package api

import (
	"bytes"
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/rcourtman/pulse-go-rewrite/internal/config"
	"github.com/rcourtman/pulse-go-rewrite/internal/monitoring"
	"github.com/rcourtman/pulse-go-rewrite/internal/websocket"
	agentsk8s "github.com/rcourtman/pulse-go-rewrite/pkg/agents/kubernetes"
)

func newKubernetesAgentHandlers(t *testing.T, cfg *config.Config) (*KubernetesAgentHandlers, *monitoring.Monitor) {
	t.Helper()

	if cfg == nil {
		cfg = &config.Config{DataPath: t.TempDir()}
	}
	if cfg.DataPath == "" {
		cfg.DataPath = t.TempDir()
	}

	monitor, err := monitoring.New(cfg)
	if err != nil {
		t.Fatalf("monitoring.New: %v", err)
	}
	t.Cleanup(func() { monitor.Stop() })

	hub := websocket.NewHub(nil)
	handler := NewKubernetesAgentHandlers(nil, monitor, hub)
	return handler, monitor
}

func seedKubernetesCluster(t *testing.T, monitor *monitoring.Monitor) string {
	t.Helper()

	report := agentsk8s.Report{
		Agent: agentsk8s.AgentInfo{
			ID:              "agent-1",
			Version:         "1.0.0",
			IntervalSeconds: 30,
		},
		Cluster: agentsk8s.ClusterInfo{
			ID:      "cluster-1",
			Name:    "cluster-1",
			Version: "1.28.0",
		},
		Nodes: []agentsk8s.Node{
			{Name: "node-1", Ready: true},
		},
		Pods: []agentsk8s.Pod{
			{Name: "pod-1", Namespace: "default", Phase: "Running"},
		},
		Timestamp: time.Now().UTC(),
	}

	cluster, err := monitor.ApplyKubernetesReport(report, nil)
	if err != nil {
		t.Fatalf("ApplyKubernetesReport: %v", err)
	}
	if cluster.ID == "" {
		t.Fatalf("expected cluster ID to be set")
	}
	return cluster.ID
}

func TestKubernetesAgentHandlers_SetMonitorGetMonitor(t *testing.T) {
	handler, monitor := newKubernetesAgentHandlers(t, nil)

	other, err := monitoring.New(&config.Config{DataPath: t.TempDir()})
	if err != nil {
		t.Fatalf("monitoring.New: %v", err)
	}
	t.Cleanup(func() { other.Stop() })

	handler.SetMonitor(other)
	if got := handler.getMonitor(context.Background()); got != other {
		t.Fatalf("getMonitor = %v, want %v", got, other)
	}

	handler.SetMonitor(monitor)
	if got := handler.getMonitor(context.Background()); got != monitor {
		t.Fatalf("getMonitor = %v, want %v", got, monitor)
	}
}

func TestKubernetesAgentHandlers_HandleReport(t *testing.T) {
	handler, _ := newKubernetesAgentHandlers(t, nil)

	report := agentsk8s.Report{
		Agent: agentsk8s.AgentInfo{
			ID:              "agent-2",
			Version:         "1.0.0",
			IntervalSeconds: 30,
		},
		Cluster: agentsk8s.ClusterInfo{
			ID:      "cluster-2",
			Name:    "cluster-2",
			Version: "1.28.0",
		},
		Timestamp: time.Now().UTC(),
	}
	body, _ := json.Marshal(report)

	req := httptest.NewRequest(http.MethodPost, "/api/agents/kubernetes/report", bytes.NewReader(body))
	rec := httptest.NewRecorder()

	handler.HandleReport(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleClusterActions(t *testing.T) {
	handler, _ := newKubernetesAgentHandlers(t, nil)

	req := httptest.NewRequest(http.MethodPost, "/api/agents/kubernetes/clusters/cluster-1/allow-reenroll", nil)
	rec := httptest.NewRecorder()

	handler.HandleClusterActions(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleDeleteCluster(t *testing.T) {
	handler, monitor := newKubernetesAgentHandlers(t, nil)
	clusterID := seedKubernetesCluster(t, monitor)

	req := httptest.NewRequest(http.MethodDelete, "/api/agents/kubernetes/clusters/"+clusterID, nil)
	rec := httptest.NewRecorder()

	handler.HandleDeleteCluster(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleAllowReenroll(t *testing.T) {
	handler, _ := newKubernetesAgentHandlers(t, nil)

	req := httptest.NewRequest(http.MethodPost, "/api/agents/kubernetes/clusters/cluster-1/allow-reenroll", nil)
	rec := httptest.NewRecorder()

	handler.HandleAllowReenroll(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleUnhideCluster(t *testing.T) {
	handler, monitor := newKubernetesAgentHandlers(t, nil)
	clusterID := seedKubernetesCluster(t, monitor)

	req := httptest.NewRequest(http.MethodPut, "/api/agents/kubernetes/clusters/"+clusterID+"/unhide", nil)
	rec := httptest.NewRecorder()

	handler.HandleUnhideCluster(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleMarkPendingUninstall(t *testing.T) {
	handler, monitor := newKubernetesAgentHandlers(t, nil)
	clusterID := seedKubernetesCluster(t, monitor)

	req := httptest.NewRequest(http.MethodPut, "/api/agents/kubernetes/clusters/"+clusterID+"/pending-uninstall", nil)
	rec := httptest.NewRecorder()

	handler.HandleMarkPendingUninstall(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}

func TestKubernetesAgentHandlers_HandleSetCustomDisplayName(t *testing.T) {
	handler, monitor := newKubernetesAgentHandlers(t, nil)
	clusterID := seedKubernetesCluster(t, monitor)

	body := []byte(`{"displayName":"Custom Cluster"}`)
	req := httptest.NewRequest(http.MethodPut, "/api/agents/kubernetes/clusters/"+clusterID+"/display-name", bytes.NewReader(body))
	rec := httptest.NewRecorder()

	handler.HandleSetCustomDisplayName(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200: %s", rec.Code, rec.Body.String())
	}
}