package assets

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

	"git.westgate.pw/ShadowsOverWestgate/sow-tools/internal/assets/mdl"
)

func TestFixMDL(t *testing.T) {
	dir := t.TempDir()
	// Uppercase name + internal mismatch.
	upper := filepath.Join(dir, "Foo.MDL")
	body := "newmodel wrong\nbeginmodelgeom wrong\nendmodelgeom wrong\ndonemodel wrong\n"
	if err := os.WriteFile(upper, []byte(body), 0o644); err != nil {
		t.Fatal(err)
	}

	// dry-run: nothing changes on disk.
	var out, errw bytes.Buffer
	if code := runFixMDL([]string{"--dry-run", dir}, &out, &errw); code != exitOK {
		t.Fatalf("dry-run exit = %d\n%s", code, errw.String())
	}
	if _, err := os.Stat(upper); err != nil {
		t.Fatal("dry-run renamed a file")
	}

	// real run: file is lowercased and its identity rewritten to match.
	out.Reset()
	errw.Reset()
	if code := runFixMDL([]string{dir}, &out, &errw); code != exitOK {
		t.Fatalf("fix exit = %d\n%s", code, errw.String())
	}
	lowered := filepath.Join(dir, "foo.mdl")
	if _, err := os.Stat(lowered); err != nil {
		t.Fatalf("file was not lowercased: %v", err)
	}
	mismatches, err := mdl.CheckNames(lowered)
	if err != nil {
		t.Fatal(err)
	}
	if len(mismatches) != 0 {
		data, _ := os.ReadFile(lowered)
		t.Fatalf("model still has mismatches after fix: %+v\n%s", mismatches, data)
	}
}