<?php
require_once 'config.php';

try {
    $pdo = db();
    
    // volunteers table
    $sql_volunteers = "
    CREATE TABLE IF NOT EXISTS volunteers (
        id INT AUTO_INCREMENT PRIMARY KEY,
        name VARCHAR(255) NOT NULL,
        email VARCHAR(255) NOT NULL UNIQUE,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    );";
    $pdo->exec($sql_volunteers);
    echo "Database table 'volunteers' created successfully (if it didn't exist).\n";

    // volunteer_assignments table
    $sql_assignments = "
    CREATE TABLE IF NOT EXISTS volunteer_assignments (
        id INT AUTO_INCREMENT PRIMARY KEY,
        listing_id INT NOT NULL,
        volunteer_id INT NOT NULL,
        assigned_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (listing_id) REFERENCES food_listings(id) ON DELETE CASCADE,
        FOREIGN KEY (volunteer_id) REFERENCES volunteers(id) ON DELETE CASCADE
    );";
    $pdo->exec($sql_assignments);
    echo "Database table 'volunteer_assignments' created successfully (if it didn't exist).\n";

    // Add 'assigned' to the status enum in food_listings
    // Note: This might fail if the enum value already exists, which is fine.
    try {
        $sql_alter_listings = "ALTER TABLE food_listings MODIFY status ENUM('available', 'claimed', 'collected', 'assigned') DEFAULT 'available'";
        $pdo->exec($sql_alter_listings);
        echo "Altered 'food_listings' table to add 'assigned' status.\n";
    } catch (PDOException $e) {
        // This will likely throw an error if you run it more than once.
        echo "Could not alter 'food_listings' table (maybe 'assigned' status already exists).\n";
    }

} catch (PDOException $e) {
    die("DB ERROR: " . $e->getMessage());
}