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 TestNewDeleteItemHandler(t *testing.T) {
	h := handlers.NewDeleteItemHandler()

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

	keys := h.KeysHandled()

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

func TestDeleteItemHandler_Match(t *testing.T) {
	h := handlers.NewDeleteItemHandler()

	tests := []struct {
		name     string
		mode     state.Mode
		key      string
		expected bool
	}{
		{
			name:     "Matches 'd' in Navigation Mode",
			mode:     state.NavigationMode,
			key:      "d",
			expected: true,
		},
		{
			name:     "Matches 'backspace' in Navigation Mode",
			mode:     state.NavigationMode,
			key:      "backspace",
			expected: true,
		},
		{
			name:     "Ignores 'd' in Input Mode",
			mode:     state.InputMode,
			key:      "d",
			expected: false,
		},
		{
			name:     "Ignores other keys in Navigation Mode",
			mode:     state.NavigationMode,
			key:      "x",
			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 tt.key == "backspace" {
				msg = tea.KeyMsg{Type: tea.KeyBackspace}
			}

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

func TestDeleteItemHandler_Handle(t *testing.T) {
	h := handlers.NewDeleteItemHandler()

	tiers := make([]core.Tier, 6)
	tiers[0] = core.Tier{Name: "S", Items: []core.Item{"Delete Me"}}

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

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

	if len(s.Tiers()[0].Items) != 0 {
		t.Errorf("Expected item to be deleted, but %d items remain", len(s.Tiers()[0].Items))
	}

	if s.StatusMsg() != "Item Deleted" {
		t.Errorf("Expected status 'Item Deleted', got %q", s.StatusMsg())
	}
}