#!/bin/sh
set -eu

ROOT_DIR=$(git rev-parse --show-toplevel)
cd "$ROOT_DIR"

TMP_DIR=${TMPDIR:-/tmp}/nex-hooks-test.$$
mkdir -p "$TMP_DIR"

cleanup() {
  rm -f \
    backend/pkg/buildinfo/hook_bad_test_fixture.go \
    frontend/src/hook_bad_fixture.ts \
    frontend/src/hook_format_fixture.ts \
    docs/hook-doc-fixture.md \
    docs/hook-conflict-fixture.md \
    docs/hook-large-fixture.txt
  rm -rf "$TMP_DIR"
}

trap cleanup EXIT HUP INT TERM

pass() {
  printf 'OK: %s\n' "$1"
}

fail() {
  printf 'FAIL: %s\n' "$1" >&2
  exit 1
}

write_msg() {
  file=$1
  shift
  printf '%s\n' "$*" > "$file"
}

expect_success() {
  name=$1
  shift
  if "$@" > "$TMP_DIR/out" 2>&1; then
    pass "$name"
  else
    cat "$TMP_DIR/out" >&2
    fail "$name"
  fi
}

expect_failure() {
  name=$1
  shift
  if "$@" > "$TMP_DIR/out" 2>&1; then
    cat "$TMP_DIR/out" >&2
    fail "$name"
  fi
  pass "$name"
}

run_precommit_for() {
  index=$TMP_DIR/index
  rm -f "$index"
  GIT_INDEX_FILE=$index git read-tree HEAD
  for file in "$@"; do
    GIT_INDEX_FILE=$index git add -f "$file"
  done
  GIT_INDEX_FILE=$index make _hooks-pre-commit
}

MSG_FILE=$TMP_DIR/commit-msg.txt
write_msg "$MSG_FILE" 'feat: 添加 hook 测试'
expect_success 'commit-msg accepts Chinese description' scripts/git-hooks/commit-msg "$MSG_FILE"

write_msg "$MSG_FILE" 'feat: add hook tests'
expect_failure 'commit-msg rejects English-only description' scripts/git-hooks/commit-msg "$MSG_FILE"

write_msg "$MSG_FILE" 'update: 添加 hook 测试'
expect_failure 'commit-msg rejects invalid type' scripts/git-hooks/commit-msg "$MSG_FILE"

write_msg "$MSG_FILE" 'Merge branch feature'
expect_success 'commit-msg accepts merge commits' scripts/git-hooks/commit-msg "$MSG_FILE"

cat > backend/pkg/buildinfo/hook_bad_test_fixture.go <<'EOF'
package buildinfo

import "fmt"

func hookBadTestFixture() {
	fmt.Println("bad")
}
EOF
expect_failure 'pre-commit rejects Go lint errors' run_precommit_for backend/pkg/buildinfo/hook_bad_test_fixture.go
rm -f backend/pkg/buildinfo/hook_bad_test_fixture.go

cat > frontend/src/hook_bad_fixture.ts <<'EOF'
console.log('bad')
EOF
expect_failure 'pre-commit rejects frontend lint errors' run_precommit_for frontend/src/hook_bad_fixture.ts
rm -f frontend/src/hook_bad_fixture.ts

cat > frontend/src/hook_format_fixture.ts <<'EOF'
const hookFormatFixture={foo:"bar"}
export { hookFormatFixture }
EOF
expect_failure 'pre-commit rejects frontend format errors' run_precommit_for frontend/src/hook_format_fixture.ts
rm -f frontend/src/hook_format_fixture.ts

cat > docs/hook-doc-fixture.md <<'EOF'
hook doc fixture
EOF
expect_success 'pre-commit skips non-code staged files' run_precommit_for docs/hook-doc-fixture.md
rm -f docs/hook-doc-fixture.md

cat > docs/hook-conflict-fixture.md <<'EOF'
<<<<<<< HEAD
conflict
=======
other
>>>>>>> branch
EOF
expect_failure 'pre-commit rejects conflict markers' run_precommit_for docs/hook-conflict-fixture.md
rm -f docs/hook-conflict-fixture.md

i=0
while [ "$i" -lt 40000 ]; do
  printf 'large hook fixture line\n'
  i=$((i + 1))
done > docs/hook-large-fixture.txt
if run_precommit_for docs/hook-large-fixture.txt > "$TMP_DIR/out" 2>&1 && grep -q 'Warning: large staged text file' "$TMP_DIR/out"; then
  pass 'pre-commit warns for large text files'
else
  cat "$TMP_DIR/out" >&2
  fail 'pre-commit warns for large text files'
fi
rm -f docs/hook-large-fixture.txt