package main

import (
	"bytes"
	"errors"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"slices"
	"testing"

	"gioui.org/io/key"
	"gioui.org/unit"

	"git.julianfamily.org/keepassgo/clipboard"
	"git.julianfamily.org/keepassgo/session"
	"git.julianfamily.org/keepassgo/vault"
	"git.julianfamily.org/keepassgo/webdav"
)

func TestUIFiltersUsingVaultModelPathsAndSearch(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "1", Title: "Bellagio", Username: "rustyryan", URL: "https://bellagio.example.invalid", Path: []string{"Crew", "Internet"}},
			{ID: "2", Title: "Vault Console", Username: "dannyocean", URL: "https://vault.crew.example.invalid", Path: []string{"Crew", "Internet"}},
			{ID: "3", Title: "Surveillance Console", Username: "codex", URL: "https://surveillance.crew.example.invalid", Path: []string{"Crew", "Home Assistant"}},
		},
	})

	u.currentPath = []string{"Crew", "Internet"}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Bellagio", "Vault Console"}) {
		t.Fatalf("filteredTitles() = %v, want [Bellagio Vault Console]", got)
	}

	u.search.SetText("surveillance")
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Surveillance Console"}) {
		t.Fatalf("search filteredTitles() = %v, want [Surveillance Console]", got)
	}
}

func TestUISearchBehaviorIsConsistentAcrossDesktopAndPhoneLayouts(t *testing.T) {
	t.Parallel()

	modes := []string{"desktop", "phone"}
	for _, mode := range modes {
		mode := mode
		t.Run(mode, func(t *testing.T) {
			t.Parallel()

			u := newUIWithModel(mode, vault.Model{
				Entries: []vault.Entry{
					{ID: "entry-1", Title: "Vault Console", URL: "https://vault.crew.example.invalid", Path: []string{"Root", "Internet"}},
					{ID: "entry-2", Title: "HVAC", URL: "https://climate.example.com", Path: []string{"Root", "Home"}},
				},
				Templates: []vault.Entry{
					{ID: "tpl-1", Title: "Website Login", URL: "https://accounts.example.com", Path: []string{"Templates", "Web"}},
					{ID: "tpl-2", Title: "SSH Login", URL: "ssh://infra.internal", Path: []string{"Templates", "Infra"}},
				},
				RecycleBin: []vault.Entry{
					{ID: "deleted-1", Title: "Deleted Bellagio", URL: "https://bellagio.example.com", Path: []string{"Root", "Internet"}},
					{ID: "deleted-2", Title: "Deleted HVAC", URL: "https://climate.example.com", Path: []string{"Root", "Home"}},
				},
			})

			u.showEntriesSection()
			u.currentPath = []string{"Root", "Internet"}
			u.search.SetText("climate")
			u.filter()
			if got := u.filteredTitles(); !slices.Equal(got, []string{"HVAC"}) {
				t.Fatalf("entries filteredTitles() = %v, want [HVAC]", got)
			}

			u.showTemplatesSection()
			u.currentPath = []string{"Templates", "Web"}
			u.search.SetText("infra")
			u.filter()
			if got := u.filteredTitles(); !slices.Equal(got, []string{"SSH Login"}) {
				t.Fatalf("templates filteredTitles() = %v, want [SSH Login]", got)
			}
			if got := u.visiblePathContexts(); !slices.Equal(got, []string{"Templates / Infra"}) {
				t.Fatalf("templates visiblePathContexts() = %v, want [Templates / Infra]", got)
			}

			u.showRecycleBinSection()
			u.search.SetText("climate")
			u.filter()
			if got := u.filteredTitles(); !slices.Equal(got, []string{"Deleted HVAC"}) {
				t.Fatalf("recycle filteredTitles() = %v, want [Deleted HVAC]", got)
			}
			if got := u.visiblePathContexts(); !slices.Equal(got, []string{"Recycle Bin / Root / Home"}) {
				t.Fatalf("recycle visiblePathContexts() = %v, want [Recycle Bin / Root / Home]", got)
			}
		})
	}
}

func TestUIClearingSearchResetsToCurrentSectionListing(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Templates: []vault.Entry{
			{ID: "tpl-1", Title: "Website Login", Path: []string{"Templates", "Web"}},
			{ID: "tpl-2", Title: "Email Login", Path: []string{"Templates", "Web"}},
			{ID: "tpl-3", Title: "SSH Login", Path: []string{"Templates", "Infra"}},
		},
	})

	u.showTemplatesSection()
	u.currentPath = []string{"Templates", "Web"}
	u.search.SetText("ssh")
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"SSH Login"}) {
		t.Fatalf("filteredTitles() with search = %v, want [SSH Login]", got)
	}

	u.search.SetText("")
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Email Login", "Website Login"}) {
		t.Fatalf("filteredTitles() after clearing search = %v, want [Email Login Website Login]", got)
	}
}

func TestUIChildGroupsComeFromVaultModel(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "1", Title: "Bellagio", Path: []string{"Crew", "Internet"}},
			{ID: "2", Title: "Surveillance Console", Path: []string{"Crew", "Home Assistant"}},
			{ID: "3", Title: "Alma (WA Prep)", Path: []string{"Tricia", "School"}},
		},
	})

	u.currentPath = []string{"Crew"}
	if got := u.childGroups(); !slices.Equal(got, []string{"Home Assistant", "Internet"}) {
		t.Fatalf("childGroups() = %v, want [Home Assistant Internet]", got)
	}
}

func TestUISelectedEntryFollowsApplicationStateSelection(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "1", Title: "Bellagio", Path: []string{"Crew", "Internet"}},
			{ID: "2", Title: "Vault Console", Path: []string{"Crew", "Internet"}},
		},
	})

	u.currentPath = []string{"Crew", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "2"

	got, ok := u.selectedEntry()
	if !ok {
		t.Fatal("selectedEntry() ok = false, want true")
	}

	if got.Title != "Vault Console" {
		t.Fatalf("selectedEntry().Title = %q, want %q", got.Title, "Vault Console")
	}
}

func TestUILockHidesVisibleEntries(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "1", Title: "Bellagio", Path: []string{"Crew", "Internet"}},
		},
	})

	if err := u.state.Lock(); err != nil {
		t.Fatalf("state.Lock() error = %v", err)
	}
	u.filter()

	if got := u.filteredTitles(); len(got) != 0 {
		t.Fatalf("filteredTitles() = %v, want empty while locked", got)
	}
}

func TestUILifecycleActionsCreateSaveOpenLockAndUnlockLocalVault(t *testing.T) {
	t.Parallel()

	u := newUIWithSession("desktop", &session.Manager{})
	u.masterPassword.SetText("correct horse battery staple")

	if err := u.createVaultAction(); err != nil {
		t.Fatalf("createVaultAction() error = %v", err)
	}
	if err := u.state.UpsertEntry(vault.Entry{
		ID:       "vault-console",
		Title:    "Vault Console",
		Username: "dannyocean",
		Password: "token-1",
		URL:      "https://vault.crew.example.invalid",
		Path:     []string{"Root", "Internet"},
	}); err != nil {
		t.Fatalf("UpsertEntry() error = %v", err)
	}

	path := filepath.Join(t.TempDir(), "keepassgo.kdbx")
	u.saveAsPath.SetText(path)
	if err := u.saveAsAction(); err != nil {
		t.Fatalf("saveAsAction() error = %v", err)
	}

	if err := u.lockAction(); err != nil {
		t.Fatalf("lockAction() error = %v", err)
	}
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	if got := u.filteredTitles(); len(got) != 0 {
		t.Fatalf("filteredTitles() = %v, want empty while locked", got)
	}

	if err := u.unlockAction(); err != nil {
		t.Fatalf("unlockAction() error = %v", err)
	}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
		t.Fatalf("filteredTitles() after unlock = %v, want [Vault Console]", got)
	}

	reopened := newUIWithSession("desktop", &session.Manager{})
	reopened.masterPassword.SetText("correct horse battery staple")
	reopened.vaultPath.SetText(path)
	if err := reopened.openVaultAction(); err != nil {
		t.Fatalf("openVaultAction() error = %v", err)
	}
	reopened.currentPath = []string{"Root", "Internet"}
	reopened.filter()
	if got := reopened.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
		t.Fatalf("reopened filteredTitles() = %v, want [Vault Console]", got)
	}
}

func TestUIMasterKeyModesCreateOpenAndUnlockLocalVault(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name        string
		mode        vault.MasterKeyMode
		password    string
		keyFileData []byte
	}{
		{
			name:     "password only",
			mode:     vault.MasterKeyModePasswordOnly,
			password: "correct horse battery staple",
		},
		{
			name:        "key file only",
			mode:        vault.MasterKeyModeKeyFileOnly,
			keyFileData: []byte("key-file-only-material"),
		},
		{
			name:        "composite",
			mode:        vault.MasterKeyModePasswordAndKeyFile,
			password:    "correct horse battery staple",
			keyFileData: []byte("composite-key-material"),
		},
	}

	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			keyFile := ""
			if len(tt.keyFileData) > 0 {
				keyFile = filepath.Join(t.TempDir(), "master.key")
				if err := os.WriteFile(keyFile, tt.keyFileData, 0o600); err != nil {
					t.Fatalf("WriteFile(master.key) error = %v", err)
				}
			}

			u := newUIWithSession("desktop", &session.Manager{})
			u.setMasterKeyMode(tt.mode)
			u.masterPassword.SetText(tt.password)
			u.keyFilePath.SetText(keyFile)

			if err := u.createVaultAction(); err != nil {
				t.Fatalf("createVaultAction() error = %v", err)
			}
			if err := u.state.UpsertEntry(vault.Entry{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			}); err != nil {
				t.Fatalf("UpsertEntry() error = %v", err)
			}

			path := filepath.Join(t.TempDir(), "keepassgo.kdbx")
			u.saveAsPath.SetText(path)
			if err := u.saveAsAction(); err != nil {
				t.Fatalf("saveAsAction() error = %v", err)
			}

			if err := u.lockAction(); err != nil {
				t.Fatalf("lockAction() error = %v", err)
			}
			if err := u.unlockAction(); err != nil {
				t.Fatalf("unlockAction() error = %v", err)
			}

			reopened := newUIWithSession("desktop", &session.Manager{})
			reopened.setMasterKeyMode(tt.mode)
			reopened.masterPassword.SetText(tt.password)
			reopened.keyFilePath.SetText(keyFile)
			reopened.vaultPath.SetText(path)
			if err := reopened.openVaultAction(); err != nil {
				t.Fatalf("openVaultAction() error = %v", err)
			}
			reopened.currentPath = []string{"Root", "Internet"}
			reopened.filter()
			if got := reopened.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
				t.Fatalf("reopened filteredTitles() = %v, want [Vault Console]", got)
			}
		})
	}
}

func TestUIChangeMasterKeyModeForExistingVault(t *testing.T) {
	t.Parallel()

	updated := filepath.Join(t.TempDir(), "updated.key")
	if err := os.WriteFile(updated, []byte("updated-key"), 0o600); err != nil {
		t.Fatalf("WriteFile(updated.key) error = %v", err)
	}

	u := newUIWithSession("desktop", &session.Manager{})
	u.setMasterKeyMode(vault.MasterKeyModePasswordOnly)
	u.masterPassword.SetText("old-password")
	if err := u.createVaultAction(); err != nil {
		t.Fatalf("createVaultAction() error = %v", err)
	}
	if err := u.state.UpsertEntry(vault.Entry{
		ID:    "vault-console",
		Title: "Vault Console",
		Path:  []string{"Root", "Internet"},
	}); err != nil {
		t.Fatalf("UpsertEntry() error = %v", err)
	}

	path := filepath.Join(t.TempDir(), "keepassgo.kdbx")
	u.saveAsPath.SetText(path)
	if err := u.saveAsAction(); err != nil {
		t.Fatalf("saveAsAction() error = %v", err)
	}

	u.setMasterKeyMode(vault.MasterKeyModePasswordAndKeyFile)
	u.masterPassword.SetText("new-password")
	u.keyFilePath.SetText(updated)
	if err := u.changeMasterKeyAction(); err != nil {
		t.Fatalf("changeMasterKeyAction() error = %v", err)
	}
	if err := u.saveAction(); err != nil {
		t.Fatalf("saveAction() error = %v", err)
	}
	if err := u.lockAction(); err != nil {
		t.Fatalf("lockAction() error = %v", err)
	}

	u.masterPassword.SetText("old-password")
	u.keyFilePath.SetText("")
	u.setMasterKeyMode(vault.MasterKeyModePasswordOnly)
	u.runAction("unlock vault", u.unlockAction)
	if u.errorMessage == "" {
		t.Fatal("errorMessage = empty, want visible invalid master key error")
	}

	u.setMasterKeyMode(vault.MasterKeyModePasswordAndKeyFile)
	u.masterPassword.SetText("new-password")
	u.keyFilePath.SetText(updated)
	if err := u.unlockAction(); err != nil {
		t.Fatalf("unlockAction() with updated key error = %v", err)
	}

	reopened := newUIWithSession("desktop", &session.Manager{})
	reopened.setMasterKeyMode(vault.MasterKeyModePasswordAndKeyFile)
	reopened.masterPassword.SetText("new-password")
	reopened.keyFilePath.SetText(updated)
	reopened.vaultPath.SetText(path)
	if err := reopened.openVaultAction(); err != nil {
		t.Fatalf("openVaultAction() with updated key error = %v", err)
	}
	reopened.currentPath = []string{"Root", "Internet"}
	reopened.filter()
	if got := reopened.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
		t.Fatalf("reopened filteredTitles() = %v, want [Vault Console]", got)
	}
}

func TestUIMasterKeyValidationErrorsAreVisible(t *testing.T) {
	t.Parallel()

	tests := []struct {
		name      string
		mode      vault.MasterKeyMode
		password  string
		keyFile   string
		wantError string
	}{
		{
			name:      "password mode requires password",
			mode:      vault.MasterKeyModePasswordOnly,
			wantError: "master password is required",
		},
		{
			name:      "key file mode requires path",
			mode:      vault.MasterKeyModeKeyFileOnly,
			wantError: "key file is required",
		},
		{
			name:      "composite mode requires password",
			mode:      vault.MasterKeyModePasswordAndKeyFile,
			keyFile:   filepath.Join("/tmp", "ignored.key"),
			wantError: "master password is required",
		},
	}

	for _, tt := range tests {
		tt := tt
		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			u := newUIWithSession("desktop", &session.Manager{})
			u.setMasterKeyMode(tt.mode)
			u.masterPassword.SetText(tt.password)
			u.keyFilePath.SetText(tt.keyFile)

			u.runAction("create vault", u.createVaultAction)

			if got := u.errorMessage; got != tt.wantError {
				t.Fatalf("errorMessage = %q, want %q", got, tt.wantError)
			}
			if got := u.statusMessage; got != "" {
				t.Fatalf("statusMessage = %q, want empty on validation error", got)
			}
		})
	}
}

func TestUIUnreadableAndInvalidMasterKeyErrorsAreVisible(t *testing.T) {
	t.Parallel()

	keyFile := filepath.Join(t.TempDir(), "master.key")
	if err := os.WriteFile(keyFile, []byte("key-material"), 0o600); err != nil {
		t.Fatalf("WriteFile(master.key) error = %v", err)
	}

	create := newUIWithSession("desktop", &session.Manager{})
	create.setMasterKeyMode(vault.MasterKeyModeKeyFileOnly)
	create.keyFilePath.SetText(keyFile)
	if err := create.createVaultAction(); err != nil {
		t.Fatalf("createVaultAction() error = %v", err)
	}

	path := filepath.Join(t.TempDir(), "keepassgo.kdbx")
	create.saveAsPath.SetText(path)
	if err := create.saveAsAction(); err != nil {
		t.Fatalf("saveAsAction() error = %v", err)
	}

	unreadable := newUIWithSession("desktop", &session.Manager{})
	unreadable.setMasterKeyMode(vault.MasterKeyModeKeyFileOnly)
	unreadable.keyFilePath.SetText(filepath.Join(t.TempDir(), "missing.key"))
	unreadable.runAction("open vault", unreadable.openVaultAction)
	if got := unreadable.errorMessage; got == "" || got[:14] != "read key file:" {
		t.Fatalf("errorMessage = %q, want read key file error", got)
	}

	wrong := newUIWithSession("desktop", &session.Manager{})
	wrong.setMasterKeyMode(vault.MasterKeyModeKeyFileOnly)
	wrong.keyFilePath.SetText(filepath.Join(t.TempDir(), "wrong.key"))
	if err := os.WriteFile(wrong.keyFilePath.Text(), []byte("wrong-key"), 0o600); err != nil {
		t.Fatalf("WriteFile(wrong.key) error = %v", err)
	}
	wrong.vaultPath.SetText(path)
	wrong.runAction("open vault", wrong.openVaultAction)
	if got := wrong.errorMessage; got == "" || !bytes.Contains([]byte(got), []byte(vault.ErrInvalidMasterKey.Error())) {
		t.Fatalf("errorMessage = %q, want invalid master key error", got)
	}
}

func TestUIOpenRemoteAndSaveThroughConfiguredWebDAVTarget(t *testing.T) {
	t.Parallel()

	key := vault.MasterKey{Password: "correct horse battery staple"}
	model := vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			},
		},
	}

	var putCount int
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.Method {
		case http.MethodGet:
			var encoded bytes.Buffer
			if err := vault.SaveKDBXWithKey(&encoded, model, key); err != nil {
				t.Fatalf("SaveKDBXWithKey() error = %v", err)
			}
			w.Header().Set("ETag", "\"v1\"")
			_, _ = w.Write(encoded.Bytes())
		case http.MethodPut:
			putCount++
			w.Header().Set("ETag", "\"v2\"")
			w.WriteHeader(http.StatusNoContent)
		default:
			t.Fatalf("unexpected method %s", r.Method)
		}
	}))
	defer server.Close()

	u := newUIWithSession("desktop", &session.Manager{})
	u.masterPassword.SetText("correct horse battery staple")
	u.remoteBaseURL.SetText(server.URL)
	u.remotePath.SetText("vaults/main.kdbx")

	if err := u.openRemoteAction(); err != nil {
		t.Fatalf("openRemoteAction() error = %v", err)
	}

	if err := u.state.UpsertEntry(vault.Entry{
		ID:       "vault-console",
		Title:    "Vault Console",
		Username: "dannyocean",
		Password: "token-2",
		URL:      "https://vault.crew.example.invalid",
		Path:     []string{"Root", "Internet"},
	}); err != nil {
		t.Fatalf("UpsertEntry() error = %v", err)
	}

	if err := u.saveAction(); err != nil {
		t.Fatalf("saveAction() error = %v", err)
	}

	if putCount != 1 {
		t.Fatalf("remote PUT count = %d, want 1", putCount)
	}
}

func TestUIMasterKeyInputSupportsKeyFileAndCompositeKeys(t *testing.T) {
	t.Parallel()

	keyFile := filepath.Join(t.TempDir(), "master.key")
	keyData := []byte("key-file-bytes")
	if err := os.WriteFile(keyFile, keyData, 0o600); err != nil {
		t.Fatalf("WriteFile(keyFile) error = %v", err)
	}

	u := newUIWithSession("desktop", &session.Manager{})
	u.setMasterKeyMode(vault.MasterKeyModePasswordAndKeyFile)
	u.masterPassword.SetText("correct horse battery staple")
	u.keyFilePath.SetText(keyFile)

	key, err := u.currentMasterKey()
	if err != nil {
		t.Fatalf("currentMasterKey() error = %v", err)
	}

	if key.Password != "correct horse battery staple" {
		t.Fatalf("MasterKey.Password = %q, want correct horse battery staple", key.Password)
	}
	if !bytes.Equal(key.KeyFileData, keyData) {
		t.Fatalf("MasterKey.KeyFileData = %q, want %q", key.KeyFileData, keyData)
	}
}

func TestUISectionNavigationShowsTemplatesAndRecycleBin(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "entry-1", Title: "Vault Console", Path: []string{"Root", "Internet"}},
		},
		Templates: []vault.Entry{
			{ID: "tpl-1", Title: "Website Login", Path: []string{"Templates", "Web"}},
		},
		RecycleBin: []vault.Entry{
			{ID: "deleted-1", Title: "Deleted Entry", Path: []string{"Root", "Internet"}},
		},
	})

	u.showTemplatesSection()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Website Login"}) {
		t.Fatalf("template filteredTitles() = %v, want [Website Login]", got)
	}

	u.showRecycleBinSection()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Deleted Entry"}) {
		t.Fatalf("recycle filteredTitles() = %v, want [Deleted Entry]", got)
	}

	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
		t.Fatalf("entry filteredTitles() = %v, want [Vault Console]", got)
	}
}

func TestUISavesDuplicatesDeletesAndRestoresEntriesFromTheEditor(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.loadSelectedEntryIntoEditor()
	u.entryPassword.SetText("token-2")

	if err := u.saveEntryAction(); err != nil {
		t.Fatalf("saveEntryAction() error = %v", err)
	}
	u.filter()
	if entry, ok := u.selectedEntry(); !ok || entry.Password != "token-2" {
		t.Fatalf("selectedEntry() = %#v, want updated password token-2", entry)
	}

	if err := u.duplicateSelectedEntryAction(); err != nil {
		t.Fatalf("duplicateSelectedEntryAction() error = %v", err)
	}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console", "Vault Console (Copy)"}) {
		t.Fatalf("filteredTitles() after duplicate = %v, want copy present", got)
	}

	if err := u.deleteSelectedEntryAction(); err != nil {
		t.Fatalf("deleteSelectedEntryAction() error = %v", err)
	}
	u.showRecycleBinSection()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console (Copy)"}) {
		t.Fatalf("recycle filteredTitles() = %v, want deleted copy", got)
	}

	u.state.SelectedEntryID = "vault-console-copy"
	if err := u.restoreSelectedRecycleEntryAction(); err != nil {
		t.Fatalf("restoreSelectedRecycleEntryAction() error = %v", err)
	}
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console", "Vault Console (Copy)"}) {
		t.Fatalf("filteredTitles() after restore = %v, want restored copy", got)
	}
}

func TestUICreatesEntryWithAllSupportedEditorFields(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()

	u.entryID.SetText("bellagio")
	u.entryTitle.SetText("Bellagio")
	u.entryUsername.SetText("rustyryan")
	u.entryPassword.SetText("token-1")
	u.entryURL.SetText("https://bellagio.example.invalid")
	u.entryNotes.SetText("Registrar account")
	u.entryTags.SetText("dns, registrar")
	u.entryPath.SetText("Root / Internet")
	u.entryFields.SetText("Environment=prod\nAccount ID=12345")

	if err := u.saveEntryAction(); err != nil {
		t.Fatalf("saveEntryAction() create error = %v", err)
	}

	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Bellagio"}) {
		t.Fatalf("filteredTitles() = %v, want [Bellagio]", got)
	}

	item, ok := u.selectedEntry()
	if !ok {
		t.Fatal("selectedEntry() ok = false, want created entry")
	}
	if item.Title != "Bellagio" || item.Username != "rustyryan" || item.Password != "token-1" || item.URL != "https://bellagio.example.invalid" {
		t.Fatalf("selectedEntry() = %#v, want created Bellagio credentials", item)
	}
	if item.Notes != "Registrar account" {
		t.Fatalf("selectedEntry().Notes = %q, want %q", item.Notes, "Registrar account")
	}
	if !slices.Equal(item.Tags, []string{"dns", "registrar"}) {
		t.Fatalf("selectedEntry().Tags = %v, want [dns registrar]", item.Tags)
	}
	if item.Fields["Environment"] != "prod" || item.Fields["Account ID"] != "12345" {
		t.Fatalf("selectedEntry().Fields = %#v, want parsed custom fields", item.Fields)
	}
}

func TestUIEditingEntryPathMovesEntryBetweenGroups(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.loadSelectedEntryIntoEditor()
	u.entryPath.SetText("Root / Infrastructure")

	if err := u.saveEntryAction(); err != nil {
		t.Fatalf("saveEntryAction() move error = %v", err)
	}

	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	if got := u.filteredTitles(); len(got) != 0 {
		t.Fatalf("filteredTitles() in old path = %v, want empty after move", got)
	}

	u.currentPath = []string{"Root", "Infrastructure"}
	u.filter()
	if got := u.filteredTitles(); !slices.Equal(got, []string{"Vault Console"}) {
		t.Fatalf("filteredTitles() in new path = %v, want [Vault Console]", got)
	}

	item, ok := u.selectedEntry()
	if !ok {
		t.Fatal("selectedEntry() ok = false, want moved entry")
	}
	if !slices.Equal(item.Path, []string{"Root", "Infrastructure"}) {
		t.Fatalf("selectedEntry().Path = %v, want [Root Infrastructure]", item.Path)
	}
}

func TestUITemplateAndAttachmentActionsWorkThroughEditor(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Templates: []vault.Entry{
			{
				ID:       "tpl-1",
				Title:    "Website Login",
				Username: "template-user",
				Password: "template-password",
				Notes:    "Reusable template",
				Path:     []string{"Templates", "Web"},
			},
		},
	})

	u.showTemplatesSection()
	u.filter()
	u.state.SelectedEntryID = "tpl-1"
	u.loadSelectedEntryIntoEditor()
	u.entryTitle.SetText("Website Login Updated")

	if err := u.saveTemplateAction(); err != nil {
		t.Fatalf("saveTemplateAction() error = %v", err)
	}

	u.entryID.SetText("entry-1")
	u.entryTitle.SetText("Bellagio")
	u.entryUsername.SetText("rustyryan")
	u.entryPassword.SetText("token-1")
	u.entryURL.SetText("https://bellagio.example.invalid")
	u.entryPath.SetText("Root / Internet")
	if err := u.instantiateSelectedTemplateAction(); err != nil {
		t.Fatalf("instantiateSelectedTemplateAction() error = %v", err)
	}

	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "entry-1"
	u.loadSelectedEntryIntoEditor()

	attachmentPath := filepath.Join(t.TempDir(), "token.txt")
	attachmentExportPath := filepath.Join(t.TempDir(), "exported.txt")
	content := []byte("attachment-content")
	if err := os.WriteFile(attachmentPath, content, 0o600); err != nil {
		t.Fatalf("WriteFile(attachmentPath) error = %v", err)
	}

	u.attachmentPath.SetText(attachmentPath)
	u.attachmentName.SetText("token.txt")
	if err := u.addAttachmentAction(); err != nil {
		t.Fatalf("addAttachmentAction() error = %v", err)
	}

	u.exportAttachmentPath.SetText(attachmentExportPath)
	if err := u.exportAttachmentAction(); err != nil {
		t.Fatalf("exportAttachmentAction() error = %v", err)
	}

	exported, err := os.ReadFile(attachmentExportPath)
	if err != nil {
		t.Fatalf("ReadFile(exportAttachmentPath) error = %v", err)
	}
	if !bytes.Equal(exported, content) {
		t.Fatalf("exported attachment = %q, want %q", exported, content)
	}

	if err := u.removeAttachmentAction(); err != nil {
		t.Fatalf("removeAttachmentAction() error = %v", err)
	}

	u.showTemplatesSection()
	u.filter()
	u.state.SelectedEntryID = "tpl-1"
	if err := u.deleteSelectedTemplateAction(); err != nil {
		t.Fatalf("deleteSelectedTemplateAction() error = %v", err)
	}
	u.filter()
	if got := u.filteredTitles(); len(got) != 0 {
		t.Fatalf("template filteredTitles() after delete = %v, want empty", got)
	}
}

func TestUIRestoresSelectedEntryHistoryVersion(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-2",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
				History: []vault.Entry{
					{
						ID:       "vault-console-h1",
						Title:    "Vault Console",
						Username: "dannyocean",
						Password: "token-1",
						URL:      "https://vault.crew.example.invalid",
						Path:     []string{"Root", "Internet"},
					},
				},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.loadSelectedEntryIntoEditor()
	u.historyIndex.SetText("0")

	if err := u.restoreSelectedHistoryAction(); err != nil {
		t.Fatalf("restoreSelectedHistoryAction() error = %v", err)
	}
	u.filter()
	if entry, ok := u.selectedEntry(); !ok || entry.Password != "token-1" {
		t.Fatalf("selectedEntry() = %#v, want restored password token-1", entry)
	}
}

func TestUIKeyboardShortcutActionsDispatchExpectedCommands(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.loadSelectedEntryIntoEditor()

	if err := u.performShortcut(shortcutNewEntry); err != nil {
		t.Fatalf("performShortcut(new-entry) error = %v", err)
	}
	if u.state.SelectedEntryID != "" {
		t.Fatalf("SelectedEntryID = %q, want empty after new-entry shortcut", u.state.SelectedEntryID)
	}

	u.state.SelectedEntryID = "vault-console"
	if err := u.performShortcut(shortcutCopyUser); err != nil {
		t.Fatalf("performShortcut(copy-user) error = %v", err)
	}
	if err := u.performShortcut(shortcutCopyPassword); err != nil {
		t.Fatalf("performShortcut(copy-password) error = %v", err)
	}
	if err := u.performShortcut(shortcutCopyURL); err != nil {
		t.Fatalf("performShortcut(copy-url) error = %v", err)
	}
}

func TestUIKeyboardNavigationMovesAcrossBreadcrumbsListAndDetail(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "bellagio",
				Title:    "Bellagio",
				Username: "rustyryan",
				Path:     []string{"Root", "Internet"},
			},
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Path:     []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()

	if got := u.keyboardFocus; got != focusSearch {
		t.Fatalf("keyboardFocus = %q, want %q", got, focusSearch)
	}

	u.handleKeyPress(key.NameTab, 0)
	if got := u.keyboardFocus; got != breadcrumbFocusID(0) {
		t.Fatalf("keyboardFocus after Tab = %q, want %q", got, breadcrumbFocusID(0))
	}

	u.handleKeyPress(key.NameTab, 0)
	if got := u.keyboardFocus; got != listFocusID(0) {
		t.Fatalf("keyboardFocus after second Tab = %q, want %q", got, listFocusID(0))
	}
	if got := u.state.SelectedEntryID; got != "bellagio" {
		t.Fatalf("SelectedEntryID after list focus = %q, want %q", got, "bellagio")
	}

	u.handleKeyPress(key.NameDownArrow, 0)
	if got := u.keyboardFocus; got != listFocusID(1) {
		t.Fatalf("keyboardFocus after Down = %q, want %q", got, listFocusID(1))
	}
	if got := u.state.SelectedEntryID; got != "vault-console" {
		t.Fatalf("SelectedEntryID after Down = %q, want %q", got, "vault-console")
	}

	u.handleKeyPress(key.NameTab, 0)
	if got := u.keyboardFocus; got != detailFocusID(detailFieldTitle) {
		t.Fatalf("keyboardFocus after detail Tab = %q, want %q", got, detailFocusID(detailFieldTitle))
	}
}

func TestUIKeyboardNavigationActivatesBreadcrumbs(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:    "vault-console",
				Title: "Vault Console",
				Path:  []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.keyboardFocus = breadcrumbFocusID(0)

	u.handleKeyPress(key.NameRightArrow, 0)
	if got := u.keyboardFocus; got != breadcrumbFocusID(1) {
		t.Fatalf("keyboardFocus after Right = %q, want %q", got, breadcrumbFocusID(1))
	}

	u.handleKeyPress(key.NameReturn, 0)
	if got := u.currentPath; !slices.Equal(got, []string{"Root"}) {
		t.Fatalf("currentPath after breadcrumb activation = %v, want [Root]", got)
	}
}

func TestUIKeyboardShortcutsMoveFocusForSearchAndNewEntry(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:       "vault-console",
				Title:    "Vault Console",
				Username: "dannyocean",
				Password: "token-1",
				URL:      "https://vault.crew.example.invalid",
				Path:     []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.loadSelectedEntryIntoEditor()
	u.keyboardFocus = listFocusID(0)

	u.handleKeyPress("F", key.ModShortcut)
	if got := u.keyboardFocus; got != focusSearch {
		t.Fatalf("keyboardFocus after shortcut search = %q, want %q", got, focusSearch)
	}

	u.handleKeyPress("N", key.ModShortcut)
	if got := u.state.SelectedEntryID; got != "" {
		t.Fatalf("SelectedEntryID after shortcut new-entry = %q, want empty", got)
	}
	if got := u.keyboardFocus; got != detailFocusID(detailFieldTitle) {
		t.Fatalf("keyboardFocus after shortcut new-entry = %q, want %q", got, detailFocusID(detailFieldTitle))
	}
}

func TestUIAccessibilityLabelsDescribeFocusableControls(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{
				ID:    "vault-console",
				Title: "Vault Console",
				Path:  []string{"Root", "Internet"},
			},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()

	if got := u.accessibilityLabel(focusSearch); got != "Search vault" {
		t.Fatalf("accessibilityLabel(search) = %q, want %q", got, "Search vault")
	}
	if got := u.accessibilityLabel(breadcrumbFocusID(1)); got != "Navigate to Root" {
		t.Fatalf("accessibilityLabel(breadcrumb) = %q, want %q", got, "Navigate to Root")
	}
	if got := u.accessibilityLabel(listFocusID(0)); got != "Select entry Vault Console" {
		t.Fatalf("accessibilityLabel(list) = %q, want %q", got, "Select entry Vault Console")
	}
	if got := u.accessibilityLabel(detailFocusID(detailFieldPassword)); got != "Edit Password" {
		t.Fatalf("accessibilityLabel(detail password) = %q, want %q", got, "Edit Password")
	}
}

func TestFieldFocusAppearanceScalesForHighDPI(t *testing.T) {
	t.Parallel()

	lo := fieldFocusAppearance(unit.Metric{PxPerDp: 1, PxPerSp: 1}, true)
	hi := fieldFocusAppearance(unit.Metric{PxPerDp: 2.5, PxPerSp: 2.5}, true)
	unfocused := fieldFocusAppearance(unit.Metric{PxPerDp: 1, PxPerSp: 1}, false)

	if got := lo.MinHeight; got != 44 {
		t.Fatalf("fieldFocusAppearance(low).MinHeight = %d, want 44", got)
	}
	if got := hi.MinHeight; got != 110 {
		t.Fatalf("fieldFocusAppearance(high).MinHeight = %d, want 110", got)
	}
	if got := lo.OutlineWidth; got < 2 {
		t.Fatalf("fieldFocusAppearance(low).OutlineWidth = %d, want >= 2", got)
	}
	if hi.OutlineWidth <= lo.OutlineWidth {
		t.Fatalf("fieldFocusAppearance(high).OutlineWidth = %d, want > %d", hi.OutlineWidth, lo.OutlineWidth)
	}
	if lo.OutlineColor == unfocused.OutlineColor {
		t.Fatalf("fieldFocusAppearance().OutlineColor focused = %#v, want distinct from unfocused %#v", lo.OutlineColor, unfocused.OutlineColor)
	}
}

func TestUIActionErrorsAndStatusMessagesAreCapturedForDisplay(t *testing.T) {
	t.Parallel()

	u := newUIWithSession("desktop", &session.Manager{})
	u.vaultPath.SetText("/does/not/exist.kdbx")
	u.masterPassword.SetText("correct horse battery staple")

	u.runAction("open vault", u.openVaultAction)
	if u.errorMessage == "" {
		t.Fatal("errorMessage = empty, want visible action error")
	}

	u = newUIWithModel("desktop", vault.Model{
		Entries: []vault.Entry{
			{ID: "vault-console", Title: "Vault Console", Username: "dannyocean", Password: "token-1", URL: "https://vault.crew.example.invalid", Path: []string{"Root", "Internet"}},
		},
	})
	u.showEntriesSection()
	u.currentPath = []string{"Root", "Internet"}
	u.filter()
	u.state.SelectedEntryID = "vault-console"
	u.runAction("copy username", func() error { return u.copySelectedFieldAction(clipboard.TargetUsername) })
	if u.statusMessage == "" {
		t.Fatal("statusMessage = empty, want visible success status")
	}
}

func TestUILockSurfacePromptsForMasterKeyMaterial(t *testing.T) {
	t.Parallel()

	u := newUIWithSession("desktop", &session.Manager{})
	u.masterPassword.SetText("correct horse battery staple")

	if err := u.createVaultAction(); err != nil {
		t.Fatalf("createVaultAction() error = %v", err)
	}
	if err := u.lockAction(); err != nil {
		t.Fatalf("lockAction() error = %v", err)
	}

	got := u.sessionSurface()
	if !got.Locked {
		t.Fatal("sessionSurface().Locked = false, want true")
	}
	if got.Title != "Vault locked" {
		t.Fatalf("sessionSurface().Title = %q, want %q", got.Title, "Vault locked")
	}
	if got.Message != "Enter a master password, choose a key file, or provide both to unlock the vault." {
		t.Fatalf("sessionSurface().Message = %q, want unlock prompt", got.Message)
	}

	if msg := u.listEmptyMessage(); msg != "Unlock the vault to browse entries and groups." {
		t.Fatalf("listEmptyMessage() = %q, want locked list prompt", msg)
	}
	if msg := u.detailPlaceholderMessage(); msg != "Unlock the vault to inspect entries, attachments, and history." {
		t.Fatalf("detailPlaceholderMessage() = %q, want locked detail prompt", msg)
	}
}

func TestUIEmptyStatesExplainCurrentSectionAndSearch(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{})

	if msg := u.listEmptyMessage(); msg != "Create or open a vault, then add an entry to get started." {
		t.Fatalf("listEmptyMessage() = %q, want empty entries guidance", msg)
	}

	u.search.SetText("bellagio")
	u.filter()
	if msg := u.listEmptyMessage(); msg != `No entries match "bellagio". Clear or refine the search.` {
		t.Fatalf("search listEmptyMessage() = %q, want search guidance", msg)
	}

	u.search.SetText("")
	u.showTemplatesSection()
	if msg := u.listEmptyMessage(); msg != "No templates yet. Save a reusable entry as a template." {
		t.Fatalf("template listEmptyMessage() = %q, want template empty guidance", msg)
	}

	u.showRecycleBinSection()
	if msg := u.listEmptyMessage(); msg != "Recycle Bin is empty." {
		t.Fatalf("recycle listEmptyMessage() = %q, want recycle empty guidance", msg)
	}
}

func TestUIBannerSurfacePrefersLoadingThenErrorThenStatus(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{})
	u.loadingMessage = "Opening vault..."
	if got := u.bannerSurface(); got.Kind != bannerLoading || got.Message != "Opening vault..." {
		t.Fatalf("bannerSurface() with loading = %#v, want loading banner", got)
	}

	u.loadingMessage = ""
	u.errorMessage = "save failed"
	if got := u.bannerSurface(); got.Kind != bannerError || got.Message != "save failed" {
		t.Fatalf("bannerSurface() with error = %#v, want error banner", got)
	}

	u.errorMessage = ""
	u.statusMessage = "save complete"
	if got := u.bannerSurface(); got.Kind != bannerStatus || got.Message != "save complete" {
		t.Fatalf("bannerSurface() with status = %#v, want status banner", got)
	}
}

func TestUIRunActionNormalizesRemoteSaveConflictsForDisplay(t *testing.T) {
	t.Parallel()

	u := newUIWithModel("desktop", vault.Model{})
	u.runAction("save vault", func() error {
		return errors.New("save remote vaults/main.kdbx: " + webdav.ErrConflict.Error())
	})

	if got := u.errorMessage; got != "Save conflict: the remote vault changed. Reopen it and retry the save." {
		t.Fatalf("errorMessage = %q, want normalized save conflict guidance", got)
	}
	if got := u.statusMessage; got != "" {
		t.Fatalf("statusMessage = %q, want empty on conflict", got)
	}
}

func TestUIUsesKeePassGOProductCopy(t *testing.T) {
	t.Parallel()

	if productName != "KeePassGO" {
		t.Fatalf("productName = %q, want %q", productName, "KeePassGO")
	}
	if desktopSubtitle != "KeePass-compatible password management for desktop-first workflows" {
		t.Fatalf("desktopSubtitle = %q, want updated product subtitle", desktopSubtitle)
	}
}