var roleBuilder = require('role.builder');

var roleHarvester = {

    /** @param {Creep} creep **/
    run: function(creep) {
	    if(creep.store.getFreeCapacity() > 0) {
            var sources = creep.room.find(FIND_SOURCES);
            var t = creep.pos.findClosestByRange(sources)
            if(creep.harvest(t) == ERR_NOT_IN_RANGE) {
                creep.moveTo(t, {visualizePathStyle: {stroke: '#aaff00'}});
            }
        } else {
            // TODO spawn should be priotized
            var targets = creep.room.find(FIND_STRUCTURES, {
                    filter: (structure) => {
                        return (structure.structureType == STRUCTURE_EXTENSION ||
                                structure.structureType == STRUCTURE_SPAWN ||
                                structure.structureType == STRUCTURE_CONTAINER ||
                                structure.structureType == STRUCTURE_TOWER) && 
                                structure.store.getFreeCapacity(RESOURCE_ENERGY) > 0;
                    }
            });
            if(targets.length > 0) {
                var t = creep.pos.findClosestByRange(targets)
                if(creep.transfer(t, RESOURCE_ENERGY) == ERR_NOT_IN_RANGE) {
                    creep.moveTo(t, {visualizePathStyle: {stroke: '#ffffff'}});
                }
            } else { // no sturctures with free storage
                roleBuilder.run(creep);
            }
        }
	}
};

module.exports = roleHarvester;