package main

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

	"proxyctl/internal/operationlock"
	"proxyctl/internal/oplog"
	"proxyctl/internal/profile"
	"proxyctl/internal/target"
)

type processFakeTarget struct {
	id    string
	state target.State
	err   error
	calls int
}

func (f *processFakeTarget) ID() string                      { return f.id }
func (f *processFakeTarget) Description() target.Description { return target.Description{Name: f.id} }
func (f *processFakeTarget) Availability(context.Context) target.Availability {
	return target.Availability{Available: true, Evidence: "fake executable found"}
}
func (f *processFakeTarget) Inspect(context.Context, *profile.Profile) target.Inspection {
	return target.Inspection{State: f.state, Evidence: "fake evidence for http://alice:secret@proxy.test"}
}
func (f *processFakeTarget) SetDesired(context.Context, bool, *profile.Profile) target.OperationResult {
	f.calls++
	if f.err == nil {
		f.state = target.Disabled
	}
	return target.OperationResult{Inspection: target.Inspection{State: f.state, Evidence: "re-inspected fake state"}, Err: f.err}
}
func (f *processFakeTarget) DiagnosticChecks(context.Context, *profile.Profile) []target.Check {
	return []target.Check{{Name: "required commands", OK: true, Evidence: "fake helper found"}, {Name: "write authority", OK: true, Evidence: "fake location writable"}}
}

func TestDoctorCommandUsesFakeTargetsAndIsolatedXDGWithoutMutation(t *testing.T) {
	xdg := filepath.Join(t.TempDir(), "xdg-config")
	store := profile.NewFileStore(filepath.Join(xdg, "proxyctl", "profiles.json"))
	fake := &processFakeTarget{id: "fake", state: target.External}
	var output bytes.Buffer
	if err := runMaintenanceCommand([]string{"doctor"}, strings.NewReader(""), &output, store, []target.Target{fake}, nil, nil, []target.Check{{Name: "identity resolution", OK: true, Evidence: "fake user"}, {Name: "storage permissions", OK: true, Evidence: xdg}}); err != nil {
		t.Fatal(err)
	}
	text := output.String()
	for _, want := range []string{"Profile validity", "identity resolution", "storage permissions", "Target availability", "External", "required commands", "write authority"} {
		if !strings.Contains(text, want) {
			t.Errorf("doctor output missing %q: %s", want, text)
		}
	}
	if strings.Contains(text, "secret") {
		t.Fatalf("doctor leaked credentials: %s", text)
	}
	if fake.calls != 0 {
		t.Fatalf("doctor mutated fake Target %d times", fake.calls)
	}
	if _, err := os.Stat(xdg); !os.IsNotExist(err) {
		t.Fatalf("doctor created isolated XDG path: %v", err)
	}
}

func TestDoctorStoragePermissionCheckIsReadOnly(t *testing.T) {
	path := filepath.Join(t.TempDir(), "proxyctl", "profiles.json")
	writeConfig(t, path, `{"profiles":[]}`)
	if err := os.Chmod(path, 0o644); err != nil {
		t.Fatal(err)
	}
	configuration := profile.Configuration{Path: path, Owner: profile.UserIdentity{UID: os.Getuid(), GID: os.Getgid()}}
	checks := diagnosticChecks(configuration)
	if checks[1].OK || !strings.Contains(checks[1].Evidence, "want 600") {
		t.Fatalf("storage check = %#v", checks[1])
	}
	info, err := os.Stat(path)
	if err != nil {
		t.Fatal(err)
	}
	if info.Mode().Perm() != 0o644 {
		t.Fatalf("doctor permission check changed mode to %o", info.Mode().Perm())
	}
}

func TestResetCommandCancellationAndTruthfulPartialFailureWithFakeTargets(t *testing.T) {
	root := t.TempDir()
	config := filepath.Join(root, "xdg-config", "proxyctl", "profiles.json")
	writeConfig(t, config, `{"profiles":[]}`)
	store := profile.NewFileStore(config)
	good := &processFakeTarget{id: "good", state: target.Enabled}
	bad := &processFakeTarget{id: "bad", state: target.Drifted, err: errors.New("remove http://bob:hunter2@proxy.test failed")}
	external := &processFakeTarget{id: "external", state: target.External}
	stateDir := filepath.Join(root, "xdg-state", "proxyctl")
	lock := operationlock.New(filepath.Join(stateDir, "operation.lock"))
	logger := oplog.New(filepath.Join(stateDir, "operations.log"), 1024, 1)

	var output bytes.Buffer
	if err := runMaintenanceCommand([]string{"reset"}, strings.NewReader("no\n"), &output, store, []target.Target{good, bad, external}, lock, logger, nil); err != nil {
		t.Fatal(err)
	}
	if good.calls+bad.calls+external.calls != 0 || !strings.Contains(output.String(), "cancelled") {
		t.Fatalf("cancel result output=%q calls=%d/%d/%d", output.String(), good.calls, bad.calls, external.calls)
	}

	output.Reset()
	err := runMaintenanceCommand([]string{"reset"}, strings.NewReader("yes\n"), &output, store, []target.Target{good, bad, external}, lock, logger, nil)
	if err == nil {
		t.Fatal("partial reset returned success")
	}
	text := output.String()
	if good.calls != 1 || bad.calls != 1 || external.calls != 0 || !strings.Contains(text, "good: reset (Disabled)") || !strings.Contains(text, "bad: failed (Drifted)") || !strings.Contains(text, "external: skipped (External)") {
		t.Fatalf("partial reset output=%q calls=%d/%d/%d", text, good.calls, bad.calls, external.calls)
	}
	if strings.Contains(text, "hunter2") || strings.Contains(err.Error(), "hunter2") {
		t.Fatalf("reset leaked credentials: output=%q err=%v", text, err)
	}
	logData, readErr := os.ReadFile(filepath.Join(stateDir, "operations.log"))
	if readErr != nil {
		t.Fatal(readErr)
	}
	if strings.Contains(string(logData), "hunter2") || strings.Contains(string(logData), "bob:") {
		t.Fatalf("log leaked full authenticated URL: %s", logData)
	}
}