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):
        # Holt den State direkt aus deinem Forgejo-HTTP-Backend
        forgejo_url = "http://forgejo:3000/api/v1/repos/bast/boday_tf/terraform/state/sandbox"
        headers = {"Authorization": "token z6xlwg3dSRYZ59zUxfrztDJasG6VkvulFyTwtJQS"}
        
        try:
            response = requests.get(forgejo_url, headers=headers, timeout=5)
            if response.status_code != 200:
                return JsonResponse({"error": "Terraform State konnte nicht geladen werden"}, status=response.status_code)
            
            state_json = response.json()
            resources = state_json.get("resources", [])
            
            ingresses = []
            services = {}
            deployments = {}

            # Flache Terraform-Struktur filtern
            for res in resources:
                res_type = res.get("type")
                res_name = res.get("name")
                instances = res.get("instances", [])
                if not instances: continue
                # act/gitea liefert instanzen als Liste
                if isinstance(instances, list) and len(instances) > 0:
                    attributes = instances[0].get("attributes", {})
                else:
                    attributes = instances.get("attributes", {})

                if res_type == "kubernetes_ingress_v1":
                    ingresses.append({
                        "name": attributes.get("metadata", [{}])[0].get("name", res_name) if isinstance(attributes.get("metadata"), list) else attributes.get("metadata", {}).get("name", res_name),
                        "rules": attributes.get("spec", [{}])[0].get("rule", []) if isinstance(attributes.get("spec"), list) else attributes.get("spec", {}).get("rule", [])
                    })
                elif res_type == "kubernetes_service" or res_type == "kubernetes_service_v1":
                    svc_actual_name = attributes.get("metadata", [{}])[0].get("name", res_name) if isinstance(attributes.get("metadata"), list) else attributes.get("metadata", {}).get("name", res_name)
                    services[svc_actual_name] = {"name": svc_actual_name, "type": "Service"}
                elif res_type == "kubernetes_deployment" or res_type == "kubernetes_deployment_v1":
                    dep_actual_name = attributes.get("metadata", [{}])[0].get("name", res_name) if isinstance(attributes.get("metadata"), list) else attributes.get("metadata", {}).get("name", res_name)
                    deployments[dep_actual_name] = {"name": dep_actual_name, "type": "Deployment"}

            # D3.js Baumhierarchie aufbauen
            root_node = {
                "name": "Forgejo Control Plane",
                "type": "Root",
                "children": []
            }

            for ing in ingresses:
                ing_node = {"name": ing["name"], "type": "Ingress", "children": []}
                
                for rule in ing["rules"]:
                    http_paths = rule.get("http", [{}])[0].get("path", []) if isinstance(rule.get("http"), list) else rule.get("http", {}).get("path", [])
                    for path in http_paths:
                        backend_svc = path.get("backend", [{}])[0].get("service", [{}])[0].get("name") if isinstance(path.get("backend"), list) else path.get("backend", {}).get("service", {}).get("name")
                        
                        if backend_svc in services:
                            svc_node = {"name": backend_svc, "type": "Service", "children": []}
                            
                            for dep_name in deployments.keys():
                                if dep_name in backend_svc or backend_svc in dep_name:
                                    svc_node["children"].append({
                                        "name": dep_name,
                                        "type": "Deployment",
                                        "children": []
                                    })
                            
                            ing_node["children"].append(svc_node)
                
                root_node["children"].append(ing_node)

            return JsonResponse(root_node)

        except Exception as e:
            return JsonResponse({"error": str(e)}, status=500)