import json
import base64
import requests
from django.http import JsonResponse
from django.views.generic import TemplateView, View

class DashboardView(TemplateView):
    template_name = "monitor/dashboard.html"

class ClusterGraphDataView(View):
    def get(self, request, *args, **kwargs):
        try:
            repo_name = request.GET.get("repo", "boday_tf")
            # Nutzt das stabile Docker-Host-Gateway
            consul_url = f"http://172.17.0{repo_name}"
            
            response = requests.get(consul_url, timeout=5)
            if response.status_code == 404:
                return JsonResponse({"name": f"Warte auf Consul-Key '{repo_name}'...", "type": "Root", "children": []})
            
            consul_data = response.json()
            raw_value = None
            
            # KORRIGIERT: Holt explizit das ERSTE Element aus der Consul-Liste über den Index Null!
            if isinstance(consul_data, list) and len(consul_data) > 0:
                first_item = consul_data[0]
                if isinstance(first_item, dict):
                    raw_value = first_item.get("Value")
            elif isinstance(consul_data, dict):
                raw_value = consul_data.get("Value")

            if not raw_value:
                return JsonResponse({"name": f"Key '{repo_name}' leer.", "type": "Root", "children": []})
            
            # Base64 decodieren
            state_json = json.loads(base64.b64decode(raw_value).decode('utf-8'))
            resources = state_json.get("resources", [])
            
            root_node = {
                "name": f"Consul Storage: {repo_name}",
                "type": "Root",
                "children": []
            }

            for res in resources:
                res_type = res.get("type")
                res_name = res.get("name")
                instances = res.get("instances", [])
                
                if isinstance(instances, list) and len(instances) > 0:
                    attributes = instances[0].get("attributes", {})
                else:
                    continue

                if res_type == "helm_release":
                    metadata_list = attributes.get("metadata", [{}])
                    metadata = metadata_list[0] if metadata_list else {}
                    
                    chart_version = metadata.get("version", "1.0.0")
                    namespace = metadata.get("namespace", "default")
                    status = attributes.get("status", "deployed")
                    
                    raw_values_string = metadata.get("values", "{}")
                    try:
                        values_dict = json.loads(raw_values_string)
                        image_tag = values_dict.get("image", {}).get("tag", "latest")
                    except:
                        image_tag = "latest"

                    root_node["children"].append({
                        "name": attributes.get("name", res_name),
                        "type": "Helm-Chart",
                        "meta_status": status,
                        "meta_namespace": namespace,
                        "meta_version": chart_version,
                        "meta_tag": image_tag,
                        "children": []
                    })

                elif res_type in ["kubernetes_deployment", "kubernetes_deployment_v1"]:
                    metadata = attributes.get("metadata", [{}])
                    actual_name = metadata[0].get("name", res_name) if isinstance(metadata, list) and len(metadata) > 0 else metadata.get("name", res_name) if hasattr(metadata, "get") else res_name
                    
                    root_node["children"].append({
                        "name": actual_name,
                        "type": "Deployment",
                        "meta_status": "Active",
                        "meta_namespace": "default",
                        "meta_version": "v1 (Native K8s)",
                        "meta_tag": "Managed via Deployment spec",
                        "children": []
                    })

            return JsonResponse(root_node)

        except Exception as e:
            return JsonResponse({
                "name": "cloudmon // Fehler",
                "type": "Root",
                "children": [{"name": f"Parsing Fehler: {str(e)}", "type": "Error"}]
            })