package main

import (
	"bytes"
	"context"
	"errors"
	"strings"
	"testing"

	"chub/internal/domain"
	"chub/internal/platform/browser"
	"chub/internal/platform/config"
	"chub/internal/ui"
)

func TestRunCLIRejectsUnknownCommandWithStableCode(t *testing.T) {
	var out bytes.Buffer
	if code := runCLI([]string{"wat"}, &out, &out); code != 2 || !strings.Contains(out.String(), `"invalid_argument"`) {
		t.Fatalf("code=%d output=%s", code, out.String())
	}
}

func TestInstanceStarterBuildsLaunchSpecFromInstanceAndSettings(t *testing.T) {
	launcher := &fakeProcessLauncher{handle: fakeProcessHandle{pid: 4242}}
	resolver := &fakeExecutableResolver{path: `C:\Browser\msedge.exe`}
	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9666}, inspectErr: browser.ErrRemoteDebugEndpointUnavailable}
	starter := instanceStarter{launcher: launcher, resolver: resolver, managedProfiles: fakeManagedProfileInspector{}, externalProfiles: fakeExternalProfileInspector{}, remoteDebug: remote, portAllocator: remote}
	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "edge-a", Browser: "Edge", UserDataDir: `C:\profiles\edge-a`}, ui.SettingsState{EdgePath: `C:\Configured\msedge.exe`, RemoteDebugStartPort: 9666})
	if err != nil || outcome.PID != 4242 || outcome.RemoteDebugPort != 9666 {
		t.Fatalf("Start() = %#v, %v", outcome, err)
	}
	if resolver.kind != domain.BrowserEdge || resolver.configured != `C:\Configured\msedge.exe` {
		t.Fatalf("resolver input = %s, %q", resolver.kind, resolver.configured)
	}
	if launcher.spec.Kind != domain.BrowserEdge || launcher.spec.Executable != resolver.path || launcher.spec.TargetURL != "" || launcher.spec.RemoteDebugPort != 9666 {
		t.Fatalf("launch spec = %#v", launcher.spec)
	}
}

func TestInstanceStarterResolvesSelectedProxyAtLaunch(t *testing.T) {
	launcher := &fakeProcessLauncher{handle: fakeProcessHandle{pid: 4242}}
	resolver := &fakeExecutableResolver{path: `C:\Browser\chrome.exe`}
	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9666}, inspectErr: browser.ErrRemoteDebugEndpointUnavailable}
	proxies := newProxyDirectory()
	proxies.Set([]config.ProxyProfile{{ID: "proxy-sg", Name: "SG", Server: "http://127.0.0.1:8080"}})
	starter := instanceStarter{launcher: launcher, resolver: resolver, managedProfiles: fakeManagedProfileInspector{}, externalProfiles: fakeExternalProfileInspector{}, remoteDebug: remote, portAllocator: remote, proxyResolver: proxies}
	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`, ProxyID: "proxy-sg"}, ui.SettingsState{RemoteDebugStartPort: 9666})
	if err != nil || launcher.spec.ProxyServer != "http://127.0.0.1:8080" {
		t.Fatalf("proxy launch spec = %#v, error = %v", launcher.spec, err)
	}
	_, err = starter.Start(context.Background(), ui.InstanceRow{ID: "missing", Browser: "Chrome", UserDataDir: `C:\profiles\missing`, ProxyID: "gone"}, ui.SettingsState{RemoteDebugStartPort: 9666})
	if err == nil || launcher.calls != 1 {
		t.Fatalf("missing proxy error = %v, launch calls = %d", err, launcher.calls)
	}
}

func TestInstanceStarterAssociatesVerifiedExternalProfileWithoutLaunching(t *testing.T) {
	launcher := &fakeProcessLauncher{handle: fakeProcessHandle{pid: 4242}}
	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9668}}
	starter := instanceStarter{
		launcher:         launcher,
		resolver:         &fakeExecutableResolver{path: `C:\Browser\chrome.exe`},
		managedProfiles:  fakeManagedProfileInspector{},
		externalProfiles: fakeExternalProfileInspector{use: browser.ProfileUse{Occupied: true, PID: 16108, Source: browser.ProfileSourceMessageWindow}},
		remoteDebug:      remote,
		portAllocator:    remote,
	}
	outcome, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666})
	if err != nil || !outcome.External || outcome.PID != 16108 || outcome.RemoteDebugPort != 9668 || outcome.Source != browser.ProfileSourceMessageWindow {
		t.Fatalf("Start() = %#v, %v", outcome, err)
	}
	if launcher.calls != 0 {
		t.Fatalf("external association launched %d processes", launcher.calls)
	}
}

func TestInstanceStarterRejectsUnverifiedExternalProfile(t *testing.T) {
	launcher := &fakeProcessLauncher{handle: fakeProcessHandle{pid: 4242}}
	remote := &fakeRemoteDebugInspector{inspectErr: browser.ErrRemoteDebugEndpointUnavailable}
	starter := instanceStarter{
		launcher:         launcher,
		resolver:         &fakeExecutableResolver{path: `C:\Browser\chrome.exe`},
		managedProfiles:  fakeManagedProfileInspector{},
		externalProfiles: fakeExternalProfileInspector{use: browser.ProfileUse{Occupied: true, PID: 16108, Source: browser.ProfileSourceLock}},
		remoteDebug:      remote,
		portAllocator:    remote,
	}
	_, err := starter.Start(context.Background(), ui.InstanceRow{ID: "chrome-a", Browser: "Chrome", UserDataDir: `C:\profiles\chrome-a`}, ui.SettingsState{RemoteDebugStartPort: 9666})
	if !errors.Is(err, domain.ErrProfileOccupied) {
		t.Fatalf("Start() error = %v", err)
	}
	if launcher.calls != 0 {
		t.Fatalf("unverified external profile launched %d processes", launcher.calls)
	}
}

func TestMergeInstanceConfigPreservesExistingLaunchOptions(t *testing.T) {
	existing := []config.Instance{{ID: "one", Name: "旧名称", Launch: domain.LaunchSpec{Kind: domain.BrowserChrome, UserDataDir: `C:\profiles\old`, ProfileDirectory: "Default", ProxyServer: "https://proxy.local:8443", ExtraArgs: []string{"--window-size=1280,900"}}}}
	updated := mergeInstanceConfig(existing, []ui.InstanceRow{{ID: "one", Name: "新名称", Browser: "Edge", UserDataDir: `C:\profiles\new`, TargetURL: "https://example.com"}})
	if len(updated) != 1 {
		t.Fatalf("instances = %d, want 1", len(updated))
	}
	got := updated[0]
	if got.Name != "新名称" || got.Launch.Kind != domain.BrowserEdge || got.Launch.UserDataDir != `C:\profiles\new` || got.Launch.TargetURL != "https://example.com" {
		t.Fatalf("updated instance = %#v", got)
	}
	if got.Launch.ProfileDirectory != "Default" || got.Launch.ProxyServer != "https://proxy.local:8443" || len(got.Launch.ExtraArgs) != 1 {
		t.Fatalf("existing launch options were lost: %#v", got.Launch)
	}
}

func TestMergeInstanceConfigPersistsProxySelection(t *testing.T) {
	updated := mergeInstanceConfig(nil, []ui.InstanceRow{{ID: "one", Name: "实例", Browser: "Chrome", UserDataDir: `C:\profiles\one`, ProxyID: "proxy-sg"}})
	if len(updated) != 1 || updated[0].ProxyID != "proxy-sg" || updated[0].Launch.ProxyServer != "" {
		t.Fatalf("merged proxy = %#v", updated)
	}
}

func TestInstanceStatusRefresherChecksOnlyConfiguredRows(t *testing.T) {
	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9777}}
	refresher := instanceStatusRefresher{
		managedProfiles:  fakeManagedProfileInspector{use: browser.ProfileUse{Occupied: true, PID: 5432, Source: "chub_registry"}},
		externalProfiles: fakeExternalProfileInspector{},
		remoteDebug:      remote,
	}
	rows := []ui.InstanceRow{{ID: "managed", Browser: "Chrome", UserDataDir: `C:\profiles\managed`, RemoteDebugPort: 9777}}
	results, err := refresher.Refresh(context.Background(), rows)
	if err != nil || len(results) != 1 {
		t.Fatalf("Refresh() = %#v, %v", results, err)
	}
	got := results[0]
	if got.ID != "managed" || got.Status != "运行中" || got.PID != 5432 || got.RemoteDebugPort != 9777 || got.OccupancySource != "chub_registry" {
		t.Fatalf("refresh result = %#v", got)
	}
}

func TestInstanceStatusRefresherAssociatesExternalWithoutLifecycleControl(t *testing.T) {
	remote := &fakeRemoteDebugInspector{endpoint: browser.RemoteDebugEndpoint{Port: 9668}}
	refresher := instanceStatusRefresher{
		managedProfiles:  fakeManagedProfileInspector{},
		externalProfiles: fakeExternalProfileInspector{use: browser.ProfileUse{Occupied: true, PID: 16108, Source: browser.ProfileSourceMessageWindow}},
		remoteDebug:      remote,
	}
	results, err := refresher.Refresh(context.Background(), []ui.InstanceRow{{ID: "external", Browser: "Edge", UserDataDir: `C:\profiles\external`}})
	if err != nil || len(results) != 1 {
		t.Fatalf("Refresh() = %#v, %v", results, err)
	}
	got := results[0]
	if got.Status != "外部已关联" || got.PID != 16108 || got.RemoteDebugPort != 9668 || got.OccupancySource != browser.ProfileSourceMessageWindow {
		t.Fatalf("external refresh result = %#v", got)
	}
}

type fakeExecutableResolver struct {
	path       string
	kind       domain.BrowserKind
	configured string
}

func (r *fakeExecutableResolver) Resolve(_ context.Context, kind domain.BrowserKind, configured string) (string, error) {
	r.kind = kind
	r.configured = configured
	return r.path, nil
}

type fakeProcessLauncher struct {
	spec   domain.LaunchSpec
	handle browser.ProcessHandle
	calls  int
}

func (l *fakeProcessLauncher) Start(_ context.Context, spec domain.LaunchSpec) (browser.ProcessHandle, error) {
	l.spec = spec
	l.calls++
	return l.handle, nil
}

type fakeProcessHandle struct{ pid int }

func (p fakeProcessHandle) PID() int { return p.pid }

func (fakeProcessHandle) Wait(context.Context) (int, error) { return 0, nil }

type fakeManagedProfileInspector struct{ use browser.ProfileUse }

func (i fakeManagedProfileInspector) InspectProfile(context.Context, string) (browser.ProfileUse, error) {
	return i.use, nil
}

type fakeExternalProfileInspector struct {
	use browser.ProfileUse
	err error
}

func (i fakeExternalProfileInspector) InspectProfile(context.Context, domain.BrowserKind, string, int) (browser.ProfileUse, error) {
	return i.use, i.err
}

type fakeRemoteDebugInspector struct {
	endpoint   browser.RemoteDebugEndpoint
	inspectErr error
	waitErr    error
	port       int
}

func (i *fakeRemoteDebugInspector) InspectRemoteDebugEndpoint(context.Context, domain.BrowserKind, string) (browser.RemoteDebugEndpoint, error) {
	return i.endpoint, i.inspectErr
}

func (i *fakeRemoteDebugInspector) WaitForRemoteDebugEndpoint(context.Context, domain.BrowserKind, string) (browser.RemoteDebugEndpoint, error) {
	return i.endpoint, i.waitErr
}

func (i *fakeRemoteDebugInspector) InspectRemoteDebugPort(context.Context, domain.BrowserKind, int) (browser.RemoteDebugEndpoint, error) {
	return i.endpoint, i.inspectErr
}

func (i *fakeRemoteDebugInspector) WaitForRemoteDebugPort(context.Context, domain.BrowserKind, int) (browser.RemoteDebugEndpoint, error) {
	return i.endpoint, i.waitErr
}

func (i *fakeRemoteDebugInspector) FindAvailableRemoteDebugPort(_ context.Context, start int) (int, error) {
	if i.port != 0 {
		return i.port, nil
	}
	return start, nil
}