import {ConfigurationProvider} from "./ConfigurationProvider";
import {ConfigurationModel} from "../Database/Models/ConfigurationModel";
// @ts-expect-error set-path is provided
import setPath from 'object-path-set';
import deepmerge from "deepmerge";
// @ts-expect-error Any is fine
import {isPlainObject} from "is-plain-object";
import {Nullable} from "../types/Nullable";
import {ConfigurationTransformer, TransformerResults} from "./ConfigurationTransformer";
import _ from "lodash";

export enum PathConfigurationFrom {
  Database,
  Default
}

export type PathConfiguration = {
  value: TransformerResults,
  from: PathConfigurationFrom
}

export class ConfigurationHandler<
  TProviderModel extends ConfigurationModel = ConfigurationModel,
  TRuntimeConfiguration extends object = Record<string, string>,
> {
  public readonly transformer: ConfigurationTransformer
  
  constructor(
    private readonly provider: ConfigurationProvider<TProviderModel>
  ) {
    this.transformer = provider.getTransformer();
  }
  
  public save(path: string, value: string): void {
    const configuration = this.provider.get(path);
    
    if (configuration) {
      this.provider.save({
        ...configuration,
        value
      });
      
      return;
    }
    
    this.provider.save({
      key: path,
      value
    });
  }

  public getCompleteConfiguration(): TRuntimeConfiguration {
    return deepmerge(
      this.provider.defaults,
      this.getCompleteDatabaseConfig(),
      {
        isMergeableObject: isPlainObject
      }
    )
  }
  
  public getConfigurationByPath(path: string): PathConfiguration {
    const configuration = this.provider.get(path);
    if (!configuration) {
      return {
        value: _.get(this.provider.defaults, path, null),
        from: PathConfigurationFrom.Default
      };
    }
    
    return {
      value: this.transformer.getValue(configuration),
      from: PathConfigurationFrom.Database
    };
  }
  private getCompleteDatabaseConfig(): Partial<TRuntimeConfiguration> {
    const values = this.provider.getAll();
    const configuration: Partial<TRuntimeConfiguration> = {};

    values.forEach((configValue) => {
      const value = this.transformer.getValue(configValue);
      _.set(configuration, configValue.key, value);
    })

    return configuration;
  }
}