package auth

import (
	"context"
	"errors"
	"testing"

	"github.com/Silo-Server/silo-server/internal/models"
	"github.com/Silo-Server/silo-server/internal/userstore"
)

type stubAccountUsers struct {
	createFn func(context.Context, models.CreateUserInput) (*models.User, error)
	deleteFn func(context.Context, int) error
}

func (s stubAccountUsers) Create(ctx context.Context, input models.CreateUserInput) (*models.User, error) {
	return s.createFn(ctx, input)
}

func (s stubAccountUsers) Delete(ctx context.Context, id int) error {
	if s.deleteFn == nil {
		return nil
	}
	return s.deleteFn(ctx, id)
}

type stubStoreProvider struct {
	store userstore.UserStore
	err   error
}

func (s stubStoreProvider) ForUser(context.Context, int) (userstore.UserStore, error) {
	if s.err != nil {
		return nil, s.err
	}
	return s.store, nil
}

func (s stubStoreProvider) Close() error { return nil }

type stubUserStore struct {
	userstore.UserStore
	createProfileFn func(context.Context, userstore.Profile) error
}

func (s stubUserStore) CreateProfile(ctx context.Context, p userstore.Profile) error {
	return s.createProfileFn(ctx, p)
}

func TestAccountProvisionerCreateAccount_SkipsProfileByDefault(t *testing.T) {
	var createCalls int
	provisioner := NewAccountProvisioner(
		stubAccountUsers{
			createFn: func(context.Context, models.CreateUserInput) (*models.User, error) {
				createCalls++
				return &models.User{ID: 42, Username: "alex"}, nil
			},
		},
		nil,
	)

	user, err := provisioner.CreateAccount(context.Background(), CreateAccountInput{
		User: models.CreateUserInput{Username: "alex"},
	})
	if err != nil {
		t.Fatalf("CreateAccount returned error: %v", err)
	}
	if user == nil || user.ID != 42 {
		t.Fatalf("CreateAccount user = %#v, want ID 42", user)
	}
	if createCalls != 1 {
		t.Fatalf("createCalls = %d, want 1", createCalls)
	}
}

func TestAccountProvisionerCreateAccount_CreatesDefaultProfile(t *testing.T) {
	var createdProfile userstore.Profile
	provisioner := NewAccountProvisioner(
		stubAccountUsers{
			createFn: func(context.Context, models.CreateUserInput) (*models.User, error) {
				return &models.User{ID: 7, Username: "alex"}, nil
			},
		},
		stubStoreProvider{
			store: stubUserStore{
				createProfileFn: func(_ context.Context, p userstore.Profile) error {
					createdProfile = p
					return nil
				},
			},
		},
	)

	_, err := provisioner.CreateAccount(context.Background(), CreateAccountInput{
		User: models.CreateUserInput{Username: "alex"},
		DefaultProfile: DefaultProfileOptions{
			Enabled: true,
		},
	})
	if err != nil {
		t.Fatalf("CreateAccount returned error: %v", err)
	}
	if createdProfile.Name != "alex" {
		t.Fatalf("created profile name = %q, want alex", createdProfile.Name)
	}
	if !createdProfile.ShowForcedSubtitles {
		t.Fatal("created profile should enable forced subtitles by default")
	}
}

func TestAccountProvisionerCreateAccount_UsesExplicitProfileName(t *testing.T) {
	var createdProfile userstore.Profile
	provisioner := NewAccountProvisioner(
		stubAccountUsers{
			createFn: func(context.Context, models.CreateUserInput) (*models.User, error) {
				return &models.User{ID: 7, Username: "alex"}, nil
			},
		},
		stubStoreProvider{
			store: stubUserStore{
				createProfileFn: func(_ context.Context, p userstore.Profile) error {
					createdProfile = p
					return nil
				},
			},
		},
	)

	_, err := provisioner.CreateAccount(context.Background(), CreateAccountInput{
		User: models.CreateUserInput{Username: "alex"},
		DefaultProfile: DefaultProfileOptions{
			Enabled: true,
			Name:    "  Living Room  ",
		},
	})
	if err != nil {
		t.Fatalf("CreateAccount returned error: %v", err)
	}
	if createdProfile.Name != "Living Room" {
		t.Fatalf("created profile name = %q, want Living Room", createdProfile.Name)
	}
}

func TestAccountProvisionerCreateAccount_BlankExplicitProfileNameFallsBackToUsername(t *testing.T) {
	var createdProfile userstore.Profile
	provisioner := NewAccountProvisioner(
		stubAccountUsers{
			createFn: func(context.Context, models.CreateUserInput) (*models.User, error) {
				return &models.User{ID: 7, Username: "alex"}, nil
			},
		},
		stubStoreProvider{
			store: stubUserStore{
				createProfileFn: func(_ context.Context, p userstore.Profile) error {
					createdProfile = p
					return nil
				},
			},
		},
	)

	_, err := provisioner.CreateAccount(context.Background(), CreateAccountInput{
		User: models.CreateUserInput{Username: "alex"},
		DefaultProfile: DefaultProfileOptions{
			Enabled: true,
			Name:    "   ",
		},
	})
	if err != nil {
		t.Fatalf("CreateAccount returned error: %v", err)
	}
	if createdProfile.Name != "alex" {
		t.Fatalf("created profile name = %q, want alex", createdProfile.Name)
	}
}

func TestAccountProvisionerCreateAccount_DeletesUserWhenProfileCreationFails(t *testing.T) {
	var deletedUserID int
	provisioner := NewAccountProvisioner(
		stubAccountUsers{
			createFn: func(context.Context, models.CreateUserInput) (*models.User, error) {
				return &models.User{ID: 9, Username: "alex"}, nil
			},
			deleteFn: func(_ context.Context, id int) error {
				deletedUserID = id
				return nil
			},
		},
		stubStoreProvider{
			store: stubUserStore{
				createProfileFn: func(context.Context, userstore.Profile) error {
					return errors.New("boom")
				},
			},
		},
	)

	_, err := provisioner.CreateAccount(context.Background(), CreateAccountInput{
		User: models.CreateUserInput{Username: "alex"},
		DefaultProfile: DefaultProfileOptions{
			Enabled: true,
		},
	})
	if err == nil {
		t.Fatal("CreateAccount returned nil error, want failure")
	}
	if deletedUserID != 9 {
		t.Fatalf("deletedUserID = %d, want 9", deletedUserID)
	}
}