package handlers_test

import (
	"slices"
	"testing"

	"github.com/StevanFreeborn/term-tier/internal/core"
	"github.com/StevanFreeborn/term-tier/internal/handlers"
	"github.com/StevanFreeborn/term-tier/internal/state"
	tea "github.com/charmbracelet/bubbletea"
)

func TestNewUpdateItemHandler(t *testing.T) {
	h := handlers.NewUpdateItemHandler()

	if h.Description() != "Update item" {
		t.Errorf("Expected description 'Update item', got %q", h.Description())
	}

	keys := h.KeysHandled()

	if !slices.Contains(keys, "r") {
		t.Errorf("Expected keys ['r'], got %v", keys)
	}
}

func TestUpdateItemHandler_Match(t *testing.T) {
	h := handlers.NewUpdateItemHandler()

	tests := []struct {
		name     string
		mode     state.Mode
		key      string
		expected bool
	}{
		{
			name:     "Matches 'r' in Navigation Mode",
			mode:     state.NavigationMode,
			key:      "r",
			expected: true,
		},
		{
			name:     "Ignores 'r' in Input Mode",
			mode:     state.InputMode,
			key:      "r",
			expected: false,
		},
		{
			name:     "Ignores other keys",
			mode:     state.NavigationMode,
			key:      "a",
			expected: false,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			s := state.New(state.WithMode(tt.mode))
			msg := tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune(tt.key)}

			if got := h.Match(s, msg); got != tt.expected {
				t.Errorf("Match() = %v, want %v", got, tt.expected)
			}
		})
	}
}

func TestUpdateItemHandler_Handle(t *testing.T) {
	h := handlers.NewUpdateItemHandler()

	tiers := []core.Tier{{Name: "S", Items: []core.Item{"EditMe"}}}

	s := state.New(
		state.WithTiers(tiers),
		state.WithCursor(0, 0),
		state.WithMode(state.NavigationMode),
	)

	msg := tea.KeyMsg{Type: tea.KeyRunes, Runes: []rune("r")}
	cmd := h.Handle(s, msg)

	if s.Mode() != state.InputMode {
		t.Errorf("Expected state to switch to InputMode, got %v", s.Mode())
	}

	if s.Input().Value() != "EditMe" {
		t.Errorf("Expected input to be pre-filled with 'EditMe', got %q", s.Input().Value())
	}

	if cmd == nil {
		t.Error("Expected Handle to return a command, got nil")
	}
}