"""
API endpoints для управления Docker образами
Автор: Сергей Антропов
Сайт: https://devops.org.ru
"""

from fastapi import APIRouter, Request, HTTPException
from fastapi.responses import HTMLResponse, JSONResponse
from fastapi.templating import Jinja2Templates
from pathlib import Path
from typing import List, Dict
from app.core.config import settings
from app.core.docker_client import DockerClient

router = APIRouter()
templates_path = Path(__file__).parent.parent.parent.parent / "templates"
templates = Jinja2Templates(directory=str(templates_path))


def get_docker_client():
    """Получение Docker клиента с обработкой ошибок"""
    try:
        return DockerClient()
    except Exception:
        return None


@router.get("/docker", response_class=HTMLResponse)
async def docker_page(request: Request):
    """Страница управления Docker образами"""
    docker_client = get_docker_client()
    images = []
    
    if docker_client:
        try:
            images = docker_client.list_images()
        except Exception:
            pass
    
    return templates.TemplateResponse(
        "pages/docker/index.html",
        {
            "request": request,
            "images": images
        }
    )


@router.get("/api/v1/docker/images", response_class=HTMLResponse)
async def get_docker_images():
    """API endpoint для получения списка Docker образов"""
    docker_client = get_docker_client()
    
    if not docker_client:
        return """
        <div class="alert alert-warning">
            <i class="fas fa-exclamation-triangle me-2"></i>
            <strong>Docker недоступен</strong>
            <br><small class="text-muted">Убедитесь, что Docker запущен и доступен. Проверьте, что Docker socket доступен: <code>/var/run/docker.sock</code></small>
        </div>
        """
    
    try:
        images = docker_client.list_images()
        if not images:
            return """
            <div class="text-center py-5">
                <i class="fab fa-docker fa-3x text-muted mb-3"></i>
                <p class="text-muted">Docker образы не найдены</p>
            </div>
            """
        
        html = '<div class="table-responsive"><table class="table table-hover"><thead><tr><th>ID</th><th>Теги</th><th>Размер</th><th>Создан</th></tr></thead><tbody>'
        for img in images:
            size_mb = (img.get("size", 0) / 1024 / 1024) if img.get("size") else 0
            size_str = f"{size_mb:.2f} MB" if size_mb > 0 else "N/A"
            tags_list = img.get("tags", [])
            if tags_list:
                tags = " ".join([f'<span class="badge bg-info me-1">{tag}</span>' for tag in tags_list])
            else:
                tags = '<span class="text-muted">нет тегов</span>'
            img_id = img.get("id", "")[:12] if img.get("id") else "N/A"
            created = img.get("created", "")
            if created:
                try:
                    # Парсим ISO формат даты или timestamp
                    from datetime import datetime
                    if isinstance(created, (int, float)):
                        # Unix timestamp
                        dt = datetime.fromtimestamp(created)
                        created_str = dt.strftime('%d.%m.%Y %H:%M')
                    elif isinstance(created, str):
                        # ISO формат
                        try:
                            dt = datetime.fromisoformat(created.replace('Z', '+00:00'))
                        except:
                            # Пробуем другой формат
                            dt = datetime.strptime(created.split('.')[0], '%Y-%m-%dT%H:%M:%S')
                        created_str = dt.strftime('%d.%m.%Y %H:%M')
                    else:
                        created_str = str(created)
                except Exception as e:
                    created_str = str(created)
            else:
                created_str = "N/A"
            
            html += f'<tr><td><code>{img_id}</code></td><td>{tags}</td><td>{size_str}</td><td>{created_str}</td></tr>'
        html += '</tbody></table></div>'
        return html
    except Exception as e:
        return f"""
        <div class="alert alert-danger">
            <i class="fas fa-exclamation-circle me-2"></i>
            <strong>Ошибка при получении списка образов:</strong> {str(e)}
        </div>
        """