#include <world/world.h>
#include <state.h>

#include <stdlib.h>

void tc_add_chunk_to_loader(tc_chunkloader_s *loader, tc_entity_s *entity);


tc_worldgen_s tc_default_terrain_generator_g;
void tc_init_world_generators()
{
    tc_default_terrain_generator_g.name                 = "Default Terrain Generator";
    tc_default_terrain_generator_g.fn_generate_chunk    = &tc_generate_default_terrain_chunk;
}


void tc_init_worlds()
{
    tc_init_chunk_pool(256);
    tc_init_world_generators();
}



void tc_set_block_in_chunk(
    tc_chunk_s *chunk,
    uint8_t x, uint8_t y, uint8_t z,
    tc_block_s block
) {
    chunk->blocks[x][y][z]      = block.type_identifier;
}

void tc_draw_world(tc_world_s *world)
{
    for(u32_t loader_index = 0; loader_index < world->num_loaders; ++loader_index)
    {
        if(world->loaders[loader_index].is_rendered) tc_draw_chunkloader_zone(&world->loaders[loader_index]);
    }
}

tc_chunkloader_s tc_create_spawn_loader(tc_world_s *world)
{
    tc_chunk_location_s           loader_location;
    loader_location.world       = world;
    loader_location.grid_coords.x  = 0.0f;
    loader_location.grid_coords.y  = 0.0f;
    loader_location.grid_coords.z  = 0.0f;
    
    tc_chunkloader_s        loader              = tc_create_chunkloader(loader_location);
    loader.is_rendered          = TRUE;
    loader.extent.x             = 9.0f;
    loader.extent.z             = 9.0f;
    loader.extent.y             = 3.0f;
    
    return loader;
}

tc_world_s * tc_new_world(tc_worldgen_s *generator)
{
    tc_world_s             *world               = calloc(sizeof(tc_world_s), 1);
    world->on_chunk_create          = tc_new_hooklist(16);
    world->before_chunk_generate    = tc_new_hooklist(16);
    world->after_chunk_generate     = tc_new_hooklist(16);
    world->on_chunk_delete          = tc_new_hooklist(16);
    world->on_chunk_unload          = tc_new_hooklist(16);
    world->on_chunk_update          = tc_new_hooklist(16);
    world->worldgen                 = &tc_default_terrain_generator_g;
    world->num_loaders              = 1;
    world->loaders                  = malloc(sizeof(tc_chunkloader_s) * world->num_loaders);
    world->loaders[0]               = tc_create_spawn_loader(world);
    world->spawn_loader             = &world->loaders[0];
    
    tc_add_to_hooklist(&world->after_chunk_generate, (tc_fn_hook) tc_meshize_chunk, NULL);
    
    tc_run_hooklist(&tc_game_state_g.on_world_create, world);
    
    tc_update_world(world);
    
    return world;
}

void tc_unload_world(tc_world_s *world)
{
    tc_delete_chunkloader(*world->spawn_loader);
    free(world);
}