#!/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)

# --no-cov: a subset cannot meet the 100% bar, and the term-missing table is noise.
pytest_run() {
    local py=python3
    [[ -x .venv/bin/python ]] && py=.venv/bin/python
    "$py" -m pytest --no-cov -p no:sugar "$@"
}

# Dart changes map to app/test/<name>_test.dart; any other app/ change runs the app suite.
flutter_run() {
    (cd app && flutter test --reporter=compact "$@")
}

if grep -qs testmon pyproject.toml requirements*.txt; then
    pytest_run --testmon -q --tb=short; exit $?
fi

full=0
tests=()
dart_tests=()
dart_full=0
for f in "${CHANGED[@]}"; do
    case "$f" in
        */conftest.py | conftest.py | pyproject.toml | requirements*.txt | pytest.ini | setup.cfg) full=1 ;;
        app/test/*_test.dart) dart_tests+=("${f#app/}") ;;
        app/lib/*.dart)
            base="$(basename "$f" .dart)"
            while IFS= read -r t; do dart_tests+=("${t#app/}"); done \
                < <(git ls-files "app/test/*${base}_test.dart")
            [[ ${#dart_tests[@]} -eq 0 ]] && dart_full=1
            ;;
        app/pubspec.yaml | app/pubspec.lock) dart_full=1 ;;
        *.py)
            base="$(basename "$f" .py)"
            if [[ "$base" == test_* || "$base" == *_test ]]; then
                tests+=("$f")
            else
                while IFS= read -r t; do tests+=("$t"); done \
                    < <(git ls-files "*test_${base}.py" "*${base}_test.py")
            fi
            ;;
    esac
done

if [[ ${#CHANGED[@]} -eq 0 ]]; then echo "no changes vs HEAD: nothing to test"; exit 0; fi
rc=0
if [[ $dart_full -eq 1 ]]; then flutter_run || rc=1
elif [[ ${#dart_tests[@]} -gt 0 ]]; then flutter_run "${dart_tests[@]}" || rc=1; fi
if [[ $full -eq 1 ]]; then
    echo "config changed: running full python suite"; pytest_run -q -n auto || rc=1
elif [[ ${#tests[@]} -gt 0 ]]; then pytest_run -q --tb=short "${tests[@]}" || rc=1
elif printf '%s\n' "${CHANGED[@]}" | grep -q '\.py$'; then
    echo "no mapped python tests: running full python suite"; pytest_run -q -n auto --tb=short || rc=1
elif [[ $dart_full -eq 0 && ${#dart_tests[@]} -eq 0 ]]; then
    echo "no python/dart changes: nothing to test"
fi
exit "$rc"