package sdl

import (
	"reflect"
	"strings"
	"testing"
)

func TestLibraryCandidatesForOS(t *testing.T) {
	tests := []struct {
		name string
		goos string
		want []string
	}{
		{
			name: "Linux",
			goos: "linux",
			want: []string{"libSDL3.so.0", "libSDL3.so"},
		},
		{
			name: "macOS",
			goos: "darwin",
			want: []string{"libSDL3.0.dylib", "libSDL3.dylib"},
		},
		{
			name: "Windows",
			goos: "windows",
			want: []string{"SDL3.dll"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := libraryCandidatesForOS(tt.goos)
			if err != nil {
				t.Fatalf("libraryCandidatesForOS(%q): %v", tt.goos, err)
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Fatalf("libraryCandidatesForOS(%q) = %v, want %v", tt.goos, got, tt.want)
			}
		})
	}
}

func TestLibraryCandidatesForOSRejectsUnsupportedOS(t *testing.T) {
	got, err := libraryCandidatesForOS("plan9")
	if err == nil {
		t.Fatal("libraryCandidatesForOS(plan9) returned no error")
	}
	if got != nil {
		t.Fatalf("libraryCandidatesForOS(plan9) = %v, want nil", got)
	}
	if !strings.Contains(err.Error(), `"plan9"`) {
		t.Fatalf("error %q does not identify the unsupported OS", err)
	}
}