#!/bin/bash
set -euo pipefail

PLUGIN_DIR="$(cd "$(dirname "$0")/.." && pwd)"
REAL_SCRIPT="$PLUGIN_DIR/scripts/install_db.sh"
TMP_DIR="$(mktemp -d)"
trap 'rm -rf "$TMP_DIR"' EXIT

fail() {
  echo "FAIL: $*" >&2
  exit 1
}

# Extract the exact, real maybe_takeover_native_port() function body from the
# real script (rather than reimplementing it), so this test exercises the
# actual production logic without triggering the script's own main() (which
# needs a full install environment).
FUNCS_FILE="$TMP_DIR/funcs.sh"
{
  echo '#!/bin/bash'
  echo 'log() { echo "[INFO] $*"; }'
  echo 'die() { echo "[BŁĄD] $*" >&2; exit 1; }'
  awk '/^maybe_takeover_native_port\(\)/,/^\}/' "$REAL_SCRIPT"
} > "$FUNCS_FILE"

grep -q '^maybe_takeover_native_port()' "$FUNCS_FILE" \
  || fail "could not extract maybe_takeover_native_port() from $REAL_SCRIPT"

# shellcheck source=/dev/null
source "$FUNCS_FILE"

mkdir -p "$TMP_DIR/setup"
CALL_LOG="$TMP_DIR/calls.log"
cat > "$TMP_DIR/setup/native_mariadb_port_takeover.sh" <<EOF
#!/bin/bash
echo "CALLED" >> "$CALL_LOG"
exit 0
EOF
chmod 755 "$TMP_DIR/setup/native_mariadb_port_takeover.sh"

NATIVE_TAKEOVER_SCRIPT="$TMP_DIR/setup/native_mariadb_port_takeover.sh"

# --- Scenario 1: PORT=3306 must call the takeover script ---
PORT="3306"
: > "$CALL_LOG"
maybe_takeover_native_port
grep -Fxq "CALLED" "$CALL_LOG" || fail "expected takeover script to be called when PORT=3306"

# --- Scenario 2: PORT!=3306 must NOT call the takeover script ---
PORT="33033"
: > "$CALL_LOG"
maybe_takeover_native_port
[ ! -s "$CALL_LOG" ] || fail "expected takeover script NOT to be called when PORT=33033"

# --- Scenario 3: takeover script failure must abort (non-zero exit) ---
cat > "$TMP_DIR/setup/native_mariadb_port_takeover.sh" <<EOF
#!/bin/bash
echo "CALLED-FAIL" >> "$CALL_LOG"
exit 1
EOF
chmod 755 "$TMP_DIR/setup/native_mariadb_port_takeover.sh"

PORT="3306"
set +e
FAIL_OUTPUT="$(maybe_takeover_native_port 2>&1)"
FAIL_STATUS=$?
set -e
[ "$FAIL_STATUS" -ne 0 ] || fail "maybe_takeover_native_port should fail when the takeover script fails"
printf '%s\n' "$FAIL_OUTPUT" | grep -Fq "Przejęcie portu" \
  || fail "expected a clear error message on takeover failure, got: $FAIL_OUTPUT"

echo "install_db_native_takeover_wiring_test: OK"