//go:build integration

package ingredient_test

import (
	"context"
	"testing"

	"github.com/food-ai/backend/internal/ingredient"
	"github.com/food-ai/backend/internal/infra/locale"
	"github.com/food-ai/backend/internal/testutil"
)

func TestIngredientRepository_Upsert_Insert(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "produce"
	unit := "g"
	cal := 52.0

	mapping := &ingredient.IngredientMapping{
		CanonicalName:   "apple",
		Category:        &cat,
		DefaultUnit:     &unit,
		CaloriesPer100g: &cal,
	}

	got, upsertError := repo.Upsert(ctx, mapping)
	if upsertError != nil {
		t.Fatalf("upsert: %v", upsertError)
	}
	if got.ID == "" {
		t.Error("expected non-empty ID")
	}
	if got.CanonicalName != "apple" {
		t.Errorf("canonical_name: want apple, got %s", got.CanonicalName)
	}
	if *got.CaloriesPer100g != 52.0 {
		t.Errorf("calories: want 52.0, got %v", got.CaloriesPer100g)
	}
}

func TestIngredientRepository_Upsert_ConflictUpdates(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "produce"
	unit := "g"

	first := &ingredient.IngredientMapping{
		CanonicalName: "banana",
		Category:      &cat,
		DefaultUnit:   &unit,
	}
	got1, firstUpsertError := repo.Upsert(ctx, first)
	if firstUpsertError != nil {
		t.Fatalf("first upsert: %v", firstUpsertError)
	}

	cal := 89.0
	second := &ingredient.IngredientMapping{
		CanonicalName:   "banana",
		Category:        &cat,
		DefaultUnit:     &unit,
		CaloriesPer100g: &cal,
	}
	got2, secondUpsertError := repo.Upsert(ctx, second)
	if secondUpsertError != nil {
		t.Fatalf("second upsert: %v", secondUpsertError)
	}

	if got1.ID != got2.ID {
		t.Errorf("ID changed on conflict update: %s != %s", got1.ID, got2.ID)
	}
	if got2.CanonicalName != "banana" {
		t.Errorf("canonical_name not updated: got %s", got2.CanonicalName)
	}
	if got2.CaloriesPer100g == nil || *got2.CaloriesPer100g != 89.0 {
		t.Errorf("calories not updated: got %v", got2.CaloriesPer100g)
	}
}

func TestIngredientRepository_GetByID_Found(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "dairy"
	unit := "g"

	saved, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
		CanonicalName: "cheese",
		Category:      &cat,
		DefaultUnit:   &unit,
	})
	if upsertError != nil {
		t.Fatalf("upsert: %v", upsertError)
	}

	got, getError := repo.GetByID(ctx, saved.ID)
	if getError != nil {
		t.Fatalf("get: %v", getError)
	}
	if got == nil {
		t.Fatal("expected non-nil result")
	}
	if got.CanonicalName != "cheese" {
		t.Errorf("want cheese, got %s", got.CanonicalName)
	}
}

func TestIngredientRepository_GetByID_NotFound(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	got, getError := repo.GetByID(ctx, "00000000-0000-0000-0000-000000000000")
	if getError != nil {
		t.Fatalf("unexpected error: %v", getError)
	}
	if got != nil {
		t.Error("expected nil result for missing ID")
	}
}

func TestIngredientRepository_ListMissingTranslation(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "produce"
	unit := "g"

	// Insert 3 without any translation.
	for _, name := range []string{"carrot", "onion", "garlic"} {
		_, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
			CanonicalName: name,
			Category:      &cat,
			DefaultUnit:   &unit,
		})
		if upsertError != nil {
			t.Fatalf("upsert %s: %v", name, upsertError)
		}
	}

	// Insert 1 and add a translation — should not appear in the result.
	saved, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
		CanonicalName: "tomato",
		Category:      &cat,
		DefaultUnit:   &unit,
	})
	if upsertError != nil {
		t.Fatalf("upsert tomato: %v", upsertError)
	}
	if translationError := repo.UpsertTranslation(ctx, saved.ID, "ru", "помидор"); translationError != nil {
		t.Fatalf("upsert translation: %v", translationError)
	}

	missing, listError := repo.ListMissingTranslation(ctx, "ru", 10, 0)
	if listError != nil {
		t.Fatalf("list missing translation: %v", listError)
	}

	for _, mapping := range missing {
		if mapping.CanonicalName == "tomato" {
			t.Error("translated ingredient should not appear in ListMissingTranslation")
		}
	}
	if len(missing) < 3 {
		t.Errorf("expected at least 3 untranslated, got %d", len(missing))
	}
}

func TestIngredientRepository_UpsertTranslation(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "meat"
	unit := "g"

	saved, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
		CanonicalName: "chicken_breast",
		Category:      &cat,
		DefaultUnit:   &unit,
	})
	if upsertError != nil {
		t.Fatalf("upsert: %v", upsertError)
	}

	if translationError := repo.UpsertTranslation(ctx, saved.ID, "ru", "куриная грудка"); translationError != nil {
		t.Fatalf("upsert translation: %v", translationError)
	}

	// Retrieve with Russian context — CanonicalName should be the Russian name.
	russianContext := locale.WithLang(ctx, "ru")
	got, getError := repo.GetByID(russianContext, saved.ID)
	if getError != nil {
		t.Fatalf("get by id: %v", getError)
	}
	if got.CanonicalName != "куриная грудка" {
		t.Errorf("expected CanonicalName='куриная грудка', got %q", got.CanonicalName)
	}

	// Retrieve with English context (default) — CanonicalName should be the English name.
	englishContext := locale.WithLang(ctx, "en")
	gotEnglish, getEnglishError := repo.GetByID(englishContext, saved.ID)
	if getEnglishError != nil {
		t.Fatalf("get by id (en): %v", getEnglishError)
	}
	if gotEnglish.CanonicalName != "chicken_breast" {
		t.Errorf("expected English CanonicalName='chicken_breast', got %q", gotEnglish.CanonicalName)
	}
}

func TestIngredientRepository_UpsertAliases(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	cat := "produce"
	unit := "g"

	saved, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
		CanonicalName: "apple_test_aliases",
		Category:      &cat,
		DefaultUnit:   &unit,
	})
	if upsertError != nil {
		t.Fatalf("upsert: %v", upsertError)
	}

	aliases := []string{"apple", "apples", "red apple"}
	if aliasError := repo.UpsertAliases(ctx, saved.ID, "en", aliases); aliasError != nil {
		t.Fatalf("upsert aliases: %v", aliasError)
	}

	// Idempotent — second call should not fail.
	if aliasError := repo.UpsertAliases(ctx, saved.ID, "en", aliases); aliasError != nil {
		t.Fatalf("second upsert aliases: %v", aliasError)
	}

	// Retrieve with English context — aliases should appear.
	englishContext := locale.WithLang(ctx, "en")
	got, getError := repo.GetByID(englishContext, saved.ID)
	if getError != nil {
		t.Fatalf("get by id: %v", getError)
	}
	if string(got.Aliases) == "[]" || string(got.Aliases) == "null" {
		t.Errorf("expected non-empty aliases, got %s", got.Aliases)
	}
}

func TestIngredientRepository_UpsertCategoryTranslation(t *testing.T) {
	pool := testutil.SetupTestDB(t)
	repo := ingredient.NewRepository(pool)
	ctx := context.Background()

	// Upsert an ingredient with a known category.
	cat := "dairy"
	unit := "g"
	saved, upsertError := repo.Upsert(ctx, &ingredient.IngredientMapping{
		CanonicalName: "milk_test_category",
		Category:      &cat,
		DefaultUnit:   &unit,
	})
	if upsertError != nil {
		t.Fatalf("upsert: %v", upsertError)
	}

	// The migration already inserted Russian translations for known categories.
	// Retrieve with Russian context — CategoryName should be set.
	russianContext := locale.WithLang(ctx, "ru")
	got, getError := repo.GetByID(russianContext, saved.ID)
	if getError != nil {
		t.Fatalf("get by id: %v", getError)
	}
	if got.CategoryName == nil || *got.CategoryName == "" {
		t.Error("expected non-empty CategoryName for 'dairy' in Russian")
	}

	// Upsert a new translation and verify it is returned.
	if translationError := repo.UpsertCategoryTranslation(ctx, "dairy", "de", "Milchprodukte"); translationError != nil {
		t.Fatalf("upsert category translation: %v", translationError)
	}
	germanContext := locale.WithLang(ctx, "de")
	gotGerman, getGermanError := repo.GetByID(germanContext, saved.ID)
	if getGermanError != nil {
		t.Fatalf("get by id (de): %v", getGermanError)
	}
	if gotGerman.CategoryName == nil || *gotGerman.CategoryName != "Milchprodukte" {
		t.Errorf("expected CategoryName='Milchprodukte', got %v", gotGerman.CategoryName)
	}
}