package tools

import (
	"strings"
	"testing"

	"mm/internal/fileedit"
)

// TestClip: a display line is scanned, not read. A hundred columns, one line —
// the same rule as the command recap, and the same reason: a multi-line old
// text printed whole would be longer than the diff it announces.
func TestClip(t *testing.T) {
	if got := clip("📝 edit_file: a.go\n  (2 edits)"); got != "📝 edit_file: a.go (2 edits)" {
		t.Errorf("clip folded to %q", got)
	}
	long := clip("📄 read_file: " + strings.Repeat("x", 200))
	if r := []rune(long); len(r) != maxDisplayWidth || r[len(r)-1] != '…' {
		t.Errorf("clip = %d runes ending %q, want %d ending …", len(r), string(r[len(r)-1]), maxDisplayWidth)
	}
}

// TestEditKeyTellsRetriesApart: the loop detector must see a corrected edit as
// a NEW action. Keying on the path alone made "same path, different old text"
// look like a repeat, and the detector fired on a model that was fixing itself.
func TestEditKeyTellsRetriesApart(t *testing.T) {
	a := editKey(editFileInput{Path: "f.go", Edits: []fileedit.Edit{{Old: "x", New: "y"}}})
	b := editKey(editFileInput{Path: "f.go", Edits: []fileedit.Edit{{Old: "x2", New: "y"}}})
	same := editKey(editFileInput{Path: "f.go", Edits: []fileedit.Edit{{Old: "x", New: "y"}}})
	if a == b || a != same {
		t.Errorf("editKey: a=%q b=%q same=%q", a, b, same)
	}
}