#!/bin/bash

# YouMusic Local Development Setup Script
# For faster development without Docker (macOS/Linux only)
# Uses Python 3.13 and uv for package management

set -e

echo "🎵 YouMusic - Local Development Setup"
echo "======================================"
echo ""

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Check Python 3.13
echo "Checking Python 3.13 installation..."
if ! command -v python3.13 &> /dev/null; then
    echo -e "${RED}❌ Python 3.13 is required but not installed${NC}"
    echo ""
    echo "Install Python 3.13:"
    echo "  macOS:         brew install python@3.13"
    echo "  Ubuntu/Debian: sudo apt-get install python3.13 python3.13-venv"
    exit 1
fi

PYTHON_VERSION=$(python3.13 --version | cut -d' ' -f2)
echo -e "${GREEN}✅ Found Python $PYTHON_VERSION${NC}"

# Check uv
echo "Checking uv installation..."
if ! command -v uv &> /dev/null; then
    echo -e "${YELLOW}⚠️  uv not found, installing...${NC}"
    curl -LsSf https://astral.sh/uv/install.sh | sh
    # Source the profile to get uv in PATH
    export PATH="$HOME/.cargo/bin:$PATH"
    if ! command -v uv &> /dev/null; then
        echo -e "${RED}❌ Failed to install uv${NC}"
        exit 1
    fi
fi

UV_VERSION=$(uv --version)
echo -e "${GREEN}✅ Found uv $UV_VERSION${NC}"

# Check Node.js
echo "Checking Node.js installation..."
if ! command -v node &> /dev/null; then
    echo -e "${RED}❌ Node.js is required but not installed${NC}"
    echo "Please install Node.js 18 or higher"
    exit 1
fi

NODE_VERSION=$(node --version)
echo -e "${GREEN}✅ Found Node.js $NODE_VERSION${NC}"

# Check FFmpeg
echo "Checking FFmpeg installation..."
if ! command -v ffmpeg &> /dev/null; then
    echo -e "${YELLOW}⚠️  FFmpeg not found${NC}"
    echo "FFmpeg is required for audio processing. Install it:"
    echo "  macOS:         brew install ffmpeg"
    echo "  Ubuntu/Debian: sudo apt-get install ffmpeg"
    echo ""
    read -p "Do you want to continue anyway? (y/n) " -n 1 -r
    echo
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        exit 1
    fi
else
    FFMPEG_VERSION=$(ffmpeg -version | head -n1)
    echo -e "${GREEN}✅ Found FFmpeg${NC}"
fi

echo ""
echo "📁 Setting up project directories..."
mkdir -p data/music data/uploads data/temp

# Backend setup
echo ""
echo "🔧 Setting up Backend..."
cd backend

if [ ! -d ".venv" ]; then
    echo "Creating Python 3.13 virtual environment with uv..."
    uv venv --python 3.13
fi

echo "Installing Python dependencies with uv..."
uv sync

echo -e "${GREEN}✅ Backend setup complete${NC}"

# Create .env file if it doesn't exist
if [ ! -f ".env" ]; then
    echo "Creating .env file..."
    cp .env.example .env
    echo -e "${YELLOW}⚠️  Please review backend/.env and adjust settings if needed${NC}"
fi

cd ..

# Frontend setup
echo ""
echo "🎨 Setting up Frontend..."
cd frontend

if [ ! -d "node_modules" ]; then
    echo "Installing npm dependencies (this may take a few minutes)..."
    NODE_ENV= npm install --include=dev
else
    echo "Updating npm dependencies..."
    NODE_ENV= npm install --include=dev
fi

echo -e "${GREEN}✅ Frontend setup complete${NC}"

# Create .env file if it doesn't exist
if [ ! -f ".env" ]; then
    echo "Creating .env file..."
    cp .env.example .env
fi

cd ..

echo ""
echo -e "${GREEN}✅ Setup Complete!${NC}"
echo ""
echo "======================================"
echo "🚀 Start Development Servers"
echo "======================================"
echo ""
echo "You need to run TWO terminals:"
echo ""
echo -e "${YELLOW}Terminal 1 - Backend:${NC}"
echo "  cd backend"
echo "  source .venv/bin/activate"
echo "  python main.py"
echo ""
echo -e "${YELLOW}Terminal 2 - Frontend:${NC}"
echo "  cd frontend"
echo "  npm run dev"
echo ""
echo "Then visit: http://localhost:3000"
echo ""
echo "Or use the helper scripts:"
echo "  ./dev-backend.sh   (start backend)"
echo "  ./dev-frontend.sh  (start frontend)"
echo "  ./dev.sh           (start both in background)"
echo ""