from django.shortcuts import render, redirect, get_object_or_404
from django.contrib.auth.decorators import login_required
from django.contrib.auth import login, logout
from django.contrib.auth.forms import AuthenticationForm
from django.contrib import messages
from django.http import JsonResponse
from .models import RegistryConfig
from .forms import RegistryConfigForm
from .registry_client import RegistryClient


def login_view(request):
    if request.user.is_authenticated:
        return redirect('dashboard')

    if request.method == 'POST':
        form = AuthenticationForm(request, data=request.POST)
        if form.is_valid():
            user = form.get_user()
            login(request, user)
            messages.success(request, f'Bienvenido {user.username}')
            return redirect('dashboard')
    else:
        form = AuthenticationForm()

    return render(request, 'explorer/login.html', {'form': form})


def logout_view(request):
    logout(request)
    messages.info(request, 'Sesión cerrada')
    return redirect('login')


@login_required
def dashboard(request):
    registries = RegistryConfig.objects.all()
    return render(request, 'explorer/dashboard.html', {'registries': registries})


@login_required
def registry_create(request):
    if request.method == 'POST':
        form = RegistryConfigForm(request.POST)
        if form.is_valid():
            config = form.save(commit=False)
            client = RegistryClient(
                url=config.url,
                username=config.username,
                password=config.password,
                verify_ssl=config.verify_ssl
            )
            ok, msg = client.check_connection()
            if ok:
                config.save()
                messages.success(request, f'Registry "{config.name}" configurado correctamente')
                return redirect('dashboard')
            else:
                messages.error(request, f'No se pudo conectar: {msg}')
    else:
        form = RegistryConfigForm()

    return render(request, 'explorer/registry_form.html', {'form': form, 'title': 'Agregar Registry'})


@login_required
def registry_edit(request, pk):
    config = get_object_or_404(RegistryConfig, pk=pk)
    if request.method == 'POST':
        form = RegistryConfigForm(request.POST, instance=config)
        if form.is_valid():
            form.save()
            messages.success(request, f'Registry "{config.name}" actualizado')
            return redirect('dashboard')
    else:
        form = RegistryConfigForm(instance=config)

    return render(request, 'explorer/registry_form.html', {'form': form, 'title': 'Editar Registry'})


@login_required
def registry_delete(request, pk):
    config = get_object_or_404(RegistryConfig, pk=pk)
    if request.method == 'POST':
        name = config.name
        config.delete()
        messages.success(request, f'Registry "{name}" eliminado')
        return redirect('dashboard')
    return render(request, 'explorer/registry_confirm_delete.html', {'config': config})


@login_required
def registry_repositories(request, pk):
    config = get_object_or_404(RegistryConfig, pk=pk)
    client = RegistryClient(
        url=config.url,
        username=config.username,
        password=config.password,
        verify_ssl=config.verify_ssl
    )

    ok, msg = client.check_connection()
    if not ok:
        messages.error(request, f'Error de conexión: {msg}')
        return redirect('dashboard')

    try:
        repositories = client.list_catalog()
    except Exception as e:
        messages.error(request, f'Error al listar repositorios: {str(e)}')
        repositories = []

    search = request.GET.get('search', '').strip()
    if search:
        repositories = [r for r in repositories if search.lower() in r.lower()]

    return render(request, 'explorer/repositories.html', {
        'config': config,
        'repositories': repositories,
        'search': search,
        'count': len(repositories),
    })


@login_required
def repository_tags(request, pk, repo_name):
    config = get_object_or_404(RegistryConfig, pk=pk)
    client = RegistryClient(
        url=config.url,
        username=config.username,
        password=config.password,
        verify_ssl=config.verify_ssl
    )

    try:
        tags = client.list_tags(repo_name)
    except Exception as e:
        messages.error(request, f'Error al listar tags: {str(e)}')
        tags = []

    search = request.GET.get('search', '').strip()
    if search:
        tags = [t for t in tags if search.lower() in t.lower()]

    return render(request, 'explorer/tags.html', {
        'config': config,
        'repo_name': repo_name,
        'tags': tags,
        'search': search,
        'count': len(tags),
    })


@login_required
def image_detail(request, pk, repo_name, tag):
    config = get_object_or_404(RegistryConfig, pk=pk)
    client = RegistryClient(
        url=config.url,
        username=config.username,
        password=config.password,
        verify_ssl=config.verify_ssl
    )

    try:
        detail = client.get_image_detail(repo_name, tag)
    except Exception as e:
        messages.error(request, f'Error al obtener detalles: {str(e)}')
        return redirect('repository_tags', pk=pk, repo_name=repo_name)

    return render(request, 'explorer/image_detail.html', {
        'config': config,
        'repo_name': repo_name,
        'tag': tag,
        'detail': detail,
    })


@login_required
def image_delete(request, pk, repo_name, tag):
    config = get_object_or_404(RegistryConfig, pk=pk)
    if request.method != 'POST':
        return redirect('image_detail', pk=pk, repo_name=repo_name, tag=tag)

    client = RegistryClient(
        url=config.url,
        username=config.username,
        password=config.password,
        verify_ssl=config.verify_ssl
    )

    ok, msg = client.delete_manifest(repo_name, tag)
    if ok:
        messages.success(request, msg)
    else:
        messages.error(request, msg)

    return redirect('repository_tags', pk=pk, repo_name=repo_name)


@login_required
def api_check_connection(request):
    if request.method != 'POST':
        return JsonResponse({'error': 'Método no permitido'}, status=405)

    url = request.POST.get('url', '')
    username = request.POST.get('username', '')
    password = request.POST.get('password', '')
    verify_ssl = request.POST.get('verify_ssl', 'on') == 'on'

    if not url:
        return JsonResponse({'ok': False, 'message': 'URL requerida'})

    client = RegistryClient(url=url, username=username, password=password, verify_ssl=verify_ssl)
    ok, msg = client.check_connection()
    return JsonResponse({'ok': ok, 'message': msg})