#!/bin/bash

# Script to install Twilio PHP SDK to an external location
# This prevents SDK from being deleted when WordPress updates the plugin
#
# Location: wp-content/twilio-sdk/ (outside plugin folder)

echo "Installing Twilio PHP SDK v8.7.0 to external location..."
echo "This will install the SDK outside the plugin folder to survive plugin updates."

# Check if we can download files
if ! command -v curl &> /dev/null; then
    echo "ERROR: curl is required to download the SDK"
    echo "Please install curl and try again"
    exit 1
fi

if ! command -v tar &> /dev/null; then
    echo "ERROR: tar is required to extract the SDK"
    echo "Please install tar and try again"
    exit 1
fi

# Get the script directory (plugin directory)
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# Calculate wp-content directory (two levels up from plugin)
# Plugin is at: wp-content/plugins/twilio-wp-plugin/
# We want: wp-content/twilio-sdk/
WP_CONTENT_DIR="$(dirname "$(dirname "$SCRIPT_DIR")")"
SDK_DIR="$WP_CONTENT_DIR/twilio-sdk"

echo "Plugin directory: $SCRIPT_DIR"
echo "SDK will be installed to: $SDK_DIR"

# Create SDK directory
mkdir -p "$SDK_DIR/twilio/sdk"

# Download the latest release (8.7.0)
echo "Downloading Twilio SDK from GitHub..."
TEMP_DIR=$(mktemp -d)
cd "$TEMP_DIR"

if ! curl -L https://github.com/twilio/twilio-php/archive/refs/tags/8.7.0.tar.gz -o twilio-sdk.tar.gz; then
    echo "ERROR: Failed to download Twilio SDK"
    echo "Please check your internet connection and try again"
    rm -rf "$TEMP_DIR"
    exit 1
fi

# Extract the archive
echo "Extracting SDK files..."
if ! tar -xzf twilio-sdk.tar.gz; then
    echo "ERROR: Failed to extract SDK files"
    rm -rf "$TEMP_DIR"
    exit 1
fi

# Check if the extracted directory exists
if [ ! -d "twilio-php-8.7.0/src" ]; then
    echo "ERROR: Extracted SDK directory structure is unexpected"
    rm -rf "$TEMP_DIR"
    exit 1
fi

# Remove existing SDK if it exists
if [ -d "$SDK_DIR/twilio/sdk" ]; then
    echo "Removing existing SDK installation..."
    rm -rf "$SDK_DIR/twilio/sdk"
    mkdir -p "$SDK_DIR/twilio/sdk"
fi

# Move the entire src directory to be the sdk
echo "Installing SDK files..."
if ! mv twilio-php-8.7.0/src/* "$SDK_DIR/twilio/sdk/"; then
    echo "ERROR: Failed to move SDK files"
    rm -rf "$TEMP_DIR"
    exit 1
fi

# Create a comprehensive autoloader
cat > "$SDK_DIR/autoload.php" << 'EOF'
<?php
/**
 * Twilio SDK v8.7.0 Autoloader (External Installation)
 * This file loads the Twilio PHP SDK classes
 *
 * Location: wp-content/twilio-sdk/autoload.php
 * This location survives WordPress plugin updates
 */

// Prevent multiple registrations
if (!defined('TWILIO_AUTOLOADER_REGISTERED')) {
    define('TWILIO_AUTOLOADER_REGISTERED', true);

    // Register the autoloader
    spl_autoload_register(function ($class) {
        // Only handle Twilio classes
        if (strpos($class, 'Twilio\\') !== 0) {
            return false;
        }

        // Convert class name to file path
        // The SDK structure is: twilio/sdk/Twilio/Rest/Client.php for Twilio\Rest\Client
        $file = __DIR__ . '/twilio/sdk/' . str_replace('\\', '/', $class) . '.php';

        if (file_exists($file)) {
            require_once $file;
            return true;
        }

        return false;
    });

    // Try to load the SDK's own autoloader if it exists
    $sdk_autoloader = __DIR__ . '/twilio/sdk/autoload.php';
    if (file_exists($sdk_autoloader)) {
        require_once $sdk_autoloader;
    }

    // Load essential Twilio classes manually to ensure they're available
    $essential_classes = [
        __DIR__ . '/twilio/sdk/Twilio/Rest/Client.php',
        __DIR__ . '/twilio/sdk/Twilio/TwiML/VoiceResponse.php',
        __DIR__ . '/twilio/sdk/Twilio/Exceptions/TwilioException.php',
        __DIR__ . '/twilio/sdk/Twilio/Security/RequestValidator.php'
    ];

    foreach ($essential_classes as $class_file) {
        if (file_exists($class_file)) {
            require_once $class_file;
        }
    }
}
EOF

# Clean up temp directory
cd "$SCRIPT_DIR"
rm -rf "$TEMP_DIR"

# Verify installation
echo ""
echo "Verifying installation..."
if [ -f "$SDK_DIR/autoload.php" ] && [ -d "$SDK_DIR/twilio/sdk" ]; then
    echo "=============================================="
    echo "Twilio SDK v8.7.0 installed successfully!"
    echo "=============================================="
    echo ""
    echo "Installation location: $SDK_DIR"
    echo ""
    echo "This SDK is installed OUTSIDE the plugin folder,"
    echo "so it will NOT be deleted when WordPress updates the plugin."
    echo ""
    echo "The plugin will automatically detect this external SDK."
else
    echo "Installation failed - files not found"
    exit 1
fi