// Copyright © 2017 Project Golan, all rights reserved.
#define _GNU_SOURCE // Required for sincos(3). See feature_test_macros(7)
#include "g_player.h"

#include "g_stage.h"
#include "m_math.h"

#include <Doominati.h>

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

// Types ---------------------------------------------------------------------|

enum G_mslty
{
   missile_player,
};

// Extern Objects ------------------------------------------------------------|

int     G_Player_Count;
G_playr G_Player_InGame[G_Player_max];

// Static Functions ----------------------------------------------------------|

//
// G_Player_applyVelocity
//
static void G_Player_applyVelocity(G_playr th)
{
   DGE_Point3R ax = DGE_Input_GetAxis(1);
   accum vx = (accum)ax.x, vy = (accum)ax.y;

   float mag = sqrtf(vx * vx + vy * vy);
   float ang = atan2f(vy, vx);
   float s, c;

   sincosf(ang, &s, &c);

   th.vx = th.vx + c * mag * 5;
   th.vy = th.vy - s * mag * 5;

   // TODO: apply animation based on X velocity here
}

// Extern Functions ----------------------------------------------------------|

//
// G_Missile_Fire
//
void G_Missile_Fire(enum G_mslty type, unsigned owner, fixed x, fixed y, fixed z, ulfra yaw)
{
   G_missl th = {DGE_MissileEntity_Create(0)};
   th.subtype = subtype_missile;

   th.x = x;
   th.y = y;
   th.z = z;
   th.yaw = yaw;
   th.health = 1;
   th.damage = 1;
   th.owner = owner;

   float s, c;
   sincosf(M_angle(yaw), &s, &c);

   switch(type)
   {
   case missile_player:
      th.sprite = DGE_Texture_Get(s"ent/missile");
      th.rsx = 3;
      th.rsy = 16;
      th.sx = 4;
      th.sy = 4;
      th.sz = 4;
      th.vx = c * 14;
      th.vy = s * 14;
      break;
   }
}

//
// G_Player_Think
//
DGE_Callback
void G_Player_Think(unsigned id)
{
   G_playr th = {id};
   // TODO: remove if david makes IEMs 0-init
   th.ammo = 0;
   th.lives = 5;
   th.nextfire = 0;

   DGE_Object_RefAdd(id);
   G_Player_InGame[G_Player_Count++] = th;

   while(th.health > 0)
   {
      G_Player_applyVelocity(th);

      if(th.nextfire < G_Time) {
         G_Missile_Fire(missile_player, th.id, th.x - 7, th.y - 10, th.z, 0);
         G_Missile_Fire(missile_player, th.id, th.x + 7, th.y - 10, th.z, 0);
         th.nextfire = G_Time + 3;
      }

      DGE_Task_Sleep(0, 1);
   }

   G_Player_InGame[--G_Player_Count] = (G_playr){0};
   DGE_Object_RefSub(id);
}

// EOF