/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013-2015 Damien P. George
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "modmachine.h"

#include <stdio.h>
#include <string.h>

#include "extmod/machine_i2c.h"
#include "extmod/machine_mem.h"
#include "extmod/machine_pulse.h"
#include "extmod/machine_signal.h"
#include "extmod/machine_spi.h"
#include "extmod/vfs.h"
#include "gccollect.h"
#include "shared/runtime/pyexec.h"
#include "py/gc.h"
#include "py/mperrno.h"
#include "py/mphal.h"
#include "py/objstr.h"
#include "py/runtime.h"
// #include "irq.h"
// #include "rng.h"
// #include "pin.h"
// #include "timer.h"
// #include "usb.h"
// #include "rtc.h"
// #include "i2c.h"
// #include "spi.h"
// #include "uart.h"
// #include "wdt.h"
#include <aos/kernel.h>

#if MICROPY_PY_MACHINE

#define HAAS_RESET_SOFT      (0)
#define HAAS_RESET_POWER_ON  (1)
#define HAAS_RESET_HARD      (2)
#define HAAS_RESET_WDT       (3)
#define HAAS_RESET_DEEPSLEEP (4)

STATIC mp_uint_t reset_cause;

void machine_init(void)
{
}

void machine_deinit(void)
{
    // we are doing a soft-reset so change the reset_cause
    reset_cause = HAAS_RESET_SOFT;
}

// machine.info([dump_alloc_table])
// Print out lots of information about the board.
STATIC mp_obj_t machine_info(size_t n_args, const mp_obj_t *args)
{
    // qstr info
    {
        size_t n_pool, n_qstr, n_str_data_bytes, n_total_bytes;
        qstr_pool_info(&n_pool, &n_qstr, &n_str_data_bytes, &n_total_bytes);
        printf(
            "qstr:\n  n_pool=%u\n  n_qstr=%u\n  n_str_data_bytes=%u\n  "
            "n_total_bytes=%u\n",
            n_pool, n_qstr, n_str_data_bytes, n_total_bytes);
    }

    // GC info
    {
        gc_info_t info;
        gc_info(&info);
        printf("GC:\n");
        printf("  %u total\n", info.total);
        printf("  %u : %u\n", info.used, info.free);
        printf("  1=%u 2=%u m=%u\n", info.num_1block, info.num_2block,
               info.max_block);
    }

    // free space on flash
    {
#if MICROPY_VFS_FAT
        for (mp_vfs_mount_t *vfs = MP_STATE_VM(vfs_mount_table); vfs != NULL;
             vfs = vfs->next) {
            if (strncmp("/flash", vfs->str, vfs->len) == 0) {
                // assumes that it's a FatFs filesystem
                fs_user_mount_t *vfs_fat = MP_OBJ_TO_PTR(vfs->obj);
                DWORD nclst;
                f_getfree(&vfs_fat->fatfs, &nclst);
                printf("LFS free: %u bytes\n",
                       (uint)(nclst * vfs_fat->fatfs.csize * 512));
                break;
            }
        }
#endif
    }

    if (n_args == 1) {
        // arg given means dump gc allocation table
        gc_dump_alloc_table();
    }

    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_info_obj, 0, 1, machine_info);

// Returns a string of 12 bytes (96 bits), which is the unique ID for the MCU.
STATIC mp_obj_t machine_unique_id(void)
{
    byte *id = (byte *)(0x1ffff7ac);
    return mp_obj_new_bytes(id, 12);
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);

// Resets the pyboard in a manner similar to pushing the external RESET button.
STATIC mp_obj_t machine_reset(void)
{
    aos_reboot();
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);

STATIC mp_obj_t machine_soft_reset(void)
{
    pyexec_system_exit = PYEXEC_FORCED_EXIT;
    mp_raise_type(&mp_type_SystemExit);
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_soft_reset_obj, machine_soft_reset);

// Activate the bootloader without BOOT* pins.
STATIC NORETURN mp_obj_t machine_bootloader(size_t n_args, const mp_obj_t *args)
{
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_bootloader_obj, 0, 1,
                                    machine_bootloader);

// get or set the MCU frequencies
STATIC mp_obj_t machine_freq(size_t n_args, const mp_obj_t *args)
{
    if (n_args == 0) {
        // get
        mp_obj_t tuple[] = {
            mp_obj_new_int(/*HAL_RCC_GetSysClockFreq()*/ 0),
            mp_obj_new_int(/*HAL_RCC_GetHCLKFreq()*/ 0),
            mp_obj_new_int(/*HAL_RCC_GetPCLK1Freq()*/ 0),
        };
        return mp_obj_new_tuple(MP_ARRAY_SIZE(tuple), tuple);
    } else {
        // set
        mp_int_t sysclk = mp_obj_get_int(args[0]);
        mp_int_t ahb = sysclk;
        mp_int_t apb1 = ahb / 4;
        mp_int_t apb2 = ahb / 2;
        if (n_args > 1) {
            ahb = mp_obj_get_int(args[1]);
            if (n_args > 2) {
                apb1 = mp_obj_get_int(args[2]);
                if (n_args > 3) {
                    apb2 = mp_obj_get_int(args[3]);
                }
            }
        }
        int ret = 0;
        if (ret == -MP_EINVAL) {
            mp_raise_ValueError(MP_ERROR_TEXT("invalid freq"));
        } else if (ret < 0) {
            void NORETURN __fatal_error(const char *msg);
            __fatal_error("can't change freq");
        }
        return mp_const_none;
    }
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_freq_obj, 0, 4, machine_freq);

// idle()
// This executies a wfi machine instruction which reduces power consumption
// of the MCU until an interrupt occurs, at which point execution continues.
STATIC mp_obj_t machine_idle(void)
{
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_idle_obj, machine_idle);

STATIC mp_obj_t machine_lightsleep(size_t n_args, const mp_obj_t *args)
{
    if (n_args != 0) {
        mp_obj_t args2[2] = { MP_OBJ_NULL, args[0] };
    }
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_lightsleep_obj, 0, 1,
                                    machine_lightsleep);

STATIC mp_obj_t machine_deepsleep(size_t n_args, const mp_obj_t *args)
{
    if (n_args != 0) {
        mp_obj_t args2[2] = { MP_OBJ_NULL, args[0] };
    }
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(machine_deepsleep_obj, 0, 1,
                                    machine_deepsleep);

STATIC mp_obj_t machine_reset_cause(void)
{
    return MP_OBJ_NEW_SMALL_INT(reset_cause);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_cause_obj, machine_reset_cause);

// Return a 30-bit hardware generated random number.
STATIC mp_obj_t machine_rng(void)
{
    return mp_obj_new_int(aos_rand());
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_rng_obj, machine_rng);

STATIC mp_obj_t machine_disable_irq(void)
{
    mp_uint_t state = MICROPY_BEGIN_ATOMIC_SECTION();
    return mp_obj_new_int(state);
}
MP_DEFINE_CONST_FUN_OBJ_0(machine_disable_irq_obj, machine_disable_irq);

STATIC mp_obj_t machine_enable_irq(mp_obj_t state_in)
{
    mp_uint_t state = mp_obj_get_int(state_in);
    MICROPY_END_ATOMIC_SECTION(state);
    return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(machine_enable_irq_obj, machine_enable_irq);

STATIC mp_obj_t machine_wake_reason(size_t n_args, const mp_obj_t *pos_args,
                                    mp_map_t *kw_args)
{
    return MP_OBJ_NEW_SMALL_INT(0);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_wake_reason_obj, 0,
                                  machine_wake_reason);

STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_machine) },
    { MP_ROM_QSTR(MP_QSTR_info), MP_ROM_PTR(&machine_info_obj) },
    { MP_ROM_QSTR(MP_QSTR_unique_id), MP_ROM_PTR(&machine_unique_id_obj) },
    { MP_ROM_QSTR(MP_QSTR_freq), MP_ROM_PTR(&machine_freq_obj) },
    { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&machine_reset_obj) },
    { MP_ROM_QSTR(MP_QSTR_soft_reset), MP_ROM_PTR(&machine_soft_reset_obj) },
    { MP_ROM_QSTR(MP_QSTR_bootloader), MP_ROM_PTR(&machine_bootloader_obj) },
    { MP_ROM_QSTR(MP_QSTR_rng), MP_ROM_PTR(&machine_rng_obj) },

    { MP_ROM_QSTR(MP_QSTR_mem8), MP_ROM_PTR(&machine_mem8_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem16), MP_ROM_PTR(&machine_mem16_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem32), MP_ROM_PTR(&machine_mem32_obj) },

    { MP_ROM_QSTR(MP_QSTR_idle), MP_ROM_PTR(&machine_idle_obj) },
    { MP_ROM_QSTR(MP_QSTR_sleep), MP_ROM_PTR(&machine_lightsleep_obj) },
    { MP_ROM_QSTR(MP_QSTR_lightsleep), MP_ROM_PTR(&machine_lightsleep_obj) },
    { MP_ROM_QSTR(MP_QSTR_deepsleep), MP_ROM_PTR(&machine_deepsleep_obj) },
    { MP_ROM_QSTR(MP_QSTR_time_pulse_us),
      MP_ROM_PTR(&machine_time_pulse_us_obj) },

    { MP_ROM_QSTR(MP_QSTR_disable_irq), MP_ROM_PTR(&machine_disable_irq_obj) },
    { MP_ROM_QSTR(MP_QSTR_enable_irq), MP_ROM_PTR(&machine_enable_irq_obj) },

    // wake abilities
    { MP_ROM_QSTR(MP_QSTR_SLEEP), MP_ROM_INT(MACHINE_WAKE_SLEEP) },
    { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(MACHINE_WAKE_DEEPSLEEP) },
    { MP_ROM_QSTR(MP_QSTR_Pin), MP_ROM_PTR(&machine_pin_type) },
    { MP_ROM_QSTR(MP_QSTR_Signal), MP_ROM_PTR(&machine_signal_type) },

    { MP_ROM_QSTR(MP_QSTR_ADC), MP_ROM_PTR(&machine_adc_type) },
#if MICROPY_PY_MACHINE_DAC
    { MP_ROM_QSTR(MP_QSTR_DAC), MP_ROM_PTR(&machine_dac_type) },
#endif
    { MP_ROM_QSTR(MP_QSTR_I2C), MP_ROM_PTR(&machine_hw_i2c_type) },
    { MP_ROM_QSTR(MP_QSTR_SoftI2C), MP_ROM_PTR(&mp_machine_soft_i2c_type) },
    { MP_ROM_QSTR(MP_QSTR_PWM), MP_ROM_PTR(&machine_pwm_type) },
    { MP_ROM_QSTR(MP_QSTR_RTC), MP_ROM_PTR(&machine_rtc_type) },
    { MP_ROM_QSTR(MP_QSTR_SPI), MP_ROM_PTR(&machine_hw_spi_type) },
    { MP_ROM_QSTR(MP_QSTR_SoftSPI), MP_ROM_PTR(&mp_machine_soft_spi_type) },
    { MP_ROM_QSTR(MP_QSTR_UART), MP_ROM_PTR(&machine_uart_type) },
    { MP_ROM_QSTR(MP_QSTR_Timer), MP_ROM_PTR(&machine_timer_type) },
    { MP_ROM_QSTR(MP_QSTR_SoftTimer), MP_ROM_PTR(&mp_machine_soft_timer_type) },
    { MP_ROM_QSTR(MP_QSTR_WDT), MP_ROM_PTR(&machine_wdt_type) },
    // { MP_ROM_QSTR(MP_QSTR_SDCard), MP_ROM_PTR(&machine_sdcard_type) },

    // Reset reasons
    { MP_ROM_QSTR(MP_QSTR_reset_cause), MP_ROM_PTR(&machine_reset_cause_obj) },
    { MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(MP_HARD_RESET) },
    { MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(MP_PWRON_RESET) },
    { MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(MP_WDT_RESET) },
    { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(MP_DEEPSLEEP_RESET) },
    { MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(MP_SOFT_RESET) },

    // Wake reasons
    { MP_ROM_QSTR(MP_QSTR_wake_reason), MP_ROM_PTR(&machine_wake_reason_obj) },
    { MP_ROM_QSTR(MP_QSTR_PIN_WAKE), MP_ROM_INT(SLEEP_WAKEUP_EXT0) },
    { MP_ROM_QSTR(MP_QSTR_EXT0_WAKE), MP_ROM_INT(SLEEP_WAKEUP_EXT0) },
    { MP_ROM_QSTR(MP_QSTR_EXT1_WAKE), MP_ROM_INT(SLEEP_WAKEUP_EXT1) },
    { MP_ROM_QSTR(MP_QSTR_TIMER_WAKE), MP_ROM_INT(SLEEP_WAKEUP_TIMER) },
    { MP_ROM_QSTR(MP_QSTR_TOUCHPAD_WAKE), MP_ROM_INT(SLEEP_WAKEUP_TOUCHPAD) },
    { MP_ROM_QSTR(MP_QSTR_ULP_WAKE), MP_ROM_INT(SLEEP_WAKEUP_ULP) },

    // class constants
    { MP_ROM_QSTR(MP_QSTR_IDLE), MP_ROM_INT(PWR_MODE_ACTIVE) },
    { MP_ROM_QSTR(MP_QSTR_SLEEP), MP_ROM_INT(PWR_MODE_LPDS) },
    { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP), MP_ROM_INT(PWR_MODE_HIBERNATE) },
    { MP_ROM_QSTR(MP_QSTR_POWER_ON),
      MP_ROM_INT(SLP_PWRON_RESET) },  // legacy constant
    { MP_ROM_QSTR(MP_QSTR_PWRON_RESET), MP_ROM_INT(SLP_PWRON_RESET) },
    { MP_ROM_QSTR(MP_QSTR_HARD_RESET), MP_ROM_INT(SLP_HARD_RESET) },
    { MP_ROM_QSTR(MP_QSTR_WDT_RESET), MP_ROM_INT(SLP_WDT_RESET) },
    { MP_ROM_QSTR(MP_QSTR_DEEPSLEEP_RESET), MP_ROM_INT(SLP_HIB_RESET) },
    { MP_ROM_QSTR(MP_QSTR_SOFT_RESET), MP_ROM_INT(SLP_SOFT_RESET) },
    { MP_ROM_QSTR(MP_QSTR_WLAN_WAKE), MP_ROM_INT(SLP_WAKED_BY_WLAN) },
    { MP_ROM_QSTR(MP_QSTR_PIN_WAKE), MP_ROM_INT(SLP_WAKED_BY_GPIO) },
    { MP_ROM_QSTR(MP_QSTR_RTC_WAKE), MP_ROM_INT(SLP_WAKED_BY_RTC) },
};

STATIC MP_DEFINE_CONST_DICT(machine_module_globals,
                            machine_module_globals_table);

const mp_obj_module_t mp_module_machine = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t *)&machine_module_globals,
};

MP_REGISTER_MODULE(MP_QSTR_machine, mp_module_machine, MICROPY_PY_MACHINE);

#endif