class ChangePasswordViewController extends TimeCardsViewController {
    constructor(element) {
        super(element);

        this.successDialog = new Dialog("The password has been successfully updated.", null, Dialog.BUTTONS_OK_ONLY);
        this.onPasswordChangeErrorBound = this.onPasswordChangeError.bind(this);
    }

    viewWillAppear() {
        TimeCards.dataManager.addStoreErrorListener("user", this.onPasswordChangeErrorBound);
        this.reset();
    }

    viewWillDisappear() {
        TimeCards.dataManager.removeStoreErrorListener("user", this.onPasswordChangeErrorBound);
    }

    reset() {
        this.oldPasswordField.value = "";
        this.newPasswordField.value = "";
        this.saveButton.disabled = true;
    }

    onFieldChanged(event) {
        this.saveButton.disabled = !this.changePasswordForm.checkValidity();
    }

    onFormSubmitted(event) {
        event.preventDefault();

        TimeCards.dataManager.store("user", Authentication.currentUser.user_id, {
            old_password: this.oldPasswordField.value,
            password: this.newPasswordField.value
        }, this.onPasswordChanged.bind(this));
    }

    onPasswordChanged(response) {
        this.dismissModally();
        this.successDialog.show();
    }

    onPasswordChangeError(key, entity, error) {
        //Do nothing if key is not current user.
        if (key != Authentication.currentUser.user_id) {
            return;
        }

        //Reset disabled state of save button.
        this.onFieldChanged();
    }
}
UIKit.registerViewControllerType(ChangePasswordViewController);