#!/usr/bin/env bash
# F∆I Platform — smoke tests for `tools/security/check-staged.sh`.
#
# Spins up an isolated tempdir per scenario, stages a tripwire,
# and asserts the security script either passes or fails with the
# expected violation string. Never touches the operator's repo.
#
# Run manually:
#   bash tools/security/test-check-staged.sh
#
# Wire into CI alongside the script-under-test if you want a
# second-line check that the rules themselves still trigger.

set -uo pipefail

SCRIPT="$(cd "$(dirname "$0")" && pwd)/check-staged.sh"
if [ ! -x "$SCRIPT" ]; then
    echo "FATAL: $SCRIPT not found or not executable" >&2
    exit 2
fi

PASS=0
FAIL=0

setup_repo() {
    local d
    d=$(mktemp -d -t fai_check_test.XXXXXX)
    (
        cd "$d"
        git init -q
        git config user.email t@t.local
        git config user.name "Test"
        git commit --allow-empty -m "init" -q
    )
    cp "$SCRIPT" "$d/check.sh"
    chmod +x "$d/check.sh"
    echo "$d"
}

# Args: label, expected-substring-in-stderr
assert_content_fails() {
    local label="$1" expected="$2"
    local out
    if out=$(./check.sh content 2>&1); then
        echo "  FAIL [$label]: expected fail, but passed"
        FAIL=$((FAIL + 1))
        return
    fi
    if echo "$out" | grep -q -F -- "$expected"; then
        echo "  PASS [$label]"
        PASS=$((PASS + 1))
    else
        echo "  FAIL [$label]: failed but did not mention '$expected'"
        echo "$out" | head -5 | sed 's/^/      /'
        FAIL=$((FAIL + 1))
    fi
}

assert_content_passes() {
    local label="$1"
    if ./check.sh content >/dev/null 2>&1; then
        echo "  PASS [$label]"
        PASS=$((PASS + 1))
    else
        echo "  FAIL [$label]: expected pass, but failed"
        ./check.sh content 2>&1 | head -5 | sed 's/^/      /'
        FAIL=$((FAIL + 1))
    fi
}

assert_message_fails() {
    local label="$1" msg="$2" expected="$3"
    local f
    f=$(mktemp -t fai_msg_test.XXXXXX)
    printf "%s\n" "$msg" > "$f"
    local out
    if out=$(./check.sh message "$f" 2>&1); then
        echo "  FAIL [$label]: expected fail, but passed"
        FAIL=$((FAIL + 1))
        rm -f "$f"
        return
    fi
    if echo "$out" | grep -q -F -- "$expected"; then
        echo "  PASS [$label]"
        PASS=$((PASS + 1))
    else
        echo "  FAIL [$label]: failed but did not mention '$expected'"
        echo "$out" | head -5 | sed 's/^/      /'
        FAIL=$((FAIL + 1))
    fi
    rm -f "$f"
}

assert_message_passes() {
    local label="$1" msg="$2"
    local f
    f=$(mktemp -t fai_msg_test.XXXXXX)
    printf "%s\n" "$msg" > "$f"
    if ./check.sh message "$f" >/dev/null 2>&1; then
        echo "  PASS [$label]"
        PASS=$((PASS + 1))
    else
        echo "  FAIL [$label]: expected pass, but failed"
        ./check.sh message "$f" 2>&1 | head -5 | sed 's/^/      /'
        FAIL=$((FAIL + 1))
    fi
    rm -f "$f"
}

# ─── content scenarios ──────────────────────────────────────────────

echo "── content scans ──"

d=$(setup_repo); cd "$d"
assert_content_passes "clean state"

d=$(setup_repo); cd "$d"
echo "TOKEN=ghp_aBcDeFgHiJkLmNoPqRsTuVwXyZ0123456789" > leak.txt
git add leak.txt
assert_content_fails "github PAT detected" "ghp_"

d=$(setup_repo); cd "$d"
echo "key: sk-ant-aBcDeFgHiJkLmNoPqRsTuVwXyZ0123456789aBcDeF" > anthropic.txt
git add anthropic.txt
assert_content_fails "anthropic key detected" "sk-ant-"

d=$(setup_repo); cd "$d"
echo "AWS_ACCESS_KEY=AKIAIOSFODNN7EXAMPLE" > aws.txt
git add aws.txt
assert_content_fails "AWS access key detected" "AKIA"

d=$(setup_repo); cd "$d"
echo "-----BEGIN RSA PRIVATE KEY-----" > id.pem
echo "stuff" >> id.pem
git add id.pem
assert_content_fails "PEM private key detected" "PRIVATE KEY"

d=$(setup_repo); cd "$d"
touch .env
echo "X=y" > .env
git add .env
assert_content_fails ".env in stage" "forbidden file"

d=$(setup_repo); cd "$d"
echo "DEMO_VAR=value" > .env.example
git add .env.example
assert_content_passes ".env.example allowlisted"

d=$(setup_repo); cd "$d"
mkdir tests
echo "fake cert content" > tests/server.pem
git add tests/server.pem
assert_content_passes "tests/*.pem allowlisted"

d=$(setup_repo); cd "$d"
echo "Notes from the ITDZ Berlin meeting" > confidential.md
git add confidential.md
assert_content_fails "confidential term ITDZ" "ITDZ"

d=$(setup_repo); cd "$d"
echo "Our viral release of a powerful tool that just works" > marketing.md
git add marketing.md
assert_content_fails "banned phrase viral" "viral"

d=$(setup_repo); cd "$d"
echo "viral content" > marketing.md
mkdir -p tools/today
echo "this references viral and powerful intentionally" > tools/today/prompt.md
echo "tools/today/" > .security-allow
git add .security-allow tools/today/prompt.md
assert_content_passes ".security-allow excludes legit listing"
# But banned content outside the allow path must still trip:
git add marketing.md
assert_content_fails ".security-allow does not cover other paths" "viral"

# ─── message scenarios ──────────────────────────────────────────────

echo ""
echo "── message scans ──"

# Need a working dir to run the script from (it cd's to git toplevel).
d=$(setup_repo); cd "$d"

assert_message_passes \
    "well-formed Conventional Commits + DCO" \
    "$(printf 'feat(hub): add thing\n\nbody\n\nSigned-off-by: Test <t@t.local>')"

assert_message_fails \
    "missing DCO" \
    "feat(hub): add thing" \
    "missing DCO"

assert_message_fails \
    "non-conventional subject" \
    "$(printf 'added stuff\n\nSigned-off-by: Test <t@t.local>')" \
    "Conventional Commits"

assert_message_fails \
    "Claude co-author trailer" \
    "$(printf 'feat(hub): add thing\n\nCo-Authored-By: Claude <claude@anthropic.com>\nSigned-off-by: Test <t@t.local>')" \
    "Co-Authored-By: Claude"

assert_message_fails \
    "banned phrase in message body" \
    "$(printf 'feat(hub): add thing\n\nThis is just a viral test.\n\nSigned-off-by: Test <t@t.local>')" \
    "banned phrase"

assert_message_passes \
    "merge commits skip Conventional check" \
    "$(printf 'Merge branch feature-x into main\n\nSigned-off-by: Test <t@t.local>')"

# ─── summary ────────────────────────────────────────────────────────

echo ""
echo "─────────────────────────────────"
echo "Tests: $PASS passed, $FAIL failed"
if [ "$FAIL" -ne 0 ]; then
    exit 1
fi