package user

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"git.golem15.com/golem15/sm-user-plugin/classes"
	"git.golem15.com/golem15/sm-user-plugin/controllers"
	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/towel"
)

const mailFallbackKey = "golem15.user.mail.fallback_locale"

// TestMailFallbackLocaleConfig reads golem15.user.mail.fallback_locale from
// the plugin's config.yaml default and from overrides.
func TestMailFallbackLocaleConfig(t *testing.T) {
	app := bareApp(t)
	if err := app.Config.MergePlugin("golem15.user", configFS); err != nil {
		t.Fatal(err)
	}
	if v, ok := app.Config.Lookup(mailFallbackKey); !ok || v != "pl" {
		t.Fatalf("config.yaml default = %#v (set %v), want pl", v, ok)
	}
	if got, err := classes.MailFallbackLocale(app); got != "pl" || err != nil {
		t.Fatalf("default: %q %v", got, err)
	}
	for _, tc := range []struct{ value, want string }{{"en", "en"}, {"EN-gb", "en"}} {
		if err := app.Config.Set(mailFallbackKey, tc.value); err != nil {
			t.Fatal(err)
		}
		if got, err := classes.MailFallbackLocale(app); got != tc.want || err != nil {
			t.Errorf("%q: %q %v", tc.value, got, err)
		}
	}
	if err := app.Config.Set(mailFallbackKey, "de"); err != nil {
		t.Fatal(err)
	}
	if _, err := classes.MailFallbackLocale(app); err == nil || !strings.Contains(err.Error(), mailFallbackKey) {
		t.Errorf("de: %v", err)
	}
}

// TestMailFallbackLocaleBoot fails Boot on an unsupported fallback before
// anything is started, and leaves an unset key alone.
func TestMailFallbackLocaleBoot(t *testing.T) {
	withSecret := func(t *testing.T) *backpack.App {
		app := bareApp(t)
		if err := app.Config.Set("golem15.user.jwt.secret", "mail-locale-boot-secret"); err != nil {
			t.Fatal(err)
		}
		return app
	}
	app := withSecret(t)
	if err := app.Config.Set(mailFallbackKey, "de"); err != nil {
		t.Fatal(err)
	}
	if err := (&Plugin{}).Boot(app); err == nil || !strings.Contains(err.Error(), mailFallbackKey) {
		t.Fatalf("Boot with fallback de: %v", err)
	}
	if err := (&Plugin{}).Boot(withSecret(t)); err != nil && strings.Contains(err.Error(), mailFallbackKey) {
		t.Fatalf("Boot with the key unset: %v", err)
	}
}

// TestMailLocaleFromRequest sends the reset mail through POST
// /forgot-password with the request locale the router stores when no
// translate plugin is installed: the raw Accept-Language header.
func TestMailLocaleFromRequest(t *testing.T) {
	if testing.Short() {
		t.Skip("Postgres (testcontainers)")
	}
	app, gdb := sessionApp(t, "0s")
	rec, _ := publishMemoryMail(t, app)

	forgot := func(t *testing.T, email, locale string) {
		t.Helper()
		req := httptest.NewRequest(http.MethodPost, "/_user/api/v1/forgot-password", strings.NewReader(`{"email":"`+email+`"}`))
		req.Host = "example.com"
		req.Header.Set("Content-Type", "application/json")
		if locale != "" {
			req = req.WithContext(towel.WithLocale(req.Context(), locale))
		}
		w := httptest.NewRecorder()
		controllers.ForgotPassword(app)(w, req)
		if w.Code >= 300 {
			t.Fatalf("forgot-password %s: %d %s", email, w.Code, w.Body.String())
		}
	}

	insertUser(t, gdb, "locale-header@example.test", "correct-horse")
	forgot(t, "locale-header@example.test", "en-GB,en;q=0.9")
	assertTemplate(t, rec, "golem15.user::mail.restore-en", "locale-header@example.test")

	insertUser(t, gdb, "locale-none@example.test", "correct-horse")
	forgot(t, "locale-none@example.test", "")
	assertTemplate(t, rec, "golem15.user::mail.restore", "locale-none@example.test")

	if err := app.Config.Set(mailFallbackKey, "en"); err != nil {
		t.Fatal(err)
	}
	insertUser(t, gdb, "locale-fallback@example.test", "correct-horse")
	forgot(t, "locale-fallback@example.test", "")
	assertTemplate(t, rec, "golem15.user::mail.restore-en", "locale-fallback@example.test")

	saved := insertUser(t, gdb, "locale-saved@example.test", "correct-horse")
	if err := gdb.Model(saved).Update("preferred_locale", "en-GB").Error; err != nil {
		t.Fatal(err)
	}
	forgot(t, "locale-saved@example.test", "pl")
	assertTemplate(t, rec, "golem15.user::mail.restore-en", "locale-saved@example.test")
}