/*
 * Copyright (C) 2021  Christopher J. Howard
 *
 * This file is part of Antkeeper source code.
 *
 * Antkeeper source code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Antkeeper source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Antkeeper source code.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "game/states/brood.hpp"
#include "entity/archetype.hpp"
#include "entity/commands.hpp"
#include "entity/components/observer.hpp"
#include "entity/components/camera-follow.hpp"
#include "entity/components/terrain.hpp"
#include "entity/components/transform.hpp"
#include "entity/systems/control.hpp"
#include "entity/systems/camera.hpp"
#include "entity/systems/tool.hpp"
#include "animation/screen-transition.hpp"
#include "animation/ease.hpp"
#include "resources/resource-manager.hpp"
#include "renderer/passes/sky-pass.hpp"

namespace game {
namespace state {
namespace brood {

void enter(game::context* ctx)
{
	// Switch to underground camera
	ctx->surface_camera->set_active(false);
	ctx->underground_camera->set_active(true);
	
	ctx->underground_ambient_light->set_intensity(1.0f);
	
	// Create camera focal point
	{
		entity::component::transform focal_point_transform;
		focal_point_transform.local = math::identity_transform<float>;
		focal_point_transform.warp = true;
		ctx->entity_registry->assign_or_replace<entity::component::transform>(ctx->focal_point_entity, focal_point_transform);
		
		entity::component::camera_follow focal_point_follow;
		ctx->entity_registry->assign_or_replace<entity::component::camera_follow>(ctx->focal_point_entity, focal_point_follow);
	}
	
	// Setup camera
	ctx->underground_camera->look_at({0, 0, 1}, {0, 0, 0}, {0, 1, 0});
	ctx->underground_camera->set_exposure(0.0f);
	
	ctx->camera_system->set_camera(ctx->underground_camera);
	ctx->tool_system->set_camera(ctx->underground_camera);
	ctx->tool_system->set_orbit_cam(ctx->camera_system->get_orbit_cam());
	
	entity::system::control* control_system = ctx->control_system;
	control_system->update(0.0, 0.0);
	control_system->set_nest(nullptr);
	
	// Create larva
	{
		entity::archetype* larva_archetype = ctx->resource_manager->load<entity::archetype>("ant-larva.ent");
		auto larva_eid = larva_archetype->create(*ctx->entity_registry);
		entity::command::warp_to(*ctx->entity_registry, larva_eid, {0.0f, 0.0f, 0.0f});
		entity::command::assign_render_layers(*ctx->entity_registry, larva_eid, 0b1);
	}
	
	// Create cocoon
	{
		entity::archetype* cocoon_archetype = ctx->resource_manager->load<entity::archetype>("ant-cocoon.ent");
		auto cocoon_eid = cocoon_archetype->create(*ctx->entity_registry);
		entity::command::warp_to(*ctx->entity_registry, cocoon_eid, {-50, 0.1935f, 0});
		entity::command::assign_render_layers(*ctx->entity_registry, cocoon_eid, 0b1);
	}
	
	ctx->underground_scene->update_tweens();
	
	// Start fade in
	ctx->fade_transition->transition(1.0f, true, ease<float>::in_quad);
}

void exit(game::context* ctx)
{}

} // namespace brood
} // namespace state
} // namespace game