import {UrlArgs} from "~/types/interfaces";
import {QUERY_TYPE} from "~/types/enums";
import {Context} from "@nuxt/types/app";
import {Model} from "@vuex-orm/core";

class ConstructUrl{
  static ROOT = '/api/'

  private ctx !: Context

  constructor(ctx: Context) {
    this.ctx = ctx
  }

  invoke(args:UrlArgs): string{
    switch (args.type) {
      case QUERY_TYPE.DEFAULT:
        return this.getDefaultUrl(args.url)

      case QUERY_TYPE.ENUM:
        return this.getEnumUrl(args.enumType)

      case QUERY_TYPE.MODEL:
        return this.getModelUrl(args.model, args.root_model, args.root_id)

      default:
        throw new Error('url, model or enum must be defined');
    }
  }

  private getDefaultUrl(url?: string){
    if(typeof url === 'undefined')
      throw new Error('url must be defined');
    return String(ConstructUrl.ROOT + url).toString()
  }

  private getEnumUrl(enumType?: string){
    if(typeof enumType === 'undefined')
      throw new Error('enumType must be defined');
    return String(ConstructUrl.ROOT + 'enum/' + enumType).toString()
  }

  private getModelUrl(model ?: typeof Model, rootModel ?: typeof Model, rootId ?: number){
    if(typeof model === 'undefined')
      throw new Error('model must be defined');
    const repository = this.ctx.store.$repo(model);
    const entity = repository.getModel().$entity();

    if(typeof rootModel !== 'undefined'){
      if(typeof rootId === 'undefined')
        throw new Error('Root ID must be defined');

      const rootUrl = this.getModelUrl(rootModel) as string
      return String(`${rootUrl}/${rootId}/${entity}`).toString()
    }

    return String(ConstructUrl.ROOT  + entity).toString()
  }
}

export default ConstructUrl