package skills

import (
	"os"
	"path/filepath"
	"testing"
)

func TestUninstallRejectsUnknownSkillAndPreservesCustomFiles(t *testing.T) {
	dir := t.TempDir()
	custom := filepath.Join(dir, ".cursor", "skills", "user-owned")
	_ = os.MkdirAll(custom, 0700)
	file := filepath.Join(custom, "SKILL.md")
	_ = os.WriteFile(file, []byte("user data"), 0600)
	if err := Uninstall(dir, "user-owned"); err == nil {
		t.Fatal("unknown skill accepted")
	}
	if _, err := os.Stat(file); err != nil {
		t.Fatal("custom skill deleted")
	}
	if err := Install(dir, "fd-engineering"); err != nil {
		t.Fatal(err)
	}
	extra := filepath.Join(skillTargetDir(dir, "fd-engineering"), "my-notes.md")
	_ = os.WriteFile(extra, []byte("notes"), 0600)
	if err := Uninstall(dir, "fd-engineering"); err == nil {
		t.Fatal("custom files silently deleted")
	}
	if _, err := os.Stat(extra); err != nil {
		t.Fatal(err)
	}
}

func TestUninstallPreservesModifiedCommand(t *testing.T) {
	dir := t.TempDir()
	if err := Install(dir, "fd-engineering"); err != nil {
		t.Fatal(err)
	}
	command := filepath.Join(projectCommandsDir(dir), "FD-plan.md")
	if err := os.WriteFile(command, []byte("custom command"), 0600); err != nil {
		t.Fatal(err)
	}
	if err := Uninstall(dir, "fd-engineering"); err != nil {
		t.Fatal(err)
	}
	data, err := os.ReadFile(command)
	if err != nil || string(data) != "custom command" {
		t.Fatal("modified command deleted")
	}
}