import parseArgs from 'minimist'
import type { ParsedArgs } from 'minimist'
import path from "node:path"
import { userInfo } from "node:os"

export function sum(xs: number[]): number {
  return xs.reduce((x, y) => x+y, 0)
}

let writtenHeader = false
export function csvOut(stuff: Record<string, number | string>) {
  function escape(x: number | string): string {
    if (typeof x === 'number') return "" + x
    return x.indexOf(",") !== -1 ? `"${x}"` : x
  }
  if (!writtenHeader) console.log(Object.keys(stuff).join(','))
  writtenHeader = true
  console.log(Object.values(stuff).map(escape).join(','))
}

export function jsonOut(stuff: any) {
  if (process.stdout.isTTY) console.dir(stuff, { depth: 10 })
   else console.log(JSON.stringify(stuff))
}

export function runCommands(commandBuilder: (argv: ParsedArgs) => Record<string, (...args: string[]) => (Promise<void> | void)>) {
  const argv = parseArgs(process.argv.slice(2))
  const commands = commandBuilder(argv)
  if (argv._.length < 1 || !commands[argv._[0]]) {
    console.log("Available commands:")
    for (const fn of Object.values(commands)) {
      const src = fn.toString().split('{')[0]
      console.log("-", src)
    }
  } else if (commands[argv._[0]]) {
    commands[argv._[0]](...argv._.slice(1))
  }
}
export function getXdgConfigHome() {
  return process.env.XDG_CONFIG_HOME
    ? process.env.XDG_CONFIG_HOME
    : process.env.HOME
      ? path.join(process.env.HOME, ".config")
      : path.join(userInfo().homedir, ".config")
}