#include "Building.hpp"

#include <cassert>

#include "../Logger.hpp"
#include "Province.hpp"

using namespace OpenVic2;

Building::Building(BuildingType const& new_type) : HasIdentifier { new_type.get_identifier() },
												   type { new_type } {}

bool Building::_can_expand() const {
	return level < type.get_max_level();
}

BuildingType const& Building::get_type() const {
	return type;
}

Building::level_t Building::get_level() const {
	return level;
}

Building::ExpansionState Building::get_expansion_state() const {
	return expansion_state;
}

Date const& Building::get_start_date() const {
	return start;
}

Date const& Building::get_end_date() const {
	return end;
}

float Building::get_expansion_progress() const {
	return expansion_progress;
}

return_t Building::expand() {
	if (expansion_state == ExpansionState::CanExpand) {
		expansion_state = ExpansionState::Preparing;
		expansion_progress = 0.0f;
		return SUCCESS;
	}
	return FAILURE;
}

/* REQUIREMENTS:
 * MAP-71, MAP-74, MAP-77
 */
void Building::update_state(Date const& today) {
	switch (expansion_state) {
		case ExpansionState::Preparing:
			start = today;
			end = start + type.get_build_time();
			break;
		case ExpansionState::Expanding:
			expansion_progress = static_cast<double>(today - start) / static_cast<double>(end - start);
			break;
		default: expansion_state = _can_expand() ? ExpansionState::CanExpand : ExpansionState::CannotExpand;
	}
}

void Building::tick(Date const& today) {
	if (expansion_state == ExpansionState::Preparing) {
		expansion_state = ExpansionState::Expanding;
	}
	if (expansion_state == ExpansionState::Expanding) {
		if (end <= today) {
			level++;
			expansion_state = ExpansionState::CannotExpand;
		}
	}
}

BuildingType::BuildingType(std::string const& new_identifier, Building::level_t new_max_level, Timespan new_build_time) : HasIdentifier { new_identifier },
																														  max_level { new_max_level },
																														  build_time { new_build_time } {
	assert(new_max_level >= 0);
	assert(build_time >= 0);
}

Building::level_t BuildingType::get_max_level() const {
	return max_level;
}

Timespan BuildingType::get_build_time() const {
	return build_time;
}

BuildingManager::BuildingManager() : building_types { "building types" } {}

return_t BuildingManager::add_building_type(std::string const& identifier, Building::level_t max_level, Timespan build_time) {
	if (identifier.empty()) {
		Logger::error("Invalid building type identifier - empty!");
		return FAILURE;
	}
	if (max_level < 0) {
		Logger::error("Invalid building type max level: ", max_level);
		return FAILURE;
	}
	if (build_time < 0) {
		Logger::error("Invalid building type build time: ", build_time);
		return FAILURE;
	}
	return building_types.add_item({ identifier, max_level, build_time });
}

void BuildingManager::lock_building_types() {
	building_types.lock();
}

BuildingType const* BuildingManager::get_building_type_by_identifier(std::string const& identifier) const {
	return building_types.get_item_by_identifier(identifier);
}

return_t BuildingManager::generate_province_buildings(Province& province) const {
	return_t ret = SUCCESS;
	province.reset_buildings();
	for (BuildingType const& type : building_types.get_items())
		if (province.add_building(type) != SUCCESS) ret = FAILURE;
	province.lock_buildings();
	return ret;
}