<?php
// models/HospitalMap.php
require_once dirname(__DIR__) . '/config/database.php';

class HospitalMap {
    private $conn;
    private $table_name = "hospital_maps";

    public function __construct() {
        $this->conn = Database::getInstance();
    }

    public function getAll($status = null) {
        $query = "SELECT * FROM " . $this->table_name;
        if ($status) {
            $query .= " WHERE status = :status";
        }
        $query .= " ORDER BY building ASC, floor ASC";
        
        $stmt = $this->conn->prepare($query);
        if ($status) {
            $stmt->bindParam(':status', $status);
        }
        $stmt->execute();
        
        return $stmt->fetchAll(PDO::FETCH_ASSOC);
    }

    public function getById($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) {
            return $stmt->fetch(PDO::FETCH_ASSOC);
        }
        return false;
    }

    public function create($data) {
        $query = "INSERT INTO " . $this->table_name . " 
                  (name, building, floor, image_path, transport_center_location, status) 
                  VALUES (:name, :building, :floor, :image_path, :transport_center_location, :status)";
        
        $stmt = $this->conn->prepare($query);
        
        $stmt->bindParam(':name', $data['name']);
        $stmt->bindParam(':building', $data['building']);
        $stmt->bindParam(':floor', $data['floor']);
        $stmt->bindParam(':image_path', $data['image_path']);
        $stmt->bindParam(':transport_center_location', $data['transport_center_location']);
        $stmt->bindParam(':status', $data['status']);
        
        return $stmt->execute();
    }

    public function update($id, $data) {
        $update_fields = [];
        $params = [':id' => $id];
        
        foreach (['name', 'building', 'floor', 'transport_center_location', 'status'] as $field) {
            if (isset($data[$field])) {
                $update_fields[] = "{$field} = :{$field}";
                $params[":{$field}"] = $data[$field];
            }
        }
        
        // Update image only if provided
        if (isset($data['image_path'])) {
            $update_fields[] = "image_path = :image_path";
            $params[":image_path"] = $data['image_path'];
        }

        if (empty($update_fields)) return false;

        $query = "UPDATE " . $this->table_name . " SET " . implode(", ", $update_fields) . " WHERE id = :id";
        $stmt = $this->conn->prepare($query);
        
        foreach ($params as $key => &$val) {
            $stmt->bindParam($key, $val);
        }
        
        return $stmt->execute();
    }

    public function delete($id) {
        // Find image path to delete file
        $map = $this->getById($id);
        if ($map && !empty($map['image_path'])) {
            $file_path = dirname(__DIR__) . '/' . $map['image_path'];
            if (file_exists($file_path)) {
                unlink($file_path);
            }
        }

        $query = "DELETE FROM " . $this->table_name . " WHERE id = :id";
        $stmt = $this->conn->prepare($query);
        $stmt->bindParam(':id', $id);
        return $stmt->execute();
    }
}