#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_DIR="$(cd -- "$SCRIPT_DIR/.." && pwd)"

VENV_DIR="$PROJECT_DIR/.venv"
REQUIREMENTS="$PROJECT_DIR/requirements.txt"
SPEC_FILE="$PROJECT_DIR/car_ui.spec"
DIST_DIR="$PROJECT_DIR/dist/car_ui"

echo "==> Car UI build"
echo "    Project: $PROJECT_DIR"

# --------------------------------------------------
# Check project files
# --------------------------------------------------

if [[ ! -f "$REQUIREMENTS" ]]; then
    echo "ERROR: requirements.txt not found:"
    echo "       $REQUIREMENTS"
    exit 1
fi

if [[ ! -f "$SPEC_FILE" ]]; then
    echo "ERROR: car_ui.spec not found:"
    echo "       $SPEC_FILE"
    exit 1
fi

# --------------------------------------------------
# Create virtual environment
# --------------------------------------------------

if [[ ! -d "$VENV_DIR" ]]; then
    echo "==> Creating virtual environment"

    if ! command -v python3 >/dev/null 2>&1; then
        echo "ERROR: python3 is not installed"
        exit 1
    fi

    python3 -m venv "$VENV_DIR"
else
    echo "==> Virtual environment already exists"
fi

PYTHON="$VENV_DIR/bin/python"
PIP="$VENV_DIR/bin/pip"

# --------------------------------------------------
# Install dependencies
# --------------------------------------------------

echo "==> Installing dependencies"

"$PIP" install --upgrade pip
"$PIP" install -r "$REQUIREMENTS"

# --------------------------------------------------
# Check PyInstaller
# --------------------------------------------------

if [[ ! -x "$VENV_DIR/bin/pyinstaller" ]]; then
    echo "ERROR: PyInstaller is not installed."
    echo "       Add pyinstaller to requirements.txt"
    exit 1
fi

# --------------------------------------------------
# Build
# --------------------------------------------------

echo "==> Building Car UI"

cd "$PROJECT_DIR"

"$VENV_DIR/bin/pyinstaller" \
    --noconfirm \
    --clean \
    "$SPEC_FILE"

# --------------------------------------------------
# Verify result
# --------------------------------------------------

if [[ ! -x "$DIST_DIR/car_ui" ]]; then
    echo "ERROR: Build failed."
    echo "       Executable not found:"
    echo "       $DIST_DIR/car_ui"
    exit 1
fi

echo
echo "==> Build complete"
echo "    $DIST_DIR/car_ui"