package repository_test

import (
	"context"
	"os"
	"testing"

	"osdb/internal/database"
	"osdb/internal/domain"
	"osdb/internal/handler"
	"osdb/internal/repository"
)

// pngFixture is a minimal valid PNG for byte round-trip testing.
var pngFixture = []byte{
	0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a,
	0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52,
	0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
	0x08, 0x02, 0x00, 0x00, 0x00, 0x90, 0x77, 0x53,
	0xde, 0x00, 0x00, 0x00, 0x0c, 0x49, 0x44, 0x41,
	0x54, 0x08, 0xd7, 0x63, 0xf8, 0xcf, 0xc0, 0x00,
	0x00, 0x00, 0x02, 0x00, 0x01, 0xe2, 0x21, 0xbc,
	0x33, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e,
	0x44, 0xae, 0x42, 0x60, 0x82,
}

func TestFruitRepoIntegration(t *testing.T) {
	dsn := os.Getenv("DATABASE_URL")
	if dsn == "" {
		t.Skip("DATABASE_URL not set — skipping integration test")
	}

	ctx := context.Background()
	pool, err := database.Connect(ctx, dsn)
	if err != nil {
		t.Fatalf("connect: %v", err)
	}
	defer pool.Close()

	repo := repository.NewFruitRepo(pool)

	// cleanup after test
	t.Cleanup(func() {
		pool.Exec(ctx, `DELETE FROM fruits WHERE osdb_number LIKE 'TEST-%'`)
	})

	// Create
	dto := domain.FruitWriteDTO{
		Name:       "Boskop",
		OSDBNumber: "TEST-001",
		FruitType:  "Apfelsorten",
		Synonyms:   []string{"Boskop-Renette", "Schöner aus Boskoop"},
	}
	f, err := repo.Create(ctx, dto)
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if f.ID == 0 {
		t.Fatal("want non-zero ID")
	}
	if len(f.Synonyms) != 2 {
		t.Fatalf("want 2 synonyms got %d", len(f.Synonyms))
	}

	// Duplicate osdb_number → ErrDuplicateOSDBNumber
	_, err = repo.Create(ctx, dto)
	if err != handler.ErrDuplicateOSDBNumber {
		t.Fatalf("want ErrDuplicateOSDBNumber got %v", err)
	}

	// Get (synonyms present)
	got, err := repo.Get(ctx, f.ID)
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	if len(got.Synonyms) != 2 {
		t.Fatalf("want 2 synonyms got %d", len(got.Synonyms))
	}

	// Update (replaces synonyms wholesale)
	updated, err := repo.Update(ctx, f.ID, domain.FruitWriteDTO{
		Name:       "Boskop Updated",
		OSDBNumber: "TEST-001",
		FruitType:  "Apfelsorten",
		Synonyms:   []string{"Renamed"},
	})
	if err != nil {
		t.Fatalf("Update: %v", err)
	}
	if updated.Name != "Boskop Updated" {
		t.Fatalf("want updated name got %s", updated.Name)
	}
	if len(updated.Synonyms) != 1 || updated.Synonyms[0] != "Renamed" {
		t.Fatalf("want [Renamed] got %v", updated.Synonyms)
	}

	// List
	fruits, total, err := repo.List(ctx, 50, 0)
	if err != nil {
		t.Fatalf("List: %v", err)
	}
	if total < 1 {
		t.Fatalf("want total >= 1 got %d", total)
	}
	_ = fruits

	// AddImage + GetImageData byte round-trip
	filename := "test.png"
	imageType := "fruit"
	img, err := repo.AddImage(ctx, f.ID, &filename, pngFixture, imageType, nil)
	if err != nil {
		t.Fatalf("AddImage: %v", err)
	}
	if img.ID == 0 {
		t.Fatal("want non-zero image ID")
	}

	data, err := repo.GetImageData(ctx, f.ID, img.ID)
	if err != nil {
		t.Fatalf("GetImageData: %v", err)
	}
	if len(data) != len(pngFixture) {
		t.Fatalf("byte round-trip: want %d bytes got %d", len(pngFixture), len(data))
	}

	// DeleteImage
	if err := repo.DeleteImage(ctx, f.ID, img.ID); err != nil {
		t.Fatalf("DeleteImage: %v", err)
	}
	if _, err := repo.GetImageData(ctx, f.ID, img.ID); err != handler.ErrNotFound {
		t.Fatalf("after delete: want ErrNotFound got %v", err)
	}

	// Delete (cascade check)
	if err := repo.Delete(ctx, f.ID); err != nil {
		t.Fatalf("Delete: %v", err)
	}
	if _, err := repo.Get(ctx, f.ID); err != handler.ErrNotFound {
		t.Fatalf("after delete: want ErrNotFound got %v", err)
	}

	// Update non-existent → ErrNotFound
	if _, err := repo.Update(ctx, 999999, dto); err != handler.ErrNotFound {
		t.Fatalf("Update non-existent: want ErrNotFound got %v", err)
	}
}