#!/usr/bin/env bash
# Focused fixtures for the shared local/CI design-amendment gate.
set -euo pipefail
root=$(cd "$(dirname "$0")/.." && pwd)
gate="$root/tools/design_amendment_gate.sh"
tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT

mkdir -p "$tmp/tools" "$tmp/crates/game" "$tmp/wiki/process"
cp "$gate" "$tmp/tools/design_amendment_gate.sh"
cat > "$tmp/crates/game/lib.rs" <<'EOF'
pub fn live() {}
EOF
cat > "$tmp/wiki/process/law.md" <<'EOF'
# Law
Type: law
EOF
cat > "$tmp/wiki/process/knowledge.md" <<'EOF'
# Notes
Type: knowledge
EOF
git -C "$tmp" init -q
git -C "$tmp" add tools crates wiki
git -C "$tmp" -c user.email=fixture@example.invalid -c user.name=Fixture commit -qm base

expect_pass() {
  local name="$1" paths="$2" mode="${3:---worktree}"
  if ! printf '%s\n' "$paths" | (cd "$tmp" && bash tools/design_amendment_gate.sh "$mode") >/dev/null 2>&1; then
    echo "FAIL: $name"
    exit 1
  fi
  echo "  ok passes: $name"
}

expect_fail() {
  local name="$1" paths="$2" mode="${3:---worktree}"
  if printf '%s\n' "$paths" | (cd "$tmp" && bash tools/design_amendment_gate.sh "$mode") >/dev/null 2>&1; then
    echo "FAIL: $name"
    exit 1
  fi
  echo "  ok rejects: $name"
}

expect_pass "non-source change" "README.md"
expect_pass "source with binding amendment" $'crates/game/lib.rs\nwiki/process/law.md'
expect_fail "source without amendment" "crates/game/lib.rs"
expect_fail "knowledge page does not count" $'crates/game/lib.rs\nwiki/process/knowledge.md'
expect_fail "root doorway does not count" $'src/lib.rs\nDESIGN.md'

# The index mode must read the staged snapshot. An unstaged rewrite of the law
# into knowledge must not make a correctly staged binding amendment fail.
printf '\nAmendment.\n' >> "$tmp/wiki/process/law.md"
git -C "$tmp" add wiki/process/law.md
cat > "$tmp/wiki/process/law.md" <<'EOF'
# Unstaged replacement
Type: knowledge
EOF
expect_pass "index reads staged binding type" $'crates/game/lib.rs\nwiki/process/law.md' --index

# A large binding page with its Type header near the top must not fail under
# `set -o pipefail` when the matcher exits before a staged blob finishes
# streaming. This reproduces the old `git show | grep -q` SIGPIPE boundary.
{
  printf '# Large spec\nType: spec\n'
  for ((i = 0; i < 20000; i++)); do
    printf 'binding detail %05d\n' "$i"
  done
} > "$tmp/wiki/process/large.md"
git -C "$tmp" add wiki/process/large.md
expect_pass "large staged binding page" $'crates/game/lib.rs\nwiki/process/large.md' --index

# Conversely, a staged deletion is not an amendment merely because an
# unstaged file with the same path exists in the worktree.
git -C "$tmp" rm --cached -fq wiki/process/law.md
expect_fail "staged binding deletion does not count" $'crates/game/lib.rs\nwiki/process/law.md' --index

expect_fail "source deletion still requires amendment" "crates/game/lib.rs"

echo "Design amendment gate fixtures: OK"