module.exports = {
	setup: function () { Creep.prototype = _Creep.prototype; }
}

class _Creep extends Creep {
	init() {
		if (this.memory.role == undefined) this.memory.role = ROLE_HARVESTER;
		if (this.memory.recharge == undefined) this.memory.recharge = true;
	}

	toggleChargeMode() {
		if (this.store.getFreeCapacity(RESOURCE_ENERGY) == 0) {
			this.memory.recharge = false;
		} else if (this.store.getUsedCapacity(RESOURCE_ENERGY) == 0) {
			this.memory.recharge = true;
		} else return;
		this.memory.target = undefined;
		this.memory.path = undefined;
	}

	findTarget(TARGET) {
		if (this.memory.target == undefined) {
			const target = this.pos.findClosestByPath(TARGET);
			if (target == null) return ERR_NOT_FOUND;
			else this.memory.target = target.id;
		}
		return OK;
	}

	findTarget(TARGET, filter) {
		if (this.memory.target == undefined) {
			const target = this.pos.findClosestByPath(TARGET, filter);
			if (target == null) return ERR_NOT_FOUND;
			else this.memory.target = target.id;
		}
		return OK;
	}

	harvestSource() {
		if (this.findTarget(FIND_SOURCES, {
			filter: (s) => {
				const area = s.room.lookAtArea(s.pos.y - 1, s.pos.x - 1, s.pos.y + 1, s.pos.y + 1, true);
				var free_space = 0;
				area.forEach(entry => {
					if (entry.type == "creep") free_space--;
					else if (entry.type == "terrain" && entry.terrain == "plain") free_space++;
					else if (entry.type == "terrain" && entry.terrain == "swamp") free_space++;
				});
				return free_space > 0;
			}
		}) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target);
		if (this.moveToTarget() == OK) {
			this.harvest(target);
			this.toggleChargeMode();
		}
	}

	harvesterJobs() {
		if (this.memory.counter == undefined) this.memory.counter = 0;
		switch (this.memory.counter % 4) {
			case 0: this.supplyStructures();
				break;
			case 1: this.upgradeRoom();
				break;
			case 2: this.repairStructures();
				break;
			case 3: this.buildConstructionSites();
				break;
			default:
				this.memory.counter++;
				break;
		}
		if (this.memory.target == undefined) this.memory.counter++;
	}

	supplyStructures() {
		if (this.findTarget(FIND_MY_STRUCTURES, {
			filter: (s) => {
				return (s.structureType == STRUCTURE_SPAWN ||
					s.structureType == STRUCTURE_EXTENSION ||
					s.structureType == STRUCTURE_TOWER ||
					s.structureType == STRUCTURE_STORAGE)
					&& 0 < s.store.getFreeCapacity();
			}
		}) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target);
		if (this.moveToTarget() == OK) {
			this.transfer(target, RESOURCE_ENERGY);
			this.toggleChargeMode();
		}
	}

	upgradeRoom() {
		this.memory.target = this.room.controller.id;
		if (this.moveToTarget() == OK) {
			if (this.upgradeController(this.room.controller) == OK) return;
			this.toggleChargeMode();
		}
	}

	repairStructures() {
		if (this.findTarget(FIND_MY_STRUCTURES, {
			filter: (s) => {
				return s.hits < s.hitsMax &&
					s.structureType != STRUCTURE_WALL &&
					s.structureType != STRUCTURE_RAMPART;
			}
		}) == ERR_NOT_FOUND);
		if (this.findTarget(FIND_MY_STRUCTURES, {
			filter: (s) => {
				return s.hits < s.hitsMax;
			}
		}) == ERR_NOT_FOUND) return;

		const target = Game.getObjectById(this.memory.target.id);
		if (this.moveToTarget() == OK) {
			this.repair(target);
			this.toggleChargeMode();
		}
	}

	buildConstructionSites() {
		if (this.findTarget(FIND_MY_CONSTRUCTION_SITES) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target.id);
		if (this.moveToTarget() == OK) {
			this.build(target);
			this.toggleChargeMode();
		}
	}

	moveToTarget() {
		const target = Game.getObjectById(this.memory.target)
		if (this.pos.inRangeTo(target.pos.x, target.pos.y, 1)) {
			this.memory.path = undefined;
			return OK;
		}
		if (this.pos.inRangeTo(target.pos.x, target.pos.y, 5)) {
			this.moveTo(target)
			return ERR_BUSY;
		}
		if (this.memory.path == undefined) {
			this.memory.path = this.pos.findPathTo(target.pos, {
				ignoreCreeps: true, range: 1
			});
		}
		const response = this.moveByPath(this.memory.path);
		if (response == OK) return ERR_BUSY;
		if (response == ERR_INVALID_ARGS || response == ERR_NOT_FOUND) {
			this.moveTo(target);
			this.memory.path = undefined;
			return ERR_BUSY;
		}
	}
}