package tui

import (
	"strings"
	"testing"

	"nub/internal/tool"
	"nub/internal/tool/builtin"
)

func TestRenderToolResult_DiffShowsAddAndRemove(t *testing.T) {
	res := tool.Result{
		ForModel: "1 replacement(s)",
		ForUI: builtin.DiffResult{
			Path: "f.go",
			Lines: []builtin.DiffLine{
				{Op: builtin.DiffRemove, Text: "old line"},
				{Op: builtin.DiffAdd, Text: "new line"},
			},
		},
	}
	out := renderToolResult("edit", res)
	if !strings.Contains(out, "- old line") {
		t.Errorf("missing removed line in: %q", out)
	}
	if !strings.Contains(out, "+ new line") {
		t.Errorf("missing added line in: %q", out)
	}
}

func TestRenderToolResult_ErrorUsesErrorMarker(t *testing.T) {
	out := renderToolResult("bash", tool.Result{ForModel: "boom", IsError: true})
	if !strings.Contains(out, "✗") {
		t.Errorf("expected error marker in: %q", out)
	}
	if strings.Contains(out, "✓") {
		t.Errorf("did not expect success marker in: %q", out)
	}
}

func TestRenderToolResult_OKUsesSuccessMarker(t *testing.T) {
	out := renderToolResult("bash", tool.Result{ForModel: "ok"})
	if !strings.Contains(out, "✓") {
		t.Errorf("expected success marker in: %q", out)
	}
}

func TestWrapForViewport_WrapsLongLinesToWidth(t *testing.T) {
	long := strings.Repeat("word ", 40) // deutlich länger als 20 Spalten
	wrapped := wrapForViewport(long, 20)

	for _, line := range strings.Split(wrapped, "\n") {
		if len([]rune(line)) > 20 {
			t.Errorf("line exceeds width 20 (%d runes): %q", len([]rune(line)), line)
		}
	}
	if wrapped == long {
		t.Error("expected wrapping to actually change the content")
	}
}

func TestWrapForViewport_ZeroWidthIsNoop(t *testing.T) {
	s := "some text that would otherwise wrap"
	if got := wrapForViewport(s, 0); got != s {
		t.Errorf("width<=0 should leave content untouched, got %q", got)
	}
}

func TestRenderToolCall_PrettyPrintsJSONInput(t *testing.T) {
	out := renderToolCall("read", []byte(`{"path":"a.go"}`))
	if !strings.Contains(out, "read") || !strings.Contains(out, "a.go") {
		t.Errorf("unexpected render: %q", out)
	}
}