import { statSync } from "fs";
import { Dispatch } from "./Dispatch";
import { ILogItem } from "./ILogItem";

export class SmartDispatch extends Dispatch {
  process(item: ILogItem) {
    let err = new Error();
    // we need to look through the stack and keep track of intermediate dispatches
    let stack = err.stack!.split("\n");
    let i = 0;
    while (!stack[i].includes("at SmartDispatch.process")) i++;

    let src = stack[i + 2].trim();
    let path = null;

    // now we need to format the src (at ...:..:.. or at App.<anonymous> ..., etc)
    if (src.includes("at ")) src = src.split("at ")[1];
    if (src.includes(" (")) src = src.split(" (")[1];
    if (src.includes(")")) src = src.split(")")[0];

    let file = {
      path: src.split(":")[0],
      line: src.split(":")[1],
      column: src.split(":")[2],
    };

    try {
      path = statSync(file.path).isFile() ? file.path : null;
    } catch (e) {
      path = null;
    }

    if (path) {
      // trim the path to the project root
      if (path.startsWith(process.cwd()))
        path = "." + path.slice(process.cwd().length);
      src = `${path}:${file.line}:${file.column}`;
    }
    super.process({
      ...item,
      origin: src,
    });
  }
}