const consts = {
  FINISHED: 1,
  HARVESTING: 2,
  CONTINUE_ACTIVITY: 3,
}
global.costMatrices = {}

module.exports = {
  consts,
  findWalkablePath (from, goals, opts) {
    let roomCallback = roomName => {
      if (costMatrices[roomName] || Game.time % 500 === 0) {
        return costMatrices[roomName]
      }
      let room = Game.rooms[roomName];
      // In this example `room` will always exist, but since
      // PathFinder supports searches which span multiple rooms
      // you should be careful!
      if (!room) return;
      let costs = new PathFinder.CostMatrix;

      room.find(FIND_STRUCTURES).forEach(function(struct) {
        if (struct.structureType === STRUCTURE_ROAD) {
          // Favor roads over plain tiles
          costs.set(struct.pos.x, struct.pos.y, 1);
        } else if (struct.structureType !== STRUCTURE_CONTAINER &&
            (struct.structureType !== STRUCTURE_RAMPART ||
                !struct.my)) {
          // Can't walk through non-walkable buildings
          costs.set(struct.pos.x, struct.pos.y, 0xff);
        }
      });

      costMatrices[roomName] = costs
      return costs
    }
    return PathFinder.search(from, goals, Object.assign({roomCallback}, opts))
  },
  harvestEnergy (creep) {
    if (!creep.memory.harvestingEnergy && creep.store[RESOURCE_ENERGY] > 0) {
      return consts.CONTINUE_ACTIVITY
    }
    creep.memory.harvestingEnergy = creep.store.getFreeCapacity() > 0
    if (!creep.memory.harvestingEnergy) {
      return consts.FINISHED
    }
    // if (creep.store[RESOURCE_ENERGY] === 0) {
    //  creep.say('🔄 fetch');
    // }
    let target
    if (!target) {
      target = creep.pos.findClosestByRange(FIND_STRUCTURES, {
        filter: s => (s.structureType === STRUCTURE_CONTAINER || s.structureType === STRUCTURE_STORAGE)
            && s.store[RESOURCE_ENERGY] >= creep.store.getFreeCapacity(RESOURCE_ENERGY)
      });
    }
    if(target) {
      let result = creep.withdraw(target, RESOURCE_ENERGY)
      if (result === ERR_NOT_IN_RANGE) {
        creep.moveTo(target, {visualizePathStyle: {stroke: '#ffaa00'}});
      }
      else if (result === OK) {
        return consts.FINISHED
      }
    }
    else {
      let target = creep.pos.findClosestByRange(FIND_MY_CREEPS, {
        filter: creep => creep.memory.role === 'harvester' && creep.store[RESOURCE_ENERGY] > 0
      });
      if (target) {
        creep.moveTo(target, {visualizePathStyle: {stroke: '#ffaa00'}});
      }
    }
    return consts.HARVESTING
  }
}