package templatestrings

import (
	"embed"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

//go:embed testdata/*
var embeddedTestData embed.FS

func TestAll(t *testing.T) {
	t.Run("Faulty initialization", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "en", "faulty")
		require.Error(t, err)
	})
	t.Run("Missing dir", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata/x", ".yaml", "en")
		require.Error(t, err)
	})
	t.Run("Missing file", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "en", "x")
		require.NoError(t, err)
	})
	t.Run("File as directory", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata/en.yaml", ".yaml", "en")
		require.Error(t, err)
	})
	t.Run("Missing default variant", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "x", "en")
		require.Error(t, err)
	})
	t.Run("No variants", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "x")
		require.Error(t, err)
	})
	t.Run("Language twice", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "en", "en", "de")
		require.NoError(t, err)
	})
	t.Run("Empty language", func(t *testing.T) {
		_, err := InitTemplateStrings("testdata", ".yaml", "")
		require.Error(t, err)
	})
	t.Run("Wrong number of inputs", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Empty(t, ts.GetTemplateStringVariant("simple", "en", "x"))
	})
	t.Run("Default variant", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Simple", ts.GetTemplateStringVariant("simple"))
	})
	t.Run("Specified variant", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Simple", ts.GetTemplateStringVariant("en", "simple"))
		assert.Equal(t, "Einfach", ts.GetTemplateStringVariant("de", "simple"))
	})
	t.Run("Fallback to default variant", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Fallback", ts.GetTemplateStringVariant("de", "fallback"))
	})
	t.Run("Missing variant", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Simple", ts.GetTemplateStringVariant("x", "simple"))
	})
	t.Run("Missing string", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Empty(t, ts.GetTemplateStringVariant("x"))
	})
	t.Run("Template func", func(t *testing.T) {
		ts, err := InitTemplateStrings("testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Simple", ts.GetTemplateStringVariantFunc()("simple"))
	})

	// Test using embedded strings
	t.Run("Specified variant", func(t *testing.T) {
		ts, err := InitTemplateStringsFS(embeddedTestData, "testdata", ".yaml", "en", "de")
		require.NoError(t, err)
		assert.Equal(t, "Simple", ts.GetTemplateStringVariant("en", "simple"))
		assert.Equal(t, "Einfach", ts.GetTemplateStringVariant("de", "simple"))
	})
}