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) {
			this.memory.target = this.pos.findClosestByPath(target);
			if (this.memory.target == null) {
				this.memory.target = undefined;
				return ERR_NOT_FOUND;
			}
		}
		return OK;
	}

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

	harvestSource() {
		if (this.findTarget(FIND_SOURCES) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target.id);
		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;
			}
		}) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target.id);
		if (this.moveToTarget() == OK) {
			this.transfer(target, RESOURCE_ENERGY);
			this.toggleChargeMode();
		}
	}

	upgradeRoom() {
		if (this.findTarget(FIND_MY_STRUCTURES, {
			filter: (s) => {
				return s.structureType == STRUCTURE_CONTROLLER;
			}
		}) == ERR_NOT_FOUND) return;
		const target = Game.getObjectById(this.memory.target.id);
		if (this.moveToTarget() == OK) {
			this.upgradeController();
			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();
		}
	}

	// Moves to the target.
	moveToTarget() {
		if (this.pos.inRangeTo(this.memory.target.pos.x, this.memory.target.pos.y, 1)) {
			this.memory.path = undefined;
			return OK;
		}
		if (this.memory.path == undefined) {
			var path = this.pos.findPathTo(this.memory.target.pos, {
				ignoreCreeps: true, range: 1
			});
			path.reverse();
			this.memory.path = path;
		}
		const step = this.memory.path.pop();
		var response = this.move(step.direction);
		if (response == OK) {
			if (this.pos.x == step.x &&
				this.pos.y == step.y) return ERR_BUSY;
			response = this.moveTo(this.memory.target.pos.x, this.memory.target.pos.y);
		}
		if (response == OK || response == ERR_INVALID_ARGS || response == ERR_NOT_FOUND) {
			this.memory.path = undefined;
			return ERR_BUSY;
		}
		this.memory.path.push(step);
	}
}