#!/bin/bash
# iOS Test App Requirements Checker
# Verifies all prerequisites are installed and configured

set -e

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

check_pass() {
    echo -e "${GREEN}✓${NC} $1"
}

check_fail() {
    echo -e "${RED}✗${NC} $1"
}

check_warn() {
    echo -e "${YELLOW}⚠${NC} $1"
}

check_info() {
    echo -e "${BLUE}ℹ${NC} $1"
}

echo "Checking iOS Test App Requirements..."
echo ""

# Check macOS
if [[ "$OSTYPE" != "darwin"* ]]; then
    check_fail "macOS required (current: $OSTYPE)"
    exit 1
else
    check_pass "macOS detected"
fi

# Check Xcode
if ! command -v xcodebuild &> /dev/null; then
    check_fail "Xcode command line tools not found"
    echo "  Install with: xcode-select --install"
    exit 1
else
    XCODE_VERSION=$(xcodebuild -version 2>&1 | head -1)
    check_pass "Xcode found: $XCODE_VERSION"
fi

# Check Ruby
RUBY_VERSION=$(ruby --version 2>&1 | awk '{print $2}' || echo "not found")
if [ "$RUBY_VERSION" = "not found" ]; then
    check_fail "Ruby not found"
    echo "  Install with: brew install ruby"
    exit 1
else
    # Check Ruby version
    RUBY_MAJOR=$(echo "$RUBY_VERSION" | cut -d. -f1)
    RUBY_MINOR=$(echo "$RUBY_VERSION" | cut -d. -f2)
    if [ "$RUBY_MAJOR" -lt 3 ] || ([ "$RUBY_MAJOR" -eq 3 ] && [ "$RUBY_MINOR" -lt 1 ]); then
        check_warn "Ruby version $RUBY_VERSION is too old (requires 3.1+)"
        echo "  Recommended: Use rbenv to install Ruby 3.1+"
        echo "    rbenv install 3.1.0"
        echo "    rbenv global 3.1.0"
    else
        check_pass "Ruby version: $RUBY_VERSION"
    fi
fi

# Check rbenv (optional but recommended)
if command -v rbenv &> /dev/null; then
    RBENV_VERSION=$(rbenv version-name 2>/dev/null || echo "not set")
    check_pass "rbenv found (current: $RBENV_VERSION)"
else
    check_info "rbenv not found (optional, but recommended for Ruby version management)"
fi

# Check CocoaPods
POD_CMD=""
POD_VERSION=""
if command -v pod &> /dev/null; then
    POD_CMD="pod"
    POD_VERSION=$(pod --version 2>/dev/null || echo "unknown")
    check_pass "CocoaPods found: $POD_VERSION"
elif [ -f ~/.rbenv/shims/pod ]; then
    POD_CMD="~/.rbenv/shims/pod"
    POD_VERSION=$($POD_CMD --version 2>/dev/null || echo "unknown")
    check_pass "CocoaPods found via rbenv: $POD_VERSION"
    check_info "  Using: $POD_CMD"
elif [ -f ~/.gem/bin/pod ]; then
    POD_CMD="~/.gem/bin/pod"
    POD_VERSION=$($POD_CMD --version 2>/dev/null || echo "unknown")
    check_pass "CocoaPods found: $POD_VERSION"
    check_info "  Using: $POD_CMD"
else
    check_fail "CocoaPods not found"
    echo ""
    echo "  Installation options:"
    echo "    1. With rbenv (recommended):"
    echo "       rbenv install 3.1.0"
    echo "       rbenv global 3.1.0"
    echo "       gem install cocoapods"
    echo ""
    echo "    2. With system Ruby (if Ruby 3.1+):"
    echo "       gem install cocoapods"
    echo ""
    echo "    3. With Homebrew:"
    echo "       brew install cocoapods"
    exit 1
fi

# Check Node.js
if ! command -v node &> /dev/null; then
    check_fail "Node.js not found"
    echo "  Install with: brew install node"
    exit 1
else
    NODE_VERSION=$(node --version)
    check_pass "Node.js found: $NODE_VERSION"
fi

# Check npm
if ! command -v npm &> /dev/null; then
    check_fail "npm not found"
    exit 1
else
    NPM_VERSION=$(npm --version)
    check_pass "npm found: $NPM_VERSION"
fi

# Check Capacitor CLI
if ! command -v npx &> /dev/null; then
    check_warn "npx not found (needed for Capacitor CLI)"
else
    check_pass "npx found"
fi

# Check encoding
if [ -z "$LANG" ] || [[ ! "$LANG" =~ UTF-8 ]]; then
    check_warn "LANG not set to UTF-8 (CocoaPods requires this)"
    echo "  Add to ~/.zshrc or ~/.bash_profile:"
    echo "    export LANG=en_US.UTF-8"
else
    check_pass "LANG set to UTF-8: $LANG"
fi

# Check iOS Simulator
if command -v xcrun &> /dev/null; then
    SIMULATORS=$(xcrun simctl list devices available 2>/dev/null | grep -i "iphone" | wc -l | tr -d ' ')
    if [ "$SIMULATORS" -gt 0 ]; then
        check_pass "iOS Simulators available: $SIMULATORS devices"
    else
        check_warn "No iOS simulators found"
        echo "  Install via Xcode: Xcode > Settings > Platforms"
    fi
else
    check_warn "xcrun not found"
fi

echo ""
echo -e "${GREEN}All requirements met!${NC}"
echo ""
echo "Next steps:"
echo "  1. cd test-apps/ios-test-app/App"
echo "  2. export LANG=en_US.UTF-8"
echo "  3. $POD_CMD install"
echo "  4. ../scripts/build-and-deploy.sh"