module.exports = {
    begin(creep){
        const jobMemory = creep.memory.job; 
        if(!jobMemory.harvesting) creep.memory.job.harvesting = false;
        if(!jobMemory.counter) creep.memory.job.counter = 0;
    },
    
    tick(creep){
        const jobMemory = creep.memory.job; 
        if(jobMemory.harvesting){
            const source = creep.pos.findClosestByRange(FIND_SOURCES);
            if(creep.pos.isNearTo(source)) creep.harvest(source);
            else creep.moveTo(source);
            if(!creep.store.getFreeCapacity(RESOURCE_ENERGY)) jobMemory.harvesting = false;
        } else{
            var target;
            switch (jobMemory.counter%3) {
                case 0: target = creep.room.controller; break;
                case 1: target = creep.pos.findClosestByRange(FIND_MY_STRUCTURES, {filter:{structureType:STRUCTURE_SPAWN}}); break;
                case 2: target = creep.pos.findClosestByRange(FIND_MY_CONSTRUCTION_SITES); break;
            }           
            
            if(creep.pos.isNearTo(target)) {
                switch (jobMemory.counter%3) {
                    case 0: creep.upgradeController(target); break;
                    case 1: creep.transfer(target, RESOURCE_ENERGY); break;
                    case 2: creep.build(target); break;
                }
            }
            else creep.moveTo(target);
            if(!creep.store.getUsedCapacity(RESOURCE_ENERGY)) {
                jobMemory.harvesting = true;
                creep.memory.job.counter += 1;
            }
        }
    }
}