package cli

import (
	"bytes"
	"context"
	"errors"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"gitea.lclr.dev/AI/mcp-framework/config"
	"gitea.lclr.dev/AI/mcp-framework/manifest"
	"gitea.lclr.dev/AI/mcp-framework/secretstore"
)

type doctorProfile struct {
	BaseURL string `json:"base_url"`
}

func TestRunDoctorAggregatesCommonChecksAndExtras(t *testing.T) {
	tempHome := t.TempDir()
	t.Setenv("XDG_CONFIG_HOME", tempHome)
	t.Setenv("HOME", tempHome)

	store := config.NewStore[doctorProfile]("doctor-test")
	path, err := store.ConfigPath()
	if err != nil {
		t.Fatalf("ConfigPath returned error: %v", err)
	}

	cfg := config.FileConfig[doctorProfile]{
		Version:        config.CurrentVersion,
		CurrentProfile: "default",
		Profiles: map[string]doctorProfile{
			"default": {BaseURL: "https://api.example.com"},
		},
	}
	if err := store.Save(path, cfg); err != nil {
		t.Fatalf("Save returned error: %v", err)
	}

	manifestDir := t.TempDir()
	if err := os.WriteFile(filepath.Join(manifestDir, "mcp.toml"), []byte("[update]\nlatest_release_url = \"https://example.com/latest\"\n"), 0o600); err != nil {
		t.Fatalf("WriteFile manifest: %v", err)
	}

	secretFactory := func() (secretstore.Store, error) {
		return secretstore.Open(secretstore.Options{
			BackendPolicy: secretstore.BackendEnvOnly,
			LookupEnv: func(name string) (string, bool) {
				if name == "api-token" {
					return "secret", true
				}
				return "", false
			},
		})
	}

	report := RunDoctor(context.Background(), DoctorOptions{
		ConfigCheck:      NewConfigCheck(store),
		SecretStoreCheck: SecretStoreAvailabilityCheck(secretFactory),
		RequiredSecrets: []DoctorSecret{
			{Name: "api-token", Label: "API token"},
		},
		SecretStoreFactory: secretFactory,
		ManifestDir:        manifestDir,
		ConnectivityCheck: func(context.Context) DoctorResult {
			return DoctorResult{Name: "connectivity", Status: DoctorStatusOK, Summary: "service is reachable"}
		},
		ExtraChecks: []DoctorCheck{
			func(context.Context) DoctorResult {
				return DoctorResult{Name: "custom", Status: DoctorStatusWarn, Summary: "non blocking drift"}
			},
		},
	})

	summary := report.Summary()
	if summary.OK != 5 || summary.Warn != 1 || summary.Fail != 0 || summary.Total != 6 {
		t.Fatalf("summary = %#v", summary)
	}
}

func TestNewConfigCheckWarnsWhenConfigIsMissing(t *testing.T) {
	tempHome := t.TempDir()
	t.Setenv("XDG_CONFIG_HOME", tempHome)
	t.Setenv("HOME", tempHome)

	store := config.NewStore[doctorProfile]("doctor-test")
	result := NewConfigCheck(store)(context.Background())

	if result.Status != DoctorStatusWarn {
		t.Fatalf("status = %q, want warn", result.Status)
	}
	if !strings.Contains(result.Detail, "config.json") {
		t.Fatalf("detail = %q, want config path", result.Detail)
	}
}

func TestRequiredSecretsCheckFailsWhenSecretIsMissing(t *testing.T) {
	check := RequiredSecretsCheck(func() (secretstore.Store, error) {
		return secretstore.Open(secretstore.Options{
			BackendPolicy: secretstore.BackendEnvOnly,
			LookupEnv: func(name string) (string, bool) {
				return "", false
			},
		})
	}, []DoctorSecret{{Name: "API_TOKEN", Label: "API token"}})

	result := check(context.Background())
	if result.Status != DoctorStatusFail {
		t.Fatalf("status = %q, want fail", result.Status)
	}
	if !strings.Contains(result.Detail, "API_TOKEN") {
		t.Fatalf("detail = %q, want secret name", result.Detail)
	}
}

func TestManifestCheckUsesValidator(t *testing.T) {
	dir := t.TempDir()
	if err := os.WriteFile(filepath.Join(dir, "mcp.toml"), []byte("[update]\nlatest_release_url = \"https://example.com/latest\"\n"), 0o600); err != nil {
		t.Fatalf("WriteFile manifest: %v", err)
	}

	result := ManifestCheck(dir, func(_ manifest.File, path string) []string {
		_ = path
		return []string{"missing business section"}
	})(context.Background())

	if result.Status != DoctorStatusFail {
		t.Fatalf("status = %q, want fail", result.Status)
	}
}

func TestRenderDoctorReportFormatsStatusesAndSummary(t *testing.T) {
	var out bytes.Buffer
	report := DoctorReport{
		Results: []DoctorResult{
			{Name: "config", Status: DoctorStatusOK, Summary: "config file is readable", Detail: "/tmp/config.json"},
			{Name: "custom", Status: DoctorStatusWarn, Summary: "optional check skipped"},
			{Name: "manifest", Status: DoctorStatusFail, Summary: "manifest is invalid", Detail: "parse error"},
		},
	}

	if err := RenderDoctorReport(&out, report); err != nil {
		t.Fatalf("RenderDoctorReport returned error: %v", err)
	}

	text := out.String()
	for _, needle := range []string{
		"[OK] config: config file is readable",
		"[WARN] custom: optional check skipped",
		"[FAIL] manifest: manifest is invalid",
		"Summary: 1 ok, 1 warning(s), 1 failure(s), 3 total",
	} {
		if !strings.Contains(text, needle) {
			t.Fatalf("output = %q, want substring %q", text, needle)
		}
	}
}

func TestSecretStoreAvailabilityCheckFailsWhenFactoryFails(t *testing.T) {
	result := SecretStoreAvailabilityCheck(func() (secretstore.Store, error) {
		return nil, errors.New("backend missing")
	})(context.Background())

	if result.Status != DoctorStatusFail {
		t.Fatalf("status = %q, want fail", result.Status)
	}
	if !strings.Contains(result.Detail, "backend missing") {
		t.Fatalf("detail = %q", result.Detail)
	}
}