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

###############################################################################
# create-test-project.sh
#
# Creates a minimal Unity project structure suitable for testing a Unity package.
# Since this repo is a Unity PACKAGE (not a project), we scaffold a temporary
# Unity project that references this package via local path.
#
# Environment variables:
#   UNITY_VERSION          - Unity Editor version (default: 2021.3.45f1)
#   UNITY_TEST_PROJECT_DIR - Path to test project (default: /home/vscode/.unity-test-project)
#
# Flags:
#   --force  Recreate the project from scratch even if it already exists
#
# Usage:
#   ./create-test-project.sh
#   ./create-test-project.sh --force
###############################################################################

UNITY_VERSION="${UNITY_VERSION:-2021.3.45f1}"
UNITY_TEST_PROJECT_DIR="${UNITY_TEST_PROJECT_DIR:-/home/vscode/.unity-test-project}"

FORCE=0
for arg in "$@"; do
    case "${arg}" in
        --force)
            FORCE=1
            ;;
        *)
            echo "WARNING: Unknown argument: ${arg}"
            ;;
    esac
done

# Check if project already exists
if [[ -d "${UNITY_TEST_PROJECT_DIR}/Assets" && -f "${UNITY_TEST_PROJECT_DIR}/Packages/manifest.json" && "${FORCE}" -eq 0 ]]; then
    echo "==> [create-test-project] Test project already exists at ${UNITY_TEST_PROJECT_DIR}. Use --force to recreate."
    exit 0
fi

if [[ "${FORCE}" -eq 1 && -d "${UNITY_TEST_PROJECT_DIR}" ]]; then
    echo "==> [create-test-project] Removing existing test project (--force)..."
    rm -rf "${UNITY_TEST_PROJECT_DIR}"
fi

echo "==> [create-test-project] Creating test project at ${UNITY_TEST_PROJECT_DIR}..."

# Step 1: Create directory structure
echo "    [1/4] Creating directory structure..."
mkdir -p "${UNITY_TEST_PROJECT_DIR}/Assets"
mkdir -p "${UNITY_TEST_PROJECT_DIR}/ProjectSettings"
mkdir -p "${UNITY_TEST_PROJECT_DIR}/Packages"

# Step 2: Create ProjectVersion.txt
echo "    [2/4] Writing ProjectSettings/ProjectVersion.txt..."
cat > "${UNITY_TEST_PROJECT_DIR}/ProjectSettings/ProjectVersion.txt" << EOF
m_EditorVersion: ${UNITY_VERSION}
EOF

# Step 3: Create ProjectSettings.asset
echo "    [3/4] Writing ProjectSettings/ProjectSettings.asset..."
cat > "${UNITY_TEST_PROJECT_DIR}/ProjectSettings/ProjectSettings.asset" << 'EOF'
%YAML 1.1
%TAG !u! tag:unity3d.com,2011:
--- !u!129 &1
PlayerSettings:
  productName: UnityHelpers-TestProject
  companyName: WallstopStudios
  defaultScreenWidth: 1024
  defaultScreenHeight: 768
  runInBackground: 1
EOF

# Step 4: Create Packages/manifest.json
echo "    [4/4] Writing Packages/manifest.json..."
cat > "${UNITY_TEST_PROJECT_DIR}/Packages/manifest.json" << 'EOF'
{
  "dependencies": {
    "com.unity.test-framework": "1.1.33",
    "com.unity.modules.imgui": "1.0.0",
    "com.unity.modules.jsonserialize": "1.0.0",
    "com.unity.modules.uielements": "1.0.0",
    "com.unity.modules.ui": "1.0.0",
    "com.unity.modules.physics": "1.0.0",
    "com.unity.modules.physics2d": "1.0.0",
    "com.wallstop-studios.unity-helpers": "file:/workspace"
  }
}
EOF

# Note: packages-lock.json is intentionally NOT created.
# Unity generates it on first project open during dependency resolution.
# An empty lock file would cause resolution failures.

echo "==> [create-test-project] Test project created successfully."
echo "    Project dir: ${UNITY_TEST_PROJECT_DIR}"
echo "    Unity version: ${UNITY_VERSION}"
echo "    Package reference: file:/workspace"