#!/usr/bin/env bash
# Check the export against MODDING.md's five rules.
#
#   tools/port/check-modding
#
# `MODDING.md` opens by saying modding is a requirement and **a constraint on the
# exporter today, not a later feature**. Nothing checked it. That is the shape
# this port keeps finding: a rule stated, believed, and unexercised -- the black
# hold implemented and never called, `ScreenView.skipped` written and never read,
# `stop_bed` provided and never used, `--focus` parsed and overwritten.
#
# So this is a guard, not a fix: every rule passes as of 2026-08-30. Its value is
# that the next thing to break one of them says so.
#
# ⚠️ What it CANNOT check: rule 3's "modern, editable" is enforced by extension,
# which cannot tell a valid PNG from a renamed one, and rule 1's "one logical
# asset" is checked as one-file-per-reference -- an exporter that split a sprite
# and referenced both halves would pass. These are the rules' checkable shadows.
set -euo pipefail
cd "${PROJECT_DIR:-/work}"
EXPORT="${EXPORT:-export}"
fail=0
note() { printf '  %-6s %s\n' "$1" "$2"; [ "$1" = FAIL ] && fail=1 || true; }

echo "MODDING rule 1 -- one logical asset, one file"
python3 - "$EXPORT" <<'PY'
import json, glob, os, sys
E = sys.argv[1]
ref = set()
for p in glob.glob(f"{E}/screens/*/*.json"):
    d = json.load(open(p))
    for e in d["elements"]:
        for k in ("sprite", "focus_sprite"):
            if e.get(k): ref.add(e[k])
        for sub in ("focus", "leaf"):
            for fe in (e.get(sub) or {}).get("elements", []):
                if fe.get("sprite"): ref.add(fe["sprite"])
files = {os.path.relpath(p, E) for p in glob.glob(f"{E}/sprites/**/*.png", recursive=True)}
missing, orphan = sorted(ref - files), sorted(files - ref)
split = [f for f in files if any(t in os.path.basename(f) for t in ("part", "seg", "chunk"))]
print("  %-6s %d sprites referenced, %d present" % ("OK" if not (missing or orphan) else "FAIL", len(ref), len(files)))
if missing: print("  FAIL   referenced but absent:", missing[:5])
if orphan:  print("  FAIL   present but unreferenced:", orphan[:5])
if split:   print("  FAIL   split-looking names:", split[:5])
sys.exit(1 if (missing or orphan or split) else 0)
PY
[ $? -eq 0 ] || fail=1

echo "MODDING rule 2 -- names a person recognises"
hex=$(find "$EXPORT" -type f | grep -Ec '0x[0-9a-f]{6,}|/[0-9a-f]{8}\.' || true)
[ "$hex" -eq 0 ] && note OK "no hex or hash-shaped filenames" || note FAIL "$hex hash-shaped names"

echo "MODDING rule 3 -- modern, editable formats only"
bad=$(find "$EXPORT" -type f | sed 's/.*\.//' | sort -u | grep -vE '^(json|png|ogg|ogv|cmd)$' || true)
[ -z "$bad" ] && note OK "only json/png/ogg/ogv (+ .cmd sidecars)" || note FAIL "unexpected: $(echo $bad)"
# A `.cmd` is not an asset. It is allowed only because it SAYS SO in its own
# first line -- see video.rs. An unlabelled one reads as something to edit.
for c in $(find "$EXPORT" -name '*.cmd'); do
  head -1 "$c" | grep -q '^# Generated by sylpheed-export' \
    && note OK "$(basename "$c") is self-describing" \
    || note FAIL "$(basename "$c") has no header saying what it is"
done

echo "MODDING rule 4 -- base and overrides, never one merged pile"
grep -q 'data/mods' .gitignore && note OK "data/mods contents are gitignored" \
  || note FAIL "data/mods is not gitignored -- a mod is usually a game asset"
grep -rq 'data/mods' crates/sylpheed-export/src/ && note OK "the exporter resolves overrides" \
  || note FAIL "nothing reads data/mods"

echo "MODDING rule 5 -- provenance in every generated file"
python3 - "$EXPORT" <<'PY'
import json, glob, os, sys
E = sys.argv[1]; miss = []
for p in sorted(glob.glob(f"{E}/**/*.json", recursive=True)):
    d = json.load(open(p))
    if os.path.basename(p) == "manifest.json":
        # The manifest is the provenance -- it carries disc, exporter and the
        # formats revision for the whole tree, so it has no `source` of its own.
        if not all(k in d for k in ("disc", "exporter", "formats_rev")): miss.append(p)
        continue
    src = d.get("source") or {}
    if not (isinstance(src, dict) and src): miss.append(p)
print("  %-6s %d json files carry provenance" % ("OK" if not miss else "FAIL",
      len(glob.glob(f"{E}/**/*.json", recursive=True)) - len(miss)))
for m in miss[:5]: print("  FAIL  ", m)
sys.exit(1 if miss else 0)
PY
[ $? -eq 0 ] || fail=1

echo
[ $fail -eq 0 ] && echo "all five rules pass" || echo "🔴 a MODDING rule is broken"
exit $fail