package unraid

import (
	"context"
	"encoding/json"
	"encoding/pem"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestClientAllowsOnlyReadOperationsAndUsesUnraidAPIKey(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost || r.Header.Get("x-api-key") != "test-token" || r.Header.Get("Authorization") != "" {
			t.Fatalf("unexpected request")
		}
		var request struct {
			Query         string `json:"query"`
			OperationName string `json:"operationName"`
		}
		if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
			t.Fatal(err)
		}
		if request.OperationName != "server" || !strings.HasPrefix(request.Query, "query server ") {
			t.Fatalf("query and operation name must agree: %#v", request)
		}
		_, _ = w.Write([]byte(`{"data":{"server":{"name":"pulse","status":"ONLINE"}}}`))
	}))
	defer server.Close()
	c, err := New(server.URL, "test-token", server.Client())
	if err != nil {
		t.Fatal(err)
	}
	if _, err := c.Query(context.Background(), "server"); err != nil {
		t.Fatal(err)
	}
	if _, err := c.Query(context.Background(), "deleteContainer"); err == nil || !strings.Contains(err.Error(), "read-only") {
		t.Fatalf("unexpected mutation result: %v", err)
	}
}

func TestClientUsesOnlyDocumentedReadOnlySelections(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var request struct {
			Query string `json:"query"`
		}
		if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
			t.Fatal(err)
		}
		if !strings.Contains(request.Query, "docker { containers {") || strings.Contains(strings.ToLower(request.Query), "mutation") {
			t.Fatalf("unexpected query %q", request.Query)
		}
		_, _ = w.Write([]byte(`{"data":{"docker":{"containers":[]}}}`))
	}))
	defer server.Close()
	client, err := New(server.URL, "test-token", server.Client())
	if err != nil {
		t.Fatal(err)
	}
	if _, err := client.Query(context.Background(), "containers"); err != nil {
		t.Fatal(err)
	}
}

func TestRejectsNonHTTPSEndpoint(t *testing.T) {
	if _, err := New("http://unraid.local/graphql", "token", nil); err == nil {
		t.Fatal("expected HTTPS requirement")
	}
}

func TestClientTrustsExplicitCAPEMWithoutDisablingVerification(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, _ = w.Write([]byte(`{"data":{"server":{"name":"Tower","status":"ONLINE"}}}`))
	}))
	defer server.Close()
	certificate := server.Certificate()
	caPEM := pem.EncodeToMemory(&pem.Block{Type: "CERTIFICATE", Bytes: certificate.Raw})
	client, err := NewWithCAPEM(server.URL, "viewer-key", caPEM)
	if err != nil {
		t.Fatal(err)
	}
	if _, err := client.Query(context.Background(), "server"); err != nil {
		t.Fatal(err)
	}
	if _, err := NewWithCAPEM(server.URL, "viewer-key", []byte("not a certificate")); err == nil {
		t.Fatal("expected invalid private CA rejection")
	}
}