/*
 * FpDevice - A fingerprint reader device
 * Copyright (C) 2019 Benjamin Berg <bberg@redhat.com>
 * Copyright (C) 2019 Marco Trevisan <marco.trevisan@canonical.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#pragma once

#include "fpi-device.h"

/* Chosen so that if we turn on after WARM -> COLD, it takes exactly one time
 * constant to go from COLD -> HOT.
 *   TEMP_COLD_THRESH = 1 / (e + 1)
 */
#define TEMP_COLD_THRESH (0.26894142136999512075)
#define TEMP_WARM_HOT_THRESH (1.0 - TEMP_COLD_THRESH)
#define TEMP_HOT_WARM_THRESH (0.5)

/* Delay updates by 100ms to avoid hitting the border exactly */
#define TEMP_DELAY_SECONDS 0.1

/* Hopefully 3min is long enough to not get in the way, while also not
 * properly overheating any devices.
 */
#define DEFAULT_TEMP_HOT_SECONDS (3 * 60)
#define DEFAULT_TEMP_COLD_SECONDS (9 * 60)

typedef struct
{
  FpDeviceType type;

  GUsbDevice  *usb_device;
  const gchar *virtual_env;
  struct
  {
    gchar *spidev_path;
    gchar *hidraw_path;
  } udev_data;

  gboolean        is_removed;
  gboolean        is_open;
  gboolean        is_suspended;

  gchar          *device_id;
  gchar          *device_name;
  FpScanType      scan_type;
  FpDeviceFeature features;

  guint64         driver_data;

  gint            nr_enroll_stages;
  GSList         *sources;

  /* We always make sure that only one task is run at a time. */
  FpiDeviceAction     current_action;
  GTask              *current_task;
  GError             *current_cancellation_reason;
  GAsyncReadyCallback current_user_cb;
  GCancellable       *current_cancellable;
  gulong              current_cancellable_id;
  gulong              current_task_cancellable_id;
  GSource            *current_idle_cancel_source;
  GSource            *current_task_idle_return_source;

  /* State for tasks */
  gboolean            wait_for_finger;
  FpFingerStatusFlags finger_status;

  /* Driver critical sections */
  guint    critical_section;
  GSource *critical_section_flush_source;
  gboolean cancel_queued;
  gboolean suspend_queued;
  gboolean resume_queued;

  /* Suspend/resume tasks */
  GTask  *suspend_resume_task;
  GError *suspend_error;

  /* Device temperature model information and state */
  GSource      *temp_timeout;
  FpTemperature temp_current;
  gint32        temp_hot_seconds;
  gint32        temp_cold_seconds;
  gint64        temp_last_update;
  gboolean      temp_last_active;
  gdouble       temp_current_ratio;
} FpDevicePrivate;


typedef struct
{
  FpPrint         *print;

  FpEnrollProgress enroll_progress_cb;
  gpointer         enroll_progress_data;
  GDestroyNotify   enroll_progress_destroy;
} FpEnrollData;

void enroll_data_free (FpEnrollData *enroll_data);

typedef struct
{
  FpPrint       *enrolled_print;   /* verify */
  GPtrArray     *gallery;   /* identify */

  gboolean       result_reported;
  FpPrint       *match;
  FpPrint       *print;
  GError        *error;

  FpMatchCb      match_cb;
  gpointer       match_data;
  GDestroyNotify match_destroy;
} FpMatchData;

void match_data_free (FpMatchData *match_data);

void fpi_device_configure_wakeup (FpDevice *device,
                                  gboolean  enabled);
void fpi_device_update_temp (FpDevice *device,
                             gboolean  is_active);