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package render

import (
	"fmt"
	"strings"
	"testing"

	"github.com/charmbracelet/lipgloss"
	"github.com/muesli/termenv"

	"github.com/humdrum-tiv/dots-cli/internal/api"
	"github.com/humdrum-tiv/dots-cli/internal/day"
)

func TestGridStructure(t *testing.T) {
	rowLabels := []string{"0:00", "4:00", "8:00", "12:00", "16:00", "20:00"}

	for _, blockSize := range []int{15, 30, 60} {
		t.Run(fmt.Sprintf("blockSize=%d", blockSize), func(t *testing.T) {
			d := &api.DayData{
				BlockSize: blockSize,
				Types: []day.ActivityType{
					{ID: "t1", Name: "archer", Color: "#c04000"},
				},
				Blocks:     map[int]string{0: "t1"},
				PlanBlocks: map[int]string{1: "t1"},
			}
			out := Grid(d, 0)

			for _, label := range rowLabels {
				if !strings.Contains(out, label) {
					t.Errorf("blockSize %d: missing row label %q in output:\n%s", blockSize, label, out)
				}
			}
			if !strings.Contains(out, "archer") {
				t.Errorf("blockSize %d: missing legend entry for %q in output:\n%s", blockSize, "archer", out)
			}

			gotRows := strings.Count(strings.TrimRight(out, "\n"), "\n") - 1 // minus blank line before legend
			if gotRows != 6 {
				t.Errorf("blockSize %d: expected 6 rows, got %d", blockSize, gotRows)
			}
		})
	}
}

// TestGridCurrentSlotNoAnsiLeak guards against nested lipgloss.Render calls
// mangling inner ANSI escape sequences (the current-slot underline used to
// re-render an already-styled glyph, corrupting its color code).
func TestGridCurrentSlotNoAnsiLeak(t *testing.T) {
	orig := lipgloss.ColorProfile()
	lipgloss.SetColorProfile(termenv.TrueColor)
	defer lipgloss.SetColorProfile(orig)

	d := &api.DayData{
		BlockSize: 60,
		Types: []day.ActivityType{
			{ID: "t1", Name: "archer", Color: "#008cb3"},
		},
		Blocks: map[int]string{0: "t1"},
	}
	out := Grid(d, 0)

	needle := "[38;2"
	for i := 0; i+len(needle) <= len(out); i++ {
		if out[i:i+len(needle)] == needle {
			if i == 0 || out[i-1] != '\x1b' {
				t.Fatalf("found unescaped %q at byte %d (not preceded by ESC) in output:\n%q", needle, i, out)
			}
		}
	}
}