepadButton.Blank, 0);
	}

	private bool GetAxis(Axis axis)
	{
		return false;
		bool axisRaw = false;
		switch (axis)
		{
			case Axis.Left: axisRaw = Input.GetAxisRaw("Horizontal") == -1; break;
			case Axis.Right: axisRaw = Input.GetAxisRaw("Horizontal") == 1; break;
			case Axis.Down: axisRaw = Input.GetAxisRaw("Vertical") == -1; break;
			case Axis.Up: axisRaw = Input.GetAxisRaw("Vertical") == 1; break;
		}
		if (axisRaw)
		{
			if(!m_Axis[(int)axis])
			{
				m_Axis[(int)axis] = true;
				return true;
			}
			return false;
		}
		else
		{
			m_Axis[(int)axis] = false;
			return false;
		}
	}

	public void Update()
	{
		GamepadButton cmd = GamepadButton.Blank;
		// 移动
		if (Input.GetKeyDown("w") || GetAxis(Axis.Up))
			cmd = GamepadButton.Up;
		if (Input.GetKeyDown("s") || GetAxis(Axis.Down))
			cmd = GamepadButton.Down;
		if (Input.GetKeyDown("a") || GetAxis(Axis.Left))
			cmd = GamepadButton.Left;
		if (Input.GetKeyDown("d") || GetAxis(Axis.Right))
			cmd = GamepadButton.Right;
		// 动作
		if (Input.GetKeyDown("j") || Input.GetKeyDown(KeyCode.Joystick1Button2))
			cmd = GamepadButton.Circle;
		if (Input.GetKeyDown("k") || Input.GetKeyDown(KeyCode.Joystick1Button0))
			cmd = GamepadButton.Triangle;
		if (Input.GetKeyDown("l") || Input.GetKeyDown(KeyCode.Joystick1Button1))
			cmd = GamepadButton.Square;
		if (Input.GetKeyDown("u") || Input.GetKeyDown(KeyCode.Joystick1Button3))
			cmd = GamepadButton.Cross;

		if(cmd != GamepadButton.Blank)
		{
			float time = Time.time;
			Command command = new Command(cmd, time);
			//Debug.Log(CommandToString(command));

			m_CurrentCommand = command;
			m_CommandRecord.Add(command);

			if(m_CommandRecord.Count > 10)
				m_CommandRecord.RemoveRange(0, m_CommandRecord.Count - 10);
		}
		else if(m_CurrentCommand.code != GamepadButton.Blank)
		{
			m_CurrentCommand = Command.Blank;
		}
	}

	string CommandCodeToString(GamepadButton cmd)
	{
		switch(cmd)
		{
			case GamepadButton.Left: return "←";
			case GamepadButton.Right: return "→";
			case GamepadButton.Up: return "↑";
			case GamepadButton.Down: return "↓";
			case GamepadButton.Circle: return "○";
			case GamepadButton.Triangle: return "△";
			case GamepadButton.Square: return "□";
			case GamepadButton.Cross: return "×";
			default: return "Unknown";
		}
	}

	string CommandToString(Command cmd)
	{
		string sign = CommandCodeToString(cmd.code);
		return sign + "      " + cmd.time + "s" + "      " + cmd.id;
	}

	string GetGamepadButtonKey(GamepadButton button)
	{
		switch (button)
		{
			case GamepadButton.Blank: return "";
			case GamepadButton.Up: return "w";
			case GamepadButton.Down: return "s";
			case GamepadButton.Left: return "a";
			case GamepadButton.Right: return "d";
			case GamepadButton.Circle: return "j";
			case GamepadButton.Triangle: return "k";
			case GamepadButton.Square: return "l";
			case GamepadButton.Cross: return "u";
		}
		return "";
	}

	bool GetGamepadButtonState(GamepadButton button)
	{
		switch (button)
		{
			case GamepadButton.Up: return m_Axis[(int)Axis.Up];
			case GamepadButton.Down: return m_Axis[(int)Axis.Down];
			case GamepadButton.Left: return m_Axis[(int)Axis.Left];
			case GamepadButton.Right: return m_Axis[(int)Axis.Right];
			case GamepadButton.Circle: return Input.GetKey(KeyCode.Joystick1Button2);
			case GamepadButton.Triangle: return Input.GetKey(KeyCode.Joystick1Button0);
			case GamepadButton.Square: return Input.GetKey(KeyCode.Joystick1Button1);
			case GamepadButton.Cross: return Input.GetKey(KeyCode.Joystick1Button3);
		}
		return false;
	}

	public bool IsButtonHold(GamepadButton button)
	{
		return Input.GetKey(GetGamepadButtonKey(button)) || GetGamepadButtonState(button);
	}

}