package service

import (
	"context"
	"errors"
	"testing"

	"gorm.io/driver/sqlite"
	"gorm.io/gorm"

	"github.com/dhao2001/mygo/internal/model"
	"github.com/dhao2001/mygo/internal/repository"
)

func setupAdminService(t *testing.T) (*AdminService, repository.UserRepository) {
	t.Helper()

	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	if err := db.AutoMigrate(&model.User{}); err != nil {
		t.Fatalf("migrate: %v", err)
	}

	userRepo := repository.NewUserRepository(db)
	return NewAdminService(userRepo), userRepo
}

func TestAdminServiceGetUserMissingReturnsNotFound(t *testing.T) {
	svc, _ := setupAdminService(t)

	_, err := svc.GetUser(context.Background(), "missing")
	var ae *model.AppError
	if !errors.As(err, &ae) {
		t.Fatalf("expected AppError, got %T: %v", err, err)
	}
	if ae.Kind != model.KindNotFound {
		t.Fatalf("kind = %q, want %q", ae.Kind, model.KindNotFound)
	}
}

func TestAdminServiceListIncludesDeletedUsers(t *testing.T) {
	svc, repo := setupAdminService(t)
	ctx := context.Background()

	active := &model.User{ID: "active-1", Username: "active", Email: "active@example.com", Status: model.StatusActive}
	deleted := &model.User{ID: "deleted-1", Username: "deleted", Email: "deleted@example.com", Status: model.StatusActive}
	if err := repo.Create(ctx, active); err != nil {
		t.Fatalf("create active: %v", err)
	}
	if err := repo.Create(ctx, deleted); err != nil {
		t.Fatalf("create deleted: %v", err)
	}
	if err := repo.Delete(ctx, deleted.ID); err != nil {
		t.Fatalf("delete user: %v", err)
	}

	users, total, err := svc.ListUsers(ctx, 0, 10)
	if err != nil {
		t.Fatalf("ListUsers = %v", err)
	}
	if total != 2 {
		t.Fatalf("total = %d, want 2", total)
	}
	if len(users) != 2 {
		t.Fatalf("len(users) = %d, want 2", len(users))
	}
}