#!/bin/bash

# ============================================================================
# Run only the tests related to files changed vs HEAD (staged, unstaged and
# untracked). Quiet: failures plus a one-line summary. Falls back to the full
# suite when a change cannot be mapped to tests. Generated by repo_contract.
# ============================================================================

set -euo pipefail

cd "$(git rev-parse --show-toplevel)"
CHANGED=()
while IFS= read -r f; do
    [[ -n "$f" && -e "$f" ]] && CHANGED+=("$f")
done < <({ git diff --name-only HEAD 2>/dev/null || true; git ls-files --others --exclude-standard; } | sort -u)

full=0
tests=()
for f in "${CHANGED[@]}"; do
    case "$f" in
        pubspec.yaml | pubspec.lock | test/flutter_test_config.dart) full=1 ;;
        test/*_test.dart) tests+=("$f") ;;
        lib/*.dart)
            rel="${f#lib/}"
            if [[ -f "test/${rel%.dart}_test.dart" ]]; then
                tests+=("test/${rel%.dart}_test.dart")
            else
                while IFS= read -r t; do tests+=("$t"); done \
                    < <(git ls-files "test/*$(basename "${f%.dart}")_test.dart")
            fi
            ;;
    esac
done

if [[ $full -eq 0 && ${#CHANGED[@]} -eq 0 ]]; then echo "no changes vs HEAD: nothing to test"; exit 0; fi
if [[ $full -eq 0 && ${#tests[@]} -gt 0 ]]; then flutter test --reporter=compact "${tests[@]}"; exit $?; fi
if [[ $full -eq 0 ]] && ! printf '%s\n' "${CHANGED[@]}" | grep -q '\.dart$'; then
    echo "no dart changes: nothing to test"; exit 0
fi
echo "no mapped tests: running full suite"
flutter test --reporter=compact