package ui

import (
	"strings"
	"testing"

	tea "github.com/charmbracelet/bubbletea"

	"motd-assist/internal/motd"
	"motd-assist/internal/preset"
)

func mustUpdate(m Model, msg tea.Msg) Model {
	next, _ := m.Update(msg)
	return next.(Model)
}

func newTestModel(t *testing.T) Model {
	t.Helper()
	m := New(t.TempDir())
	m = mustUpdate(m, tea.WindowSizeMsg{Width: 120, Height: 40})
	return m
}

func TestViewRendersAllPanes(t *testing.T) {
	m := newTestModel(t)
	scripts := []motd.Script{
		{Name: "00-header", Path: "/x/00-header", Enabled: true},
		{Name: "10-sysinfo", Path: "/x/10-sysinfo", Enabled: false},
	}
	m = mustUpdate(m, discoverMsg{scripts: scripts, host: motd.HostInfo{Hostname: "myhost", Distro: "Ubuntu 24.04", PAM: true}})
	m = mustUpdate(m, previewMsg{version: m.previewVersion, text: "Willkommen auf myhost"})

	view := m.View()
	for _, want := range []string{"Presets", "Scripte", "Live-Vorschau", "00-header", "10-sysinfo", "Willkommen auf myhost", "myhost"} {
		if !strings.Contains(view, want) {
			t.Errorf("View enthält %q nicht", want)
		}
	}
}

func TestToggleAndPlan(t *testing.T) {
	m := newTestModel(t)
	scripts := []motd.Script{
		{Name: "00-header", Path: "/x/00-header", Enabled: true},
		{Name: "10-sysinfo", Path: "/x/10-sysinfo", Enabled: false},
	}
	m = mustUpdate(m, discoverMsg{scripts: scripts})

	// Fokus auf Scripte wechseln und erstes Script ausschalten.
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyTab})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeySpace})

	plan := m.currentPlan()
	if len(plan.Chmod) != 1 || plan.Chmod[0].Name != "00-header" || plan.Chmod[0].Enable {
		t.Errorf("Chmod = %+v, want 00-header aus", plan.Chmod)
	}
	if markers := m.markersByRow(); markers["00-header"] != "aus" {
		t.Errorf("Marker = %q, want aus", markers["00-header"])
	}
}

func TestMoveRowChangesOrder(t *testing.T) {
	m := newTestModel(t)
	scripts := []motd.Script{
		{Name: "00-header", Path: "/x", Enabled: true},
		{Name: "10-sysinfo", Path: "/x", Enabled: true},
	}
	m = mustUpdate(m, discoverMsg{scripts: scripts})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyTab})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("d")}) // nach unten

	if m.working[0].Name != "10-sysinfo" || m.working[1].Name != "00-header" {
		t.Errorf("Reihenfolge = %v, %v", m.working[0].Name, m.working[1].Name)
	}
	if plan := m.currentPlan(); len(plan.Renames) != 2 {
		t.Errorf("Renames = %+v, want 2", plan.Renames)
	}
}

func TestLoadPresetMarksPending(t *testing.T) {
	m := newTestModel(t)
	scripts := []motd.Script{{Name: "00-header", Path: "/x", Enabled: false}}
	m = mustUpdate(m, discoverMsg{scripts: scripts})
	m = mustUpdate(m, presetsMsg{presets: []preset.Preset{{Name: "p1", Scripts: []preset.Entry{{Name: "00-header", Enabled: true}}}}})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyEnter}) // erstes Preset laden

	if plan := m.currentPlan(); len(plan.Chmod) != 1 || !plan.Chmod[0].Enable {
		t.Errorf("Plan = %+v, want 00-header an", plan)
	}
	if m.status == "" {
		t.Error("Statusmeldung nach Preset-Laden erwartet")
	}
}

func TestDiscardResetsWorking(t *testing.T) {
	m := newTestModel(t)
	scripts := []motd.Script{{Name: "00-header", Path: "/x", Enabled: true}}
	m = mustUpdate(m, discoverMsg{scripts: scripts})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyTab})
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeySpace}) // ausschalten
	if m.currentPlan().Empty() {
		t.Fatal("Plan sollte Änderungen haben")
	}
	m = mustUpdate(m, tea.KeyMsg{Type: tea.KeyEsc})
	if !m.currentPlan().Empty() {
		t.Errorf("nach esc sollte der Plan leer sein, ist %+v", m.currentPlan())
	}
}