#!/usr/bin/env bash
# Pre-commit hook: format check + integration tests for the czsplicer CLI.
# Install (from repo root):  git config core.hooksPath hooks
#   or:  cp hooks/pre-commit .git/hooks/pre-commit && chmod +x .git/hooks/pre-commit
set -euo pipefail

# Resolve repo root regardless of where the hook was invoked from.
REPO_ROOT="$(git rev-parse --show-toplevel)"
cd "$REPO_ROOT"

# Only run if Rust sources / manifests changed in this commit.
if ! git diff --cached --name-only --diff-filter=ACMR | grep -qE '\.(rs|toml)$|^tests/'; then
    echo "[pre-commit] no Rust changes staged, skipping"
    exit 0
fi

if ! command -v cargo >/dev/null 2>&1; then
    echo "[pre-commit] cargo not found; skipping checks" >&2
    exit 0
fi

echo "[pre-commit] cargo fmt --check"
if ! cargo fmt --check; then
    echo "[pre-commit] formatting issues found — run 'cargo fmt' and re-stage" >&2
    exit 1
fi

echo "[pre-commit] cargo clippy -- -D warnings"
if ! cargo clippy --quiet -- -D warnings; then
    echo "[pre-commit] clippy lint warnings found" >&2
    exit 1
fi

echo "[pre-commit] cargo test"
if ! cargo test --quiet; then
    echo "[pre-commit] tests failed" >&2
    exit 1
fi

echo "[pre-commit] OK"