## Compiles Nim bots before battle tests.
## config.nims in each bot dir already sets --path and --outdir, so we just
## run `nim c src/BotName.nim` from the bot dir and let config.nims do the rest.

import std/[os, osproc, streams, strformat, strutils, sequtils]

proc compileBots*(botDirs: seq[string]): seq[string] =
  ## Compiles each bot dir, returns absolute paths to compiled binaries.
  ## Raises on first compilation failure, message includes compiler output.
  for dir in botDirs:
    let absDir = absolutePath(dir)
    # Infer main source: src/<stem>.nim where stem = last path component
    # minus optional _garage suffix (e.g. OscillatorBot_garage → OscillatorBot)
    var stem = lastPathPart(absDir)
    if stem.endsWith("_garage"): stem = stem[0 ..< stem.len - "_garage".len]

    let srcFile = absDir / "src" / stem & ".nim"
    if not fileExists(srcFile):
      # Fall back: pick the first .nim in src/
      let candidates = toSeq(walkFiles(absDir / "src" / "*.nim"))
      if candidates.len == 0:
        raise newException(IOError, fmt"No .nim source found in {absDir}/src/")
      stem = splitFile(candidates[0]).name

    # ponytail: startProcess+streams for timeout; execCmdEx has no timeout param
    let p = startProcess("nim", workingDir = absDir,
                         args = ["c", fmt"src/{stem}.nim"],
                         options = {poUsePath, poStdErrToStdOut})
    let exitCode = waitForExit(p, timeout = 30_000)
    let output = p.outputStream.readAll()
    p.close()
    if exitCode != 0:
      raise newException(OSError,
        fmt"Compilation failed for {absDir}:{'\n'}{output}")

    result.add absDir / "out" / stem

when isMainModule:
  let botDir = currentSourcePath().parentDir().parentDir().parentDir() /
               "OscillatorBot_garage"
  echo "Compiling OscillatorBot from: ", botDir
  try:
    let bins = compileBots(@[botDir])
    echo "OK — binary: ", bins[0]
    doAssert fileExists(bins[0]), "binary not found after compile"
  except CatchableError as e:
    echo "FAIL: ", e.msg
    quit(1)