## Task 4: offline gun-range runner. Replays one or more fixtures through the
## 13 ModularBot guns and prints a deterministic per-gun table (overall hit rate
## plus per-power-bin hits/shots) for each fixture.
##
## Usage:
##   nim c -r common_libs/tests/run_range.nim                    # all tools/fixtures/*.jsonl
##   nim c -r common_libs/tests/run_range.nim path/a.jsonl path/b.jsonl
##   nim c -r common_libs/tests/run_range.nim --timing           # add per-fixture wall time
##
## Tsetlin is stochastic; it is seeded (seed=1) here so this tool's output is
## reproducible run-to-run. Its numbers are NOT expected to match a live battle.

import std/[os, algorithm, strformat, times]
import gun_harness/offline_range
import range_guns

const fixturesDir = currentSourcePath().parentDir.parentDir.parentDir / "tools" / "fixtures"

proc fixtureFiles(args: seq[string]): seq[string] =
  for a in args:
    if a == "--timing": continue
    if dirExists(a):
      for f in walkFiles(a / "*.jsonl"): result.add f
    elif fileExists(a):
      result.add a
    else:
      echo "warning: not found: ", a
  if result.len == 0:
    for f in walkFiles(fixturesDir / "*.jsonl"): result.add f
  result.sort()

proc main() =
  var args: seq[string]
  for i in 1..paramCount():
    args.add paramStr(i)
  let showTiming = "--timing" in args
  let files = fixtureFiles(args)
  if files.len == 0:
    echo "no fixtures found under ", fixturesDir
    echo "run: nim c -r common_libs/tests/gen_synthetic_fixtures.nim"
    quit(1)

  var grandShots, grandHits = 0
  for path in files:
    let fx = loadFixture(path)
    var t0 = 0.0
    if showTiming: t0 = epochTime()
    let reports = replayFixture(fx, buildAllGunDrivers(seed = 1),
                                liveActual = (fx.meta.source == "live"))
    let elapsed = if showTiming: epochTime() - t0 else: 0.0
    stdout.write formatReports(fx, reports)
    if showTiming:
      echo fmt"  replay: {elapsed*1000.0:.1f} ms"
    var totShots, totHits = 0
    for r in reports:
      totShots += r.shots
      totHits += r.hits
    grandShots += totShots
    grandHits += totHits
    echo ""
  if files.len > 1:
    echo fmt"TOTAL across {files.len} fixtures: {grandHits}/{grandShots} ({grandHits.float/grandShots.float*100.0:.1f}%)"
  echo fmt"(replayed {files.len} fixture(s))"

when isMainModule:
  main()