import Component from '@/ecs/component.js';
import Script from '@/util/script.js';

export default class Plant extends Component {
  instanceFromSchema() {
    const {ecs} = this;
    const Instance = super.instanceFromSchema();
    return class PlantInstance extends Instance {
      mayGrow() {
        return this.mayGrowScriptInstance.evaluateSync();
      }
      grow() {
        const {Ticking} = ecs.get(this.entity);
        Ticking.addTickingPromise(this.growScriptInstance.tickingPromise());
      }
    };
  }
  async load(instance) {
    // heavy handed...
    if ('undefined' !== typeof window) {
      return;
    }
    const {readAsset} = this.ecs;
    await readAsset(instance.growScript)
      .then(async (code) => {
        if (code.byteLength > 0) {
          const context = {
            ecs: this.ecs,
            plant: instance,
          };
          instance.growScriptInstance = await Script.fromCode((new TextDecoder()).decode(code), context);
        }
      });
    await readAsset(instance.mayGrowScript)
      .then(async (code) => {
        if (code.byteLength > 0) {
          const context = {
            ecs: this.ecs,
            plant: instance,
          };
          instance.mayGrowScriptInstance = await Script.fromCode((new TextDecoder()).decode(code), context);
        }
      });
  }
  // heavy handed...
  markChange() {}
  static properties = {
    growScript: {type: 'string'},
    growth: {type: 'uint16'},
    growthFactor: {defaultValue: 127, type: 'uint8'},
    mayGrowScript: {type: 'string'},
    stage: {type: 'uint8'},
    stages: {
      type: 'array',
      subtype: {type: 'uint16'},
    },
  };
}