package phrasebook

import (
	"io/fs"
	"strings"
	"testing"
	"testing/fstest"

	"git.golem15.com/golem15/summercms/backpack"
	"git.golem15.com/golem15/summercms/compass"
)

func TestTranslationSmoke(t *testing.T) {
	t.Parallel()

	fsys := fstest.MapFS{
		"lang/en/lang.yaml": {Data: []byte("greeting: Hello\nlabels:\n  pluginName: Hello plugin\n")},
		"lang/pl/lang.yaml": {Data: []byte("greeting: Cześć\nlabels:\n  pluginName: Wtyczka Hello\n")},
	}
	cat := NewCatalog()
	if err := cat.Load("golem15.hello", fsys); err != nil {
		t.Fatalf("Load: %v", err)
	}
	tr := NewTranslator(cat, Options{})
	if got := tr.GetIn("en", "golem15.hello::lang.labels.pluginName", nil); got != "Hello plugin" {
		t.Fatalf("en nested = %q", got)
	}
	if got := tr.GetIn("pl", "golem15.hello::lang.labels.pluginName", nil); got != "Wtyczka Hello" {
		t.Fatalf("pl nested = %q", got)
	}
	if got := tr.GetIn("en", "golem15.hello::lang.greeting", nil); got != "Hello" {
		t.Fatalf("en greeting = %q", got)
	}
	if got := tr.GetIn("pl", "golem15.hello::lang.greeting", nil); got != "Cześć" {
		t.Fatalf("pl greeting = %q", got)
	}

	t.Run("malformed path", func(t *testing.T) {
		err := NewCatalog().Load("golem15.hello", fstest.MapFS{
			"lang/en.yaml": {Data: []byte("greeting: Hello\n")},
		})
		if err == nil || !strings.Contains(err.Error(), "golem15.hello") || !strings.Contains(err.Error(), "malformed path") {
			t.Fatalf("malformed path error = %v", err)
		}
	})
	t.Run("non-string leaf", func(t *testing.T) {
		err := NewCatalog().Load("golem15.hello", fstest.MapFS{
			"lang/en/lang.yaml": {Data: []byte("count: 1\n")},
		})
		if err == nil || !strings.Contains(err.Error(), "golem15.hello") || !strings.Contains(err.Error(), "lang/en/lang.yaml") || !strings.Contains(err.Error(), "non-string leaf") {
			t.Fatalf("non-string leaf error = %v", err)
		}
	})
	t.Run("duplicate key", func(t *testing.T) {
		err := NewCatalog().Load("golem15.hello", fstest.MapFS{
			"lang/en/lang.yaml": {Data: []byte("labels:\n  name: a\nlabels.name: b\n")},
		})
		if err == nil || !strings.Contains(err.Error(), "golem15.hello") || !strings.Contains(err.Error(), "duplicate key") {
			t.Fatalf("duplicate key error = %v", err)
		}
	})
	t.Run("duplicate namespace owner", func(t *testing.T) {
		cat := NewCatalog()
		fsys := fstest.MapFS{"lang/en/lang.yaml": {Data: []byte("greeting: Hello\n")}}
		if err := cat.Load("golem15.hello", fsys); err != nil {
			t.Fatalf("first Load: %v", err)
		}
		err := cat.Load("golem15.hello", fsys)
		if err == nil || !strings.Contains(err.Error(), "golem15.hello") || !strings.Contains(err.Error(), "duplicate namespace owner") {
			t.Fatalf("duplicate namespace error = %v", err)
		}
	})
	t.Run("activate publishes translator", func(t *testing.T) {
		app := backpack.New(&compass.Config{})
		p := &langPlugin{id: "golem15.hello", fsys: fsys}
		if err := Activate(app, []*langPlugin{p}); err != nil {
			t.Fatalf("Activate: %v", err)
		}
		tr, ok := app.Lookup[*Translator]()
		if !ok {
			t.Fatal("translator not published")
		}
		if got := tr.GetIn("pl", "golem15.hello::lang.greeting", nil); got != "Cześć" {
			t.Fatalf("activated pl = %q", got)
		}
	})
}

type langPlugin struct {
	id   string
	fsys fstest.MapFS
}

func (p *langPlugin) ID() string                   { return p.id }
func (p *langPlugin) Requires() []string           { return nil }
func (p *langPlugin) Register(*backpack.App) error { return nil }
func (p *langPlugin) Boot(*backpack.App) error     { return nil }
func (p *langPlugin) LangFS() fs.FS                { return p.fsys }