import { Colour } from './colour';
import { IColourMap } from './icolour-map';
import * as fs from 'fs';
import * as path from 'path';

export class ColoursFile {
  private colours: IColourMap;
  private dirname: string;
  private name: string;
  private output: string = '';
  private token: string = '\n\t/// content\n';

  constructor(name: string, dirname: string, colours: IColourMap) {
    this.colours = colours;
    this.dirname = dirname;
    this.name = name;
  }

  private addContent(content: string) {
    this.output = this.output.replace(this.token, `\n\t${content}${this.token}`);
  }

  private clearToken() {
    this.output = this.output.replace(this.token, '\n');
  }

  private templateDT(): string {
    return `declare module "${this.dirname.replace(`${process.cwd()}/d.ts`, 'ride-components')}dist/ts/colours/${this.name}" { ${this.token}}`;
  }

  private templateTS(): string {
    return `export namespace ${this.name} { ${this.token}}`;
  }

  public makeOutput(isDefinition?: boolean): void {
    let colours = this.colours[this.name];
    this.output = isDefinition ? this.templateDT() : this.templateTS();
    if (colours) {
      colours.forEach(colour => {
        this.addContent(
          isDefinition
          ? `export const ${colour.name}: string;`
          : `export const ${colour.name}: string = '${colour.value}';`);
      });
    }
  }

  public write(): void {
    fs.writeFileSync(path.join(this.dirname, `./${this.name}.ts`), this.toString());
  }

  public toString(): string {
    this.clearToken();
    return this.output;
  }
}