// Spaceship C# Script (version: 1.02)
// SPACE UNITY - Space Scene Construction Kit
// http://www.spaceunity.com
// (c) 2013 Stefan Persson

// DESCRIPTION:
// Thruster, steering and weapon control script for Spaceship prefab.

// INSTRUCTIONS:
// This script is attached to the Spaceship demo prefab. Configure parameters to suit your needs.

// PARAMETERS:
//  thrusters			(Thruster array containing reference to thrusters prefabs attached to the ship for propulsion)
//  rollRate			(multiplier for rolling the ship when steering left/right)	
//  yawRate				(multiplier for rudder/steering the ship when steering left/right)
//  pitchRate			(multiplier for pitch when steering up/down)
//  weaponMountPoints	(Vector3 array for mount points relative to ship where weapons will fire from)
//  laserShotPrefab		(reference to Laser Shot prefab, i.e. the laser bullet prefab to be instanitated)
//  soundEffectFire		(sound effect audio clip to be played when firing weapon)

// HINTS:
// The propulsion force of the thruster is configured for each attached thruster in the Thruster script.

// Version History
// 1.02 - Prefixed with SU_Spaceship to avoid naming conflicts.
// 1.01 - Initial Release.

using UnityEngine;
using System.Collections;

public class SU_Spaceship : MonoBehaviour 
{
	
	// Array of thrusters attached to the spaceship
	public SU_Thruster[] thrusters;
	// Specify the roll rate (multiplier for rolling the ship when steering left/right)	
	public float rollRate = 100.0f;
	// Specify the yaw rate (multiplier for rudder/steering the ship when steering left/right)
	public float yawRate = 30.0f;
	// Specify the pitch rate (multiplier for pitch when steering up/down)
	public float pitchRate = 100.0f;
	// Weapon mount points on ship (this is where lasers will be fired from)
	public Vector3[] weaponMountPoints;	
	// Laser shot prefab
	public Transform[] laserShotPrefab;
	// Laser shot sound effect
	public AudioClip[] soundEffectFire;

	public CameraFollow followCamera;
	// Private variables
	private Rigidbody _cacheRigidbody;
	private float shootFreq = 0.25f;
	private float lastShootTime = 0;
	private int weaponType = 0;

	private bool userControl = true;

	void Start () 
	{
		// Ensure that the thrusters in the array have been linked properly
		foreach (SU_Thruster _thruster in thrusters)
		{
			if (_thruster == null) 
			{
				Debug.LogError("Thruster array not properly configured. Attach thrusters to the game object and link them to the Thrusters array.");
			}			
		}
		
		// Cache reference to rigidbody to improve performance
		_cacheRigidbody = GetComponent<Rigidbody>();
		if (_cacheRigidbody == null) 
		{
			Debug.LogError("Spaceship has no rigidbody - the thruster scripts will fail. Add rigidbody component to the spaceship.");
		}
    }
    void Update () 
	{
		if(!userControl)return;

		lastShootTime+=Time.deltaTime;
		if(InputManage.touchInput&&InputManage.isButtonDown
		   ||InputManage.touchInput==false && Input.GetMouseButton(0))
		{
			if(lastShootTime>shootFreq)
			{
				lastShootTime=0;
				foreach (Vector3 _wmp in weaponMountPoints) 
				{
					// Calculate where the position is in world space for the mount point
					Vector3 _pos = transform.position + transform.right * _wmp.x + transform.up * _wmp.y + transform.forward * _wmp.z;
					// Instantiate the laser prefab at position with the spaceships rotation
					// Specify which transform it was that fired this round so we can ignore it for collision/hit
					//Transform _laserShot = (Transform) Instantiate(laserShotPrefab[weaponType], _pos, transform.rotation);
					//_laserShot.GetComponent<SU_LaserShot>().firedBy = transform;
					WeaponFireUtils.FireLaser(laserShotPrefab[weaponType], _pos, this.transform.rotation, this.gameObject, GameManager.ENEMY_TAG);
				}
				// Play sound effect when firing
				if (soundEffectFire[weaponType] != null) 
				{
					GetComponent<AudioSource>().PlayOneShot(soundEffectFire[weaponType]);
				}
			}
		}

		if(InputManage.touchInput == false && Input.GetKeyDown(KeyCode.F3))
		{
			foreach (SU_Thruster _thruster in thrusters) 
			{
				_thruster.SwitchThruster();
			}
		}
		if(InputManage.touchInput == false && Input.GetMouseButtonDown(1))
		{
			foreach(SU_Thruster _thruster in thrusters)
			{
				_thruster.StartBurst();
			}
		}
		if(InputManage.touchInput == false && Input.GetKeyDown(KeyCode.F2))
		{
			weaponType = (weaponType+1)%laserShotPrefab.Length;
			Weapon.weaponType = weaponType;
		}
	}

	void FixedUpdate () 
	{
		if(!userControl)return;
		// In the physics update...
		Vector2 left;
		if (InputManage.touchInput) 
		{
			left = InputManage.leftJoyPosition;
		}
		else 
		{
			//left = new Vector2(Input.GetAxis("Horizontal"),Input.GetAxis("Vertical"));
			Vector2 cen = new Vector2(Screen.width/2,Screen.height/2);
			Vector2 pos = Input.mousePosition;
			left = pos-cen;
			left.x=left.x/Screen.width*2;
			left.y=left.y/Screen.height*2;
		}

		//_cacheRigidbody.AddRelativeTorque(new Vector3(0,0,-left.x*rollRate*_cacheRigidbody.mass));
		//_cacheRigidbody.AddRelativeTorque(new Vector3(0,left.x*yawRate*_cacheRigidbody.mass,0));
		//_cacheRigidbody.AddRelativeTorque(new Vector3(-left.y*pitchRate*_cacheRigidbody.mass,0,0));
		transform.Rotate(-left.y*rollRate,left.x*yawRate,0,Space.Self);
	}
	public void Finish()
	{
		if(followCamera==null)
		{
			followCamera = GameObject.FindObjectOfType<CameraFollow>();
		}
		followCamera.ChangeToThirdPerson();

		userControl = false;
		followCamera.enabled = false;
		foreach (SU_Thruster _thruster in thrusters) 
		{
			_thruster.StartThruster();
		}
	}
}