package tui

import (
	"github.com/karol-broda/snitch/internal/collector"
	"testing"
	"time"

	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/x/exp/teatest"
)

func TestTUI_InitialState(t *testing.T) {
	m := New(Options{
		Theme:    "dark",
		Interval: time.Second,
	})

	if m.showTCP != true {
		t.Error("expected showTCP to be true by default")
	}
	if m.showUDP != true {
		t.Error("expected showUDP to be true by default")
	}
	if m.showListening != true {
		t.Error("expected showListening to be true by default")
	}
	if m.showEstablished != true {
		t.Error("expected showEstablished to be true by default")
	}
}

func TestTUI_FilterOptions(t *testing.T) {
	m := New(Options{
		Theme:     "dark",
		Interval:  time.Second,
		TCP:       true,
		UDP:       false,
		FilterSet: true,
	})

	if m.showTCP != true {
		t.Error("expected showTCP to be true")
	}
	if m.showUDP != false {
		t.Error("expected showUDP to be false")
	}
}

func TestTUI_MatchesFilters(t *testing.T) {
	m := New(Options{
		Theme:       "dark",
		Interval:    time.Second,
		TCP:         true,
		UDP:         false,
		Listening:   true,
		Established: false,
		FilterSet:   true,
	})

	tests := []struct {
		name     string
		conn     collector.Connection
		expected bool
	}{
		{
			name:     "tcp listen matches",
			conn:     collector.Connection{Proto: "tcp", State: "LISTEN"},
			expected: true,
		},
		{
			name:     "tcp6 listen matches",
			conn:     collector.Connection{Proto: "tcp6", State: "LISTEN"},
			expected: true,
		},
		{
			name:     "udp listen does not match",
			conn:     collector.Connection{Proto: "udp", State: "LISTEN"},
			expected: false,
		},
		{
			name:     "tcp established does not match",
			conn:     collector.Connection{Proto: "tcp", State: "ESTABLISHED"},
			expected: false,
		},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			result := m.matchesFilters(tc.conn)
			if result != tc.expected {
				t.Errorf("matchesFilters() = %v, want %v", result, tc.expected)
			}
		})
	}
}

func TestTUI_MatchesSearch(t *testing.T) {
	m := New(Options{Theme: "dark"})
	m.searchQuery = "firefox"

	tests := []struct {
		name     string
		conn     collector.Connection
		expected bool
	}{
		{
			name:     "process name matches",
			conn:     collector.Connection{Process: "firefox"},
			expected: true,
		},
		{
			name:     "process name case insensitive",
			conn:     collector.Connection{Process: "Firefox"},
			expected: true,
		},
		{
			name:     "no match",
			conn:     collector.Connection{Process: "chrome"},
			expected: false,
		},
		{
			name:     "matches in address",
			conn:     collector.Connection{Raddr: "firefox.com"},
			expected: true,
		},
	}

	for _, tc := range tests {
		t.Run(tc.name, func(t *testing.T) {
			result := m.matchesSearch(tc.conn)
			if result != tc.expected {
				t.Errorf("matchesSearch() = %v, want %v", result, tc.expected)
			}
		})
	}
}

func TestTUI_KeyBindings(t *testing.T) {
	tm := teatest.NewTestModel(t, New(Options{Theme: "dark", Interval: time.Hour}))

	// test quit with 'q'
	tm.Send(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'q'}})

	tm.WaitFinished(t, teatest.WithFinalTimeout(time.Second*3))
}

func TestTUI_ToggleFilters(t *testing.T) {
	m := New(Options{Theme: "dark", Interval: time.Hour})

	// initial state: all filters on
	if m.showTCP != true || m.showUDP != true {
		t.Fatal("expected all protocol filters on initially")
	}

	// toggle TCP with 't'
	newModel, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'t'}})
	m = newModel.(model)

	if m.showTCP != false {
		t.Error("expected showTCP to be false after toggle")
	}

	// toggle UDP with 'u'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'u'}})
	m = newModel.(model)

	if m.showUDP != false {
		t.Error("expected showUDP to be false after toggle")
	}

	// toggle listening with 'l'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'l'}})
	m = newModel.(model)

	if m.showListening != false {
		t.Error("expected showListening to be false after toggle")
	}

	// toggle established with 'e'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'e'}})
	m = newModel.(model)

	if m.showEstablished != false {
		t.Error("expected showEstablished to be false after toggle")
	}
}

func TestTUI_HelpToggle(t *testing.T) {
	m := New(Options{Theme: "dark", Interval: time.Hour})

	if m.showHelp != false {
		t.Fatal("expected showHelp to be false initially")
	}

	// toggle help with '?'
	newModel, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'?'}})
	m = newModel.(model)

	if m.showHelp != true {
		t.Error("expected showHelp to be true after toggle")
	}

	// toggle help off
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'?'}})
	m = newModel.(model)

	if m.showHelp != false {
		t.Error("expected showHelp to be false after second toggle")
	}
}

func TestTUI_CursorNavigation(t *testing.T) {
	m := New(Options{Theme: "dark", Interval: time.Hour})

	// add some test data
	m.connections = []collector.Connection{
		{PID: 1, Process: "proc1", Proto: "tcp", State: "LISTEN"},
		{PID: 2, Process: "proc2", Proto: "tcp", State: "LISTEN"},
		{PID: 3, Process: "proc3", Proto: "tcp", State: "LISTEN"},
	}

	if m.cursor != 0 {
		t.Fatal("expected cursor at 0 initially")
	}

	// move down with 'j'
	newModel, _ := m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'j'}})
	m = newModel.(model)

	if m.cursor != 1 {
		t.Errorf("expected cursor at 1 after down, got %d", m.cursor)
	}

	// move down again
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'j'}})
	m = newModel.(model)

	if m.cursor != 2 {
		t.Errorf("expected cursor at 2 after second down, got %d", m.cursor)
	}

	// move up with 'k'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'k'}})
	m = newModel.(model)

	if m.cursor != 1 {
		t.Errorf("expected cursor at 1 after up, got %d", m.cursor)
	}

	// go to top with 'g'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'g'}})
	m = newModel.(model)

	if m.cursor != 0 {
		t.Errorf("expected cursor at 0 after 'g', got %d", m.cursor)
	}

	// go to bottom with 'G'
	newModel, _ = m.Update(tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune{'G'}})
	m = newModel.(model)

	if m.cursor != 2 {
		t.Errorf("expected cursor at 2 after 'G', got %d", m.cursor)
	}
}

func TestTUI_WindowResize(t *testing.T) {
	m := New(Options{Theme: "dark", Interval: time.Hour})

	newModel, _ := m.Update(tea.WindowSizeMsg{Width: 120, Height: 40})
	m = newModel.(model)

	if m.width != 120 {
		t.Errorf("expected width 120, got %d", m.width)
	}
	if m.height != 40 {
		t.Errorf("expected height 40, got %d", m.height)
	}
}

func TestTUI_ViewRenders(t *testing.T) {
	m := New(Options{Theme: "dark", Interval: time.Hour})
	m.width = 120
	m.height = 40

	m.connections = []collector.Connection{
		{PID: 1234, Process: "nginx", Proto: "tcp", State: "LISTEN", Laddr: "0.0.0.0", Lport: 80},
	}

	// main view should render without panic
	view := m.View()
	if view == "" {
		t.Error("expected non-empty view")
	}

	// help view
	m.showHelp = true
	helpView := m.View()
	if helpView == "" {
		t.Error("expected non-empty help view")
	}
}