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<?php
/**
 * ChatRoom Model
 * Migrated from Prisma ChatRoom model
 */

require_once __DIR__ . '/../config/database.php';

class ChatRoom {
    private $conn;
    private $table_name = "ChatRoom";

    public $id;
    public $name;
    public $type;
    public $createdAt;
    public $updatedAt;
    public $createdById;

    public function __construct($db) {
        $this->conn = $db;
    }

    // Create chat room
    public function create() {
        $query = "INSERT INTO " . $this->table_name . " 
                  (id, name, type, createdAt, updatedAt, createdById)
                  VALUES 
                  (:id, :name, :type, :createdAt, :updatedAt, :createdById)";

        $stmt = $this->conn->prepare($query);

        // Generate UUID for id
        $this->id = $this->generateUUID();
        $this->createdAt = date('Y-m-d H:i:s');
        $this->updatedAt = date('Y-m-d H:i:s');

        // Bind values
        $stmt->bindParam(':id', $this->id);
        $stmt->bindParam(':name', $this->name);
        $stmt->bindParam(':type', $this->type);
        $stmt->bindParam(':createdAt', $this->createdAt);
        $stmt->bindParam(':updatedAt', $this->updatedAt);
        $stmt->bindParam(':createdById', $this->createdById);

        if($stmt->execute()) {
            return true;
        }
        return false;
    }

    // Read chat room by ID
    public function findById($id) {
        $query = "SELECT * FROM " . $this->table_name . " WHERE id = :id LIMIT 1";
        $stmt = $this->conn->prepare($query);
        $stmt->bindParam(':id', $id);
        $stmt->execute();

        if($stmt->rowCount() > 0) {
            $row = $stmt->fetch(PDO::FETCH_ASSOC);
            $this->id = $row['id'];
            $this->name = $row['name'];
            $this->type = $row['type'];
            $this->createdAt = $row['createdAt'];
            $this->updatedAt = $row['updatedAt'];
            $this->createdById = $row['createdById'];
            return true;
        }
        return false;
    }

    // Get chat rooms for user
    public function getByUserId($userId) {
        $query = "SELECT cr.* FROM " . $this->table_name . " cr
                  INNER JOIN ChatParticipant cp ON cr.id = cp.chatRoomId
                  WHERE cp.userId = :userId
                  ORDER BY cr.updatedAt DESC";
        $stmt = $this->conn->prepare($query);
        $stmt->bindParam(':userId', $userId);
        $stmt->execute();

        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    // Update chat room
    public function update() {
        $query = "UPDATE " . $this->table_name . " 
                  SET name = :name, 
                      type = :type,
                      updatedAt = :updatedAt
                  WHERE id = :id";

        $stmt = $this->conn->prepare($query);

        $this->updatedAt = date('Y-m-d H:i:s');

        // Bind values
        $stmt->bindParam(':id', $this->id);
        $stmt->bindParam(':name', $this->name);
        $stmt->bindParam(':type', $this->type);
        $stmt->bindParam(':updatedAt', $this->updatedAt);

        if($stmt->execute()) {
            return true;
        }
        return false;
    }

    // Delete chat room
    public function delete() {
        $query = "DELETE FROM " . $this->table_name . " WHERE id = :id";
        $stmt = $this->conn->prepare($query);
        $stmt->bindParam(':id', $this->id);

        if($stmt->execute()) {
            return true;
        }
        return false;
    }

    // Generate UUID
    private function generateUUID() {
        return sprintf('%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
            mt_rand(0, 0xffff), mt_rand(0, 0xffff),
            mt_rand(0, 0xffff),
            mt_rand(0, 0x0fff) | 0x4000,
            mt_rand(0, 0x3fff) | 0x8000,
            mt_rand(0, 0xffff), mt_rand(0, 0xffff), mt_rand(0, 0xffff)
        );
    }
}
?>