#import "game.h"
#import "graphics.h"
#import "gl_headers.h"
#import "vector.h"
#import "interpolation.h"
#import "memory.h"
#import "resources.h"
#import "model.h"
#import "keyboard.h"

#include "SDL.h"

void process_events()
{
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        switch (event.type) {
            case SDL_KEYDOWN:
            case SDL_KEYUP:
                update_key_state(event.key.keysym.sym, event.key.state);
                break;
            case SDL_QUIT:
                return;
            default:
                break;
        }
    }
}

void draw_face()
{
    glBegin(GL_TRIANGLES); {
        glVertex3i(-3,3,0);
        glVertex3i(-3,1,0);
        glVertex3i(-1,3,0);
        glVertex3i(-1,1,0);
        glVertex3i(-3,1,0);
        glVertex3i(-1,3,0);
        
        glVertex3i(3,3,0);
        glVertex3i(3,1,0);
        glVertex3i(1,3,0);
        glVertex3i(1,1,0);
        glVertex3i(3,1,0);
        glVertex3i(1,3,0);
        
        glVertex3i(0,-3,0);
        glVertex3i(3,-1,0);
        glVertex3i(-3,-1,0);
    } glEnd();
}

void draw(game_state *g)
{
    glPushMatrix(); {
        glColor3f(0,0,0);
        glTranslatef(UNPACK_VECTOR(g->player_pos));
        draw_face();
    } glPopMatrix();
    
    glPushMatrix(); {
        glColor3f(1,0,0);
        draw_face();
    } glPopMatrix();
    
    glPushMatrix(); {
        glColor3f(1,0,0);
        draw_face();
    } glPopMatrix();
    
    glPushMatrix(); {
        glColor3f(0,1,0);
        glTranslatef(-10,0,-3);
        draw_face();
    } glPopMatrix();
    
    glPushMatrix(); {
        glColor3f(0,0,1);
        glTranslatef(10,0,-5);
        draw_face();
    } glPopMatrix();
}

void move_player(game_state *g, vector delta)
{
    g->player_pos = vec_add(g->player_pos, delta);
}

#define GLIDE_AND_MOVE(x,y,z,t) register_vector_glide(g->gfx->cam, make_vector(x, y, z), &move_camera, t); register_vector_glide(g, make_vector(x, y, z), &move_player, t)

void go_up     (game_state *g) { GLIDE_AND_MOVE(0,0, 2, 0.1); }
void go_down   (game_state *g) { GLIDE_AND_MOVE(0,0,-2, 0.1); }
void go_left   (game_state *g) { GLIDE_AND_MOVE( 2,0,0, 0.1); }
void go_right  (game_state *g) { GLIDE_AND_MOVE(-2,0,0, 0.1); }
void quit_game (game_state *g) { g->done = 1; }

void run_game(graphics *g, game_settings settings)
{
    game_state *game = autorelease(alloc(sizeof(game_state)));
    game->done = 0;
    game->gfx = g;
    game->player_pos = zero_vector;
    g->cam->eye = make_vector(0, 10, -10);
    bind_key(SDLK_UP, &go_up, 0.1);
    bind_key(SDLK_DOWN, &go_down, 0.1);
    bind_key(SDLK_LEFT, &go_left, 0.1);
    bind_key(SDLK_RIGHT, &go_right, 0.1);
    bind_key(SDLK_ESCAPE, &quit_game, key_down_only);
    
    model teapot = autodesk_3ds.load(resource_path("model", "Teapot C4d.3ds"));
    autodesk_3ds.load(resource_path("model", "Square C4d.3ds"));
    autodesk_3ds.load(resource_path("model", "Teapot 3ds.3DS"));
    autodesk_3ds.load(resource_path("model", "Eyething C4d.3ds"));
    
    while (!game->done) {
        push_autorelease();
        
        glLoadIdentity();
        
        process_events();
        clear_screen();
        keyboard_actions(game);
        run_glides();
        
        apply_camera(g->cam);
        
        
        glPushMatrix(); {
            glScalef(0.1,0.1,0.1);
            autodesk_3ds.draw(teapot);
        } glPopMatrix();
        draw(game);
        
        SDL_GL_SwapBuffers();
        
        pop_autorelease();
    }
    SDL_Quit();
}