package app_test

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

	"proxyctl/internal/app"
	"proxyctl/internal/profile"
	"proxyctl/internal/target"
)

type maintenanceTarget struct {
	id           string
	available    target.Availability
	inspection   target.Inspection
	checks       []target.Check
	disableErr   error
	disableCalls int
}

func (f *maintenanceTarget) ID() string { return f.id }
func (f *maintenanceTarget) Description() target.Description {
	return target.Description{Name: strings.ToUpper(f.id)}
}
func (f *maintenanceTarget) Availability(context.Context) target.Availability { return f.available }
func (f *maintenanceTarget) Confirmation(bool) string                         { return "" }
func (f *maintenanceTarget) Inspect(context.Context, *profile.Profile) target.Inspection {
	return f.inspection
}
func (f *maintenanceTarget) SetDesired(_ context.Context, enabled bool, _ *profile.Profile) target.OperationResult {
	if !enabled {
		f.disableCalls++
		if f.disableErr == nil {
			f.inspection = target.Inspection{State: target.Disabled, Evidence: "managed state removed"}
		}
	}
	return target.OperationResult{Inspection: f.inspection, Err: f.disableErr}
}
func (f *maintenanceTarget) DiagnosticChecks(context.Context, *profile.Profile) []target.Check {
	return append([]target.Check(nil), f.checks...)
}

type staleFailureTarget struct{ inspectCalls int }

func (*staleFailureTarget) ID() string                      { return "stale" }
func (*staleFailureTarget) Description() target.Description { return target.Description{Name: "stale"} }
func (*staleFailureTarget) Availability(context.Context) target.Availability {
	return target.Availability{Available: true}
}
func (*staleFailureTarget) Confirmation(bool) string { return "" }
func (f *staleFailureTarget) Inspect(context.Context, *profile.Profile) target.Inspection {
	f.inspectCalls++
	if f.inspectCalls == 1 {
		return target.Inspection{State: target.Enabled, Evidence: "initial managed state"}
	}
	return target.Inspection{State: target.External, Evidence: "fresh evidence http://alice:secret@proxy.example:8080"}
}
func (*staleFailureTarget) SetDesired(context.Context, bool, *profile.Profile) target.OperationResult {
	return target.OperationResult{
		Inspection: target.Inspection{State: target.Drifted, Evidence: "stale returned evidence"},
		Err:        errors.New("failed https://bob:hunter2@proxy.example/path"),
	}
}

type recordingLock struct{ held, acquired int }

func (l *recordingLock) Lock(context.Context) (func(), error) {
	l.held++
	l.acquired++
	return func() { l.held-- }, nil
}

type recordingLog struct{ entries []app.LogEntry }

func (l *recordingLog) Write(entry app.LogEntry) error {
	l.entries = append(l.entries, entry)
	return nil
}

func TestDoctorReportsReadOnlyChecksEvidenceAndRedactsCredentials(t *testing.T) {
	adapter := &maintenanceTarget{
		id: "fake", available: target.Availability{Available: true, Evidence: "fake command found"},
		inspection: target.Inspection{State: target.External, Evidence: "found http://alice:secret@proxy.example:8080 in fake settings"},
		checks:     []target.Check{{Name: "required commands", OK: false, Evidence: "helper failed for https://bob:hunter2@proxy.example/path"}, {Name: "write authority", OK: true, Evidence: "settings directory is writable"}},
	}
	maintenance := app.NewMaintenance(profile.State{}, []target.Target{adapter}, nil, nil)

	report := maintenance.Doctor(context.Background(), []target.Check{{Name: "Profile configuration", OK: true, Evidence: "valid"}, {Name: "identity resolution", OK: true, Evidence: "tester (1000)"}})

	if adapter.disableCalls != 0 {
		t.Fatalf("doctor mutated Target %d times", adapter.disableCalls)
	}
	text := report.String()
	for _, want := range []string{"Profile configuration", "identity resolution", "Target availability", "External", "required commands", "write authority", "found http://alice:REDACTED@proxy.example:8080"} {
		if !strings.Contains(text, want) {
			t.Errorf("doctor report missing %q: %s", want, text)
		}
	}
	for _, secret := range []string{"secret", "hunter2"} {
		if strings.Contains(text, secret) {
			t.Errorf("doctor leaked %q: %s", secret, text)
		}
	}
}

func TestApplicationSerializesAndLogsTargetMutations(t *testing.T) {
	adapter := &maintenanceTarget{id: "fake", available: target.Availability{Available: true}, inspection: target.Inspection{State: target.External}}
	lock := &recordingLock{}
	log := &recordingLog{}
	application, err := app.NewWithTargetsAndRuntime(profile.NewFileStore(filepath.Join(t.TempDir(), "profiles.json")), []target.Target{adapter}, lock, log)
	if err != nil {
		t.Fatal(err)
	}
	if result := application.Dispatch(app.Intent{Kind: app.CreateProfile, Profile: profile.Profile{Name: "office", SingleURL: "http://proxy.test:8080"}}); result.Err != nil {
		t.Fatal(result.Err)
	}
	if result := application.Dispatch(app.Intent{Kind: app.ActivateProfile, Name: "office"}); result.Err != nil {
		t.Fatal(result.Err)
	}
	adapter.disableErr = errors.New("failed http://alice:secret@proxy.test/private")
	result := application.Dispatch(app.Intent{Kind: app.SetTargetDesired, TargetID: "fake", Enabled: false})
	if result.Err == nil {
		t.Fatal("Target failure reported success")
	}
	if lock.acquired != 3 || lock.held != 0 {
		t.Fatalf("all mutation lock acquired=%d held=%d", lock.acquired, lock.held)
	}
	if len(log.entries) != 1 || log.entries[0].Operation != "disable" || strings.Contains(log.entries[0].Detail, "secret") || strings.Contains(log.entries[0].Detail, "proxy.test/private") {
		t.Fatalf("Target operation log = %#v", log.entries)
	}
}

func TestResetFailureUsesFreshInspectionForResultAndRedactedLog(t *testing.T) {
	adapter := &staleFailureTarget{}
	log := &recordingLog{}
	result := app.NewMaintenance(profile.State{}, []target.Target{adapter}, &recordingLock{}, log).Reset(context.Background(), true)
	if result.Err == nil || adapter.inspectCalls != 2 || len(result.Targets) != 1 {
		t.Fatalf("reset result=%#v inspect calls=%d", result, adapter.inspectCalls)
	}
	got := result.Targets[0].Inspection
	if got.State != target.External || !strings.Contains(got.Evidence, "fresh evidence") || strings.Contains(got.Evidence, "stale") {
		t.Fatalf("failure inspection = %#v", got)
	}
	if len(log.entries) != 1 || !strings.Contains(log.entries[0].Detail, "fresh inspection External") || strings.Contains(log.entries[0].Detail, "secret") || strings.Contains(log.entries[0].Detail, "hunter2") {
		t.Fatalf("failure log = %#v", log.entries)
	}
}

func TestResetRequiresConfirmationAndReportsTruthfulPartialResults(t *testing.T) {
	good := &maintenanceTarget{id: "good", available: target.Availability{Available: true}, inspection: target.Inspection{State: target.Enabled, Evidence: "managed"}}
	failure := errors.New("remove https://alice:secret@proxy.example failed: permission denied")
	bad := &maintenanceTarget{id: "bad", available: target.Availability{Available: true}, inspection: target.Inspection{State: target.Drifted, Evidence: "managed fragment remains"}, disableErr: failure}
	external := &maintenanceTarget{id: "external", available: target.Availability{Available: true}, inspection: target.Inspection{State: target.External, Evidence: "user owned"}}
	lock := &recordingLock{}
	log := &recordingLog{}
	maintenance := app.NewMaintenance(profile.State{}, []target.Target{good, bad, external}, lock, log)

	cancelled := maintenance.Reset(context.Background(), false)
	if !cancelled.Cancelled || cancelled.Err != nil || good.disableCalls+bad.disableCalls+external.disableCalls != 0 || lock.acquired != 0 {
		t.Fatalf("cancelled reset = %#v, calls %d/%d/%d lock=%d", cancelled, good.disableCalls, bad.disableCalls, external.disableCalls, lock.acquired)
	}

	result := maintenance.Reset(context.Background(), true)
	if result.Err == nil || len(result.Targets) != 3 || good.disableCalls != 1 || bad.disableCalls != 1 || external.disableCalls != 0 {
		t.Fatalf("confirmed reset = %#v, calls %d/%d/%d", result, good.disableCalls, bad.disableCalls, external.disableCalls)
	}
	if result.Targets[0].Inspection.State != target.Disabled || result.Targets[1].Inspection.State != target.Drifted || !result.Targets[2].Skipped {
		t.Fatalf("reset did not preserve per-Target truth: %#v", result.Targets)
	}
	if lock.acquired != 1 || lock.held != 0 {
		t.Fatalf("lock lifecycle acquired=%d held=%d", lock.acquired, lock.held)
	}
	if len(log.entries) != 2 || strings.Contains(log.entries[1].Detail, "secret") {
		t.Fatalf("redacted operation log = %#v", log.entries)
	}
}