import { object } from "zod";
import { Dispatch } from "./Dispatch";
import { ILogItem } from "./ILogItem";
import { LogLevel } from "./LogLevel";

export class FormattedDispatch extends Dispatch {
  private formatString: string = "%t %l <%o>: %m";
  private levelFixedLength = Object.keys(LogLevel).reduce((acc, cur) => cur.length > acc ? cur.length : acc, 0)

  private fmtPart(x: any) {
    switch (typeof x) {
      case "string":
      case "number":
        return x;
      case "object":
        return JSON.stringify(x, null, 2);
      default:
        return x;
    }
  }

  format(item: ILogItem): string {
    let data;

    // Array to string
    if (Array.isArray(item.data))
      data = item.data
        .map((item: any) => this.fmtPart(item))
        .join(" ");
    else data = this.fmtPart(item.data);


    return this.formatString
      .replace("%t", item.timestamp.toISOString())
      .replace("%l", LogLevel[item.level].padEnd(this.levelFixedLength))
      .replace("%o", item.origin || "")
      .replace(
        "%m",
        data);
  }

  process(item: ILogItem): void {
    if (item.flags?.includes("formatting:none")) return super.process(item);
    else if (item.flags?.includes("formatting:json_string")) return super.process({...item, data: JSON.stringify(item.data)});
    else if (item.flags?.includes("formatting:pretty_json_string")) return super.process({...item, data: JSON.stringify(item.data, null, 2)});
    super.process({
      ...item,
      data: this.format(item),
    });
  }
}