package slurm

import (
	"crypto/rand"
	"os"
	"path/filepath"
	"testing"
	"time"
)

func TestNewClientWithOpts_JWTKey_Success(t *testing.T) {
	key := make([]byte, 32)
	if _, err := rand.Read(key); err != nil {
		t.Fatalf("generate key: %v", err)
	}
	dir := t.TempDir()
	keyPath := filepath.Join(dir, "jwt.key")
	if err := os.WriteFile(keyPath, key, 0600); err != nil {
		t.Fatalf("write key file: %v", err)
	}

	client, err := NewClientWithOpts("http://localhost:6820/",
		WithJWTKey(keyPath),
		WithUsername("testuser"),
	)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if client == nil {
		t.Fatal("expected non-nil client")
	}

	transport, ok := client.client.Transport.(*JWTAuthTransport)
	if !ok {
		t.Fatalf("expected *JWTAuthTransport, got %T", client.client.Transport)
	}
	if transport.UserName != "testuser" {
		t.Errorf("expected username %q, got %q", "testuser", transport.UserName)
	}
}

func TestNewClientWithOpts_InvalidKeyPath_Error(t *testing.T) {
	client, err := NewClientWithOpts("http://localhost:6820/",
		WithJWTKey("/nonexistent/key"),
		WithUsername("testuser"),
	)
	if err == nil {
		t.Fatal("expected error for invalid key path, got nil")
	}
	if client != nil {
		t.Fatal("expected nil client on error")
	}
}

func TestNewClientWithOpts_BackwardCompatible(t *testing.T) {
	client, err := NewClientWithOpts("http://localhost:6820/")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if client == nil {
		t.Fatal("expected non-nil client")
	}
	if client.client.Timeout != DefaultTimeout {
		t.Errorf("expected Timeout=%v, got %v", DefaultTimeout, client.client.Timeout)
	}
}

func TestNewClientWithOpts_AllServicesInitialized(t *testing.T) {
	client, err := NewClientWithOpts("http://localhost:6820/")
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	services := []struct {
		name string
		svc  interface{}
	}{
		{"Jobs", client.Jobs},
		{"Nodes", client.Nodes},
		{"Partitions", client.Partitions},
		{"Reservations", client.Reservations},
		{"Diag", client.Diag},
		{"Ping", client.Ping},
		{"Licenses", client.Licenses},
		{"Reconfigure", client.Reconfigure},
		{"Shares", client.Shares},
		{"SlurmdbDiag", client.SlurmdbDiag},
		{"SlurmdbConfig", client.SlurmdbConfig},
		{"SlurmdbTres", client.SlurmdbTres},
		{"SlurmdbQos", client.SlurmdbQos},
		{"SlurmdbAssocs", client.SlurmdbAssocs},
		{"SlurmdbInstances", client.SlurmdbInstances},
		{"SlurmdbUsers", client.SlurmdbUsers},
		{"SlurmdbClusters", client.SlurmdbClusters},
		{"SlurmdbWckeys", client.SlurmdbWckeys},
		{"SlurmdbAccounts", client.SlurmdbAccounts},
		{"SlurmdbJobs", client.SlurmdbJobs},
	}

	for _, s := range services {
		if s.svc == nil {
			t.Errorf("%s service is nil", s.name)
		}
	}
}

func TestWithTokenTTL_Custom(t *testing.T) {
	key := make([]byte, 32)
	if _, err := rand.Read(key); err != nil {
		t.Fatalf("generate key: %v", err)
	}
	dir := t.TempDir()
	keyPath := filepath.Join(dir, "jwt.key")
	if err := os.WriteFile(keyPath, key, 0600); err != nil {
		t.Fatalf("write key file: %v", err)
	}

	client, err := NewClientWithOpts("http://localhost:6820/",
		WithJWTKey(keyPath),
		WithUsername("testuser"),
		WithTokenTTL(1*time.Hour),
	)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if client == nil {
		t.Fatal("expected non-nil client")
	}
}

func TestWithTokenLeeway_Custom(t *testing.T) {
	key := make([]byte, 32)
	if _, err := rand.Read(key); err != nil {
		t.Fatalf("generate key: %v", err)
	}
	dir := t.TempDir()
	keyPath := filepath.Join(dir, "jwt.key")
	if err := os.WriteFile(keyPath, key, 0600); err != nil {
		t.Fatalf("write key file: %v", err)
	}

	client, err := NewClientWithOpts("http://localhost:6820/",
		WithJWTKey(keyPath),
		WithUsername("testuser"),
		WithTokenLeeway(1*time.Minute),
	)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}
	if client == nil {
		t.Fatal("expected non-nil client")
	}
}