#!/usr/bin/env bash
# Gate a bundled release on the committed game C being present and clean.
#
# Releases ship a compiled game: CI builds from the generated/ tree the title
# COMMITS, so a checkout missing it (or carrying the wrong marker name) must
# fail here, at the top of the job, not twenty minutes later at link -- and
# never on a player's machine, which is where the old setup-host model put
# every failure of this kind.
#
# Asserts, from the game repo root:
#   1. generated/<boot>_dispatch.c exists, where <boot> is the boot-EXE name
#      game.toml declares (the same name check_boot_exe.sh cross-checks), and
#      at least one generated/<boot>_full*.c shard sits beside it.
#   2. Those files are tracked by git. An untracked generated/ builds fine on
#      the developer's machine and is absent from every CI checkout, which is
#      the exact gap between "works for me" and a red release.
#   3. The framework's tracked BIOS backend is present and tracked in the
#      submodule (psxrecomp/generated/OpenBIOS_{full,dispatch}.c with its
#      .emitter.sha stamp). runtime.cmake's fingerprint check
#      (PSXRECOMP_BIOS_STALE_FATAL in CI) refuses a stale stamp.
#      SCPH1001 is local-only since #575 (generated from the developer's own
#      dump, untracked): if present it must be complete; if absent it is
#      skipped with a note.
#   4. No BIOS dump is tracked (SCPH*.BIN / *.bin under bios/) in the title or
#      the submodule.
#
# Usage: check_generated.sh [--root DIR]    (default: cwd)
# Runs on bash 3.2+ (macOS runners).
set -euo pipefail

ROOT="${PWD}"
while [[ $# -gt 0 ]]; do
  case "$1" in
    --root) ROOT="${2:?}"; shift 2 ;;
    -h|--help)
      sed -n '2,25p' "$0" | sed 's/^# \{0,1\}//'
      exit 0
      ;;
    *)
      echo "error: unknown arg: $1" >&2
      exit 2
      ;;
  esac
done
ROOT="$(cd "${ROOT}" && pwd)"

toml_get() { # <section> <key> -- first quoted value of key inside [section]
  awk -v sec="$1" -v key="$2" '
    /^[[:space:]]*\[/ { in_sec = ($0 ~ ("^[[:space:]]*\\[" sec "\\]")) }
    in_sec && $0 ~ ("^[[:space:]]*" key "[[:space:]]*=") {
      if (match($0, /"[^"]*"/)) { print substr($0, RSTART + 1, RLENGTH - 2) }
      exit
    }' "${ROOT}/game.toml"
}

fail() { echo "error: $*" >&2; exit 1; }

[[ -f "${ROOT}/game.toml" ]] || fail "${ROOT}/game.toml missing -- not a game repo root"

boot="$(toml_get prepare_disc boot_exe || true)"
if [[ -z "${boot}" ]]; then
  exe="$(toml_get game exe || true)"
  boot="${exe##*/}"
fi
if [[ -z "${boot}" && -f "${ROOT}/CMakeLists.txt" ]]; then
  boot="$(sed -n 's/.*GEN_MARKER[[:space:]]*"generated\/\(.*\)_dispatch\.c".*/\1/p' \
    "${ROOT}/CMakeLists.txt" | head -n1)"
fi
[[ -n "${boot}" ]] || fail "cannot determine the boot-EXE name (game.toml [prepare_disc] boot_exe / [game] exe, or CMakeLists GEN_MARKER)"

gen="${ROOT}/generated"
dispatch="${gen}/${boot}_dispatch.c"

if [[ ! -f "${dispatch}" ]]; then
  echo "error: ${dispatch#"${ROOT}"/} is missing." >&2
  echo "  Bundled releases build from COMMITTED game C. Generate it once from a" >&2
  echo "  legal disc and commit generated/:" >&2
  echo "    python3 psxrecomp/psxrecomp_cli.py generate --config game.toml \\" >&2
  echo "        --project-root . --disc disc/<game>.cue" >&2
  echo "    git add generated && git commit -m 'Add generated game C'" >&2
  if grep -qE '^/?generated/?[[:space:]]*$' "${ROOT}/.gitignore" 2>/dev/null; then
    echo "  .gitignore still ignores generated/ (the old setup-host rule) -- remove" >&2
    echo "  that line; see psxrecomp/docs/ci/templates/game.gitignore." >&2
  fi
  exit 1
fi

shards=0
for f in "${gen}/${boot}_full"*.c; do
  [[ -f "${f}" ]] && shards=$((shards + 1))
done
[[ "${shards}" -gt 0 ]] || fail "no generated/${boot}_full*.c beside ${boot}_dispatch.c -- regenerate"

# 2. Tracked, not merely present.
if git -C "${ROOT}" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  untracked="$(git -C "${ROOT}" ls-files --others --exclude-standard -- "generated/${boot}_dispatch.c" "generated/${boot}_full"*.c 2>/dev/null || true)"
  ignored="$(git -C "${ROOT}" ls-files --others --ignored --exclude-standard -- "generated/${boot}_dispatch.c" "generated/${boot}_full"*.c 2>/dev/null || true)"
  if [[ -n "${untracked}${ignored}" ]]; then
    echo "error: generated game C is present but NOT tracked by git:" >&2
    printf '%s\n' ${untracked} ${ignored} | sed 's/^/  /' >&2
    echo "  A release builds from the checkout, so these files never reach CI." >&2
    echo "  Remove any /generated/ rule from .gitignore, then: git add generated" >&2
    exit 1
  fi
fi

# 3. The framework's committed BIOS backends.
fw="${ROOT}/psxrecomp"
if [[ -d "${fw}" ]]; then
  for f in generated/OpenBIOS_full.c generated/OpenBIOS_dispatch.c generated/OpenBIOS.emitter.sha; do
    if [[ ! -f "${fw}/${f}" ]]; then
      echo "error: psxrecomp/${f} is missing -- the framework commits its OpenBIOS backend;" >&2
      echo "  this submodule pin predates that, or the checkout is not --recurse-submodules." >&2
      exit 1
    fi
    if git -C "${fw}" rev-parse --is-inside-work-tree >/dev/null 2>&1 &&
       ! git -C "${fw}" ls-files --error-unmatch -- "${f}" >/dev/null 2>&1; then
      echo "error: psxrecomp/${f} exists but is not tracked in the framework submodule." >&2
      exit 1
    fi
  done
  # SCPH1001: optional, local-only (psxrecomp #575). Partial output is an error.
  scph_have=0
  for f in generated/SCPH1001_full.c generated/SCPH1001_dispatch.c generated/SCPH1001.emitter.sha; do
    [[ -f "${fw}/${f}" ]] && scph_have=$((scph_have + 1))
  done
  if [[ "${scph_have}" -eq 3 ]]; then
    scph_note="SCPH1001 backend present (local)"
  elif [[ "${scph_have}" -eq 0 ]]; then
    scph_note="SCPH1001 backend absent (local-only, skipped)"
    echo "note: psxrecomp/generated/SCPH1001_* absent -- local-only since #575; skipped." >&2
  else
    fail "psxrecomp/generated/SCPH1001_* is incomplete (${scph_have}/3 files) -- regenerate with tools/regen_bios.sh --config bios/SCPH1001.toml or remove them"
  fi
fi

# 4. No BIOS dump tracked, in the title or the submodule.
for repo in "${ROOT}" "${fw}"; do
  [[ -d "${repo}" ]] || continue
  if git -C "${repo}" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    dumps="$(git -C "${repo}" ls-files -- 'bios/*' '*.BIN' 'SCPH*' 2>/dev/null \
      | grep -Ei '\.(bin|rom)$' | grep -v -i 'openbios' || true)"
    if [[ -n "${dumps}" ]]; then
      echo "error: BIOS image(s) tracked in ${repo#"${ROOT}"}:" >&2
      printf '%s\n' "${dumps}" | sed 's/^/  /' >&2
      exit 1
    fi
  fi
done

echo "generated C ok: generated/${boot}_dispatch.c + ${shards} full shard(s) tracked; OpenBIOS backend tracked; ${scph_note:-no framework submodule}; no BIOS dump tracked"