package tests

import (
	"strings"
	"testing"

	"hosts-go/internal/core"
	"hosts-go/internal/tui"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestModelSelection(t *testing.T) {
	sample := `127.0.0.1 localhost
192.168.1.10 example.com`
	lines := strings.Split(sample, "\n")
	hf, _, err := core.ParseHostsContent(lines)
	require.NoError(t, err)

	m := tui.NewModel(hf)
	require.NotNil(t, m.SelectedEntry())
	assert.Equal(t, "localhost", m.SelectedEntry().Hostname)

	// Move selection down
	nm, _ := m.Update(tea.KeyMsg{Type: tea.KeyDown})
	m = nm.(tui.Model)
	assert.Equal(t, "example.com", m.SelectedEntry().Hostname)
}

func TestViewModeStatusBar(t *testing.T) {
	sample := `127.0.0.1 localhost
# 192.168.1.10 example.com`
	lines := strings.Split(sample, "\n")
	hf, _, err := core.ParseHostsContent(lines)
	require.NoError(t, err)

	m := tui.NewModel(hf)
	nm, _ := m.Update(tea.WindowSizeMsg{Width: 80, Height: 20})
	m = nm.(tui.Model)
	view := m.View()

	assert.Contains(t, view, "VIEW MODE")
	assert.Contains(t, view, "[✓] localhost")
	assert.Contains(t, view, "[ ] example.com")
}

func TestPaneSwitching(t *testing.T) {
	sample := "127.0.0.1 localhost\n192.168.1.10 example.com"
	lines := strings.Split(sample, "\n")
	hf, _, err := core.ParseHostsContent(lines)
	require.NoError(t, err)

	m := tui.NewModel(hf)
	// Switch focus to detail pane
	nm, _ := m.Update(tea.KeyMsg{Type: tea.KeyTab})
	m = nm.(tui.Model)

	// Attempt to move down; selection should remain on first entry
	nm, _ = m.Update(tea.KeyMsg{Type: tea.KeyDown})
	m = nm.(tui.Model)
	assert.Equal(t, "localhost", m.SelectedEntry().Hostname)
}

func TestEditModeToggleAndActivation(t *testing.T) {
	sample := "127.0.0.1 localhost\n192.168.1.10 example.com"
	lines := strings.Split(sample, "\n")
	hf, _, err := core.ParseHostsContent(lines)
	require.NoError(t, err)

	m := tui.NewModel(hf)

	// enter edit mode
	nm, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'e'}})
	m = nm.(tui.Model)
	assert.Equal(t, tui.EditMode, m.Mode())

	// toggle active state of first entry
	nm, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'a'}})
	m = nm.(tui.Model)
	assert.False(t, m.SelectedEntry().Active)

	// status bar should reflect edit mode
	view := m.View()
	assert.Contains(t, view, "EDIT MODE")
}