#!/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 \
    "$TMP_DIR/lfs-pointer-fixture" \
    "$TMP_DIR/lfs-bad-fixture"
  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"
}

write_conflict() {
  file=$1
  less7=$(printf '<%.0s' $(seq 7))
  eq7=$(printf '=%.0s' $(seq 7))
  gt7=$(printf '>%.0s' $(seq 7))
  printf '%s\n' "${less7} HEAD" '' "${eq7}" '' "${gt7} branch" > "$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
}

run_hooks_install_missing_source() {
  install_repo=$TMP_DIR/hooks-install-missing
  rm -rf "$install_repo"
  mkdir -p "$install_repo/scripts/git-hooks"
  cp Makefile "$install_repo/Makefile"
  cp scripts/git-hooks/pre-commit "$install_repo/scripts/git-hooks/pre-commit"
  cp scripts/git-hooks/commit-msg "$install_repo/scripts/git-hooks/commit-msg"
  git -C "$install_repo" init >/dev/null 2>&1
  (cd "$install_repo" && make hooks-install)
}

MSG_FILE=$TMP_DIR/commit-msg.txt

# ============================================
# commit-msg 测试
# ============================================

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 "$MSG_FILE" 'feat: add hook tests'
expect_success 'commit-msg accepts English-only description without CJK enforcement' scripts/git-hooks/commit-msg "$MSG_FILE"

write_msg "$MSG_FILE" 'fix: 修复 auth 模块 bug'
expect_success 'commit-msg accepts Chinese with English technical terms' scripts/git-hooks/commit-msg "$MSG_FILE"

write_msg "$MSG_FILE" 'docs: ajouter une fonctionnalité'
expect_success 'commit-msg accepts non-CJK unicode description without CJK enforcement' scripts/git-hooks/commit-msg "$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"

write_msg "$MSG_FILE" 'feat: 添加新功能
'
expect_success 'commit-msg accepts single line with trailing newline' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加新功能\n\n详细描述内容\n' > "$MSG_FILE"
expect_success 'commit-msg accepts multi-line with blank line separator' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加新功能\n缺少空行\n详细描述\n' > "$MSG_FILE"
expect_failure 'commit-msg rejects multi-line without blank line separator' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加新功能\n\n' > "$MSG_FILE"
expect_success 'commit-msg accepts two lines with blank line 2' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加新功能\n非空行\n' > "$MSG_FILE"
expect_success 'commit-msg accepts two lines without body (no line 3)' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加模板测试\n# <类型>: <简短中文描述>\n#\n# <详细说明>\n' > "$MSG_FILE"
expect_success 'commit-msg ignores template comments after subject' scripts/git-hooks/commit-msg "$MSG_FILE"

printf '# <类型>: <简短中文描述>\n#\nfeat: 添加模板测试\n' > "$MSG_FILE"
expect_success 'commit-msg ignores leading template comments' scripts/git-hooks/commit-msg "$MSG_FILE"

printf 'feat: 添加新功能\n缺少空行\n# 模板注释\n详细描述\n' > "$MSG_FILE"
expect_failure 'commit-msg rejects non-blank separator with intervening comments' scripts/git-hooks/commit-msg "$MSG_FILE"

# ============================================
# prepare-commit-msg 测试
# ============================================

prepare_msg_file="$TMP_DIR/prepare-msg.txt"
rm -f "$prepare_msg_file"
touch "$prepare_msg_file"
expect_success 'prepare-commit-msg writes template for empty commit' scripts/git-hooks/prepare-commit-msg "$prepare_msg_file" ""

if grep -q '<类型>' "$prepare_msg_file" && grep -q 'feat / fix / refactor' "$prepare_msg_file"; then
  pass 'prepare-commit-msg template contains format guidance'
else
  fail 'prepare-commit-msg template contains format guidance'
fi

printf '\n# Please enter the commit message for your changes.\n# On branch main\n' > "$prepare_msg_file"
expect_success 'prepare-commit-msg writes template before git comments' scripts/git-hooks/prepare-commit-msg "$prepare_msg_file" ""
if grep -q '<类型>' "$prepare_msg_file" && grep -q 'Please enter the commit message' "$prepare_msg_file"; then
  pass 'prepare-commit-msg preserves git comments after template'
else
  fail 'prepare-commit-msg preserves git comments after template'
fi

write_msg "$prepare_msg_file" 'existing content'
expect_success 'prepare-commit-msg skips when file has content' scripts/git-hooks/prepare-commit-msg "$prepare_msg_file" ""
if printf '%s\n' "$(cat "$prepare_msg_file")" | grep -q '^existing content$'; then
  pass 'prepare-commit-msg does not overwrite existing content'
else
  fail 'prepare-commit-msg does not overwrite existing content'
fi

rm -f "$prepare_msg_file"
touch "$prepare_msg_file"
expect_success 'prepare-commit-msg skips for merge' scripts/git-hooks/prepare-commit-msg "$prepare_msg_file" "merge"
if [ ! -s "$prepare_msg_file" ]; then
  pass 'prepare-commit-msg skips template for merge'
else
  fail 'prepare-commit-msg skips template for merge'
fi

# ============================================
# hooks-install 测试
# ============================================

expect_failure 'hooks-install rejects missing source hook' run_hooks_install_missing_source

# ============================================
# pre-commit 测试
# ============================================

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 (delegated to _backend-lint)' 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 (delegated to _frontend-check)' 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 (delegated to _frontend-check)' 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

write_conflict docs/hook-conflict-fixture.md
expect_failure 'pre-commit rejects conflict markers' run_precommit_for docs/hook-conflict-fixture.md
rm -f docs/hook-conflict-fixture.md

index=$TMP_DIR/index
rm -f "$index"
GIT_INDEX_FILE=$index git read-tree HEAD
write_conflict "$TMP_DIR/hook-conflict-fixture.sh"
hash=$(git hash-object -w "$TMP_DIR/hook-conflict-fixture.sh")
rm -f "$TMP_DIR/hook-conflict-fixture.sh"
GIT_INDEX_FILE=$index git update-index --add --cacheinfo 100644 "$hash" "scripts/git-hooks/hook-conflict-fixture.sh"
expect_failure 'pre-commit rejects conflict markers in hook scripts' env GIT_INDEX_FILE=$index make _hooks-pre-commit

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

# LFS pointer 校验
lfs_pointer='version https://git-lfs.github.com/spec/v1
oid sha256:abc123
size 100
'
printf '%s\n' "$lfs_pointer" > "$TMP_DIR/lfs-pointer-fixture"
hash=$(git hash-object -w "$TMP_DIR/lfs-pointer-fixture")
index=$TMP_DIR/index
rm -f "$index"
GIT_INDEX_FILE=$index git read-tree HEAD
GIT_INDEX_FILE=$index git update-index --add --cacheinfo 100644 "$hash" "assets/test-lfs-fixture.png"
if GIT_INDEX_FILE=$index make _hooks-pre-commit > "$TMP_DIR/out" 2>&1; then
  pass 'pre-commit allows LFS pointer files'
else
  cat "$TMP_DIR/out" >&2
  fail 'pre-commit allows LFS pointer files'
fi

printf 'fake binary content\n' > "$TMP_DIR/lfs-bad-fixture"
hash=$(git hash-object -w "$TMP_DIR/lfs-bad-fixture")
rm -f "$index"
GIT_INDEX_FILE=$index git read-tree HEAD
GIT_INDEX_FILE=$index git update-index --add --cacheinfo 100644 "$hash" "assets/test-lfs-bad-fixture.png"
if GIT_INDEX_FILE=$index make _hooks-pre-commit > "$TMP_DIR/out" 2>&1; then
  cat "$TMP_DIR/out" >&2
  fail 'pre-commit rejects non-pointer LFS files'
fi
pass 'pre-commit rejects non-pointer LFS files'