/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 *
 * Copyright (C) 2006 Alexander Spyridakis, Hristo Kovachev
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/

#include "version.h"
#include "plugin.h"
PLUGIN_HEADER

#define BATTERY_LOG "/battery_bench.txt"
#define BUF_SIZE 16000

#define EV_EXIT 1337

/* seems to work with 1300, but who knows... */ 
#define THREAD_STACK_SIZE DEFAULT_STACK_SIZE + 0x200

#if CONFIG_KEYPAD == RECORDER_PAD

#define BATTERY_ON BUTTON_PLAY
#define BATTERY_OFF BUTTON_OFF
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "OFF"

#if BUTTON_REMOTE != 0
#define BATTERY_RC_ON BUTTON_RC_PLAY
#define BATTERY_RC_OFF BUTTON_RC_STOP
#endif

#elif CONFIG_KEYPAD == ONDIO_PAD

#define BATTERY_ON BUTTON_RIGHT
#define BATTERY_OFF BUTTON_OFF
#define BATTERY_ON_TXT  "RIGHT - start"
#define BATTERY_OFF_TXT "OFF"

#elif CONFIG_KEYPAD == PLAYER_PAD

#define BATTERY_ON BUTTON_PLAY
#define BATTERY_OFF BUTTON_STOP
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "STOP"

#define BATTERY_RC_ON BUTTON_RC_PLAY
#define BATTERY_RC_OFF BUTTON_RC_STOP

#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
      (CONFIG_KEYPAD == IRIVER_H300_PAD)
      
#define BATTERY_ON BUTTON_ON
#define BATTERY_RC_ON BUTTON_RC_ON

#define BATTERY_OFF BUTTON_OFF
#define BATTERY_RC_OFF BUTTON_RC_STOP

#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "STOP"

#elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
      (CONFIG_KEYPAD == IPOD_3G_PAD) || \
      (CONFIG_KEYPAD == IPOD_1G2G_PAD)

#define BATTERY_ON  BUTTON_PLAY
#define BATTERY_OFF BUTTON_MENU
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "MENU"

#elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD

#define BATTERY_ON  BUTTON_SELECT
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD

#define BATTERY_ON  BUTTON_SELECT
#define BATTERY_OFF BUTTON_PLAY
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "PLAY"

#elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
      (CONFIG_KEYPAD == SANSA_C200_PAD) || \
      (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \
      (CONFIG_KEYPAD == SANSA_M200_PAD)
#define BATTERY_ON BUTTON_SELECT
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "POWER"

#elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
#define BATTERY_ON BUTTON_SELECT
#define BATTERY_OFF BUTTON_HOME
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "HOME"

#elif CONFIG_KEYPAD == IRIVER_H10_PAD

#define BATTERY_ON  BUTTON_PLAY
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "PLAY  - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == GIGABEAT_PAD

#define BATTERY_ON  BUTTON_SELECT
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == GIGABEAT_S_PAD

#define BATTERY_ON  BUTTON_SELECT
#define BATTERY_OFF BUTTON_BACK
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "BACK"

#elif CONFIG_KEYPAD == MROBE500_PAD

#define BATTERY_ON  BUTTON_RC_PLAY
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == MROBE100_PAD

#define BATTERY_ON  BUTTON_SELECT
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "SELECT - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == IAUDIO_M3_PAD

#define BATTERY_ON  BUTTON_PLAY
#define BATTERY_OFF BUTTON_REC
#define BATTERY_RC_ON  BUTTON_RC_PLAY
#define BATTERY_RC_OFF BUTTON_RC_REC
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "REC"

#elif CONFIG_KEYPAD == COWON_D2_PAD

#define BATTERY_OFF BUTTON_POWER
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == IAUDIO67_PAD

#define BATTERY_OFF BUTTON_POWER
#define BATTERY_OFF_TXT "POWER"
#define BATTERY_ON BUTTON_PLAY
#define BATTERY_ON_TXT  "PLAY - start"

#elif CONFIG_KEYPAD == CREATIVEZVM_PAD
#define BATTERY_ON BUTTON_PLAY
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF BUTTON_BACK
#define BATTERY_OFF_TXT "BACK"

#elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD

#define BATTERY_ON  BUTTON_MENU
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "MENU - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD

#define BATTERY_ON  BUTTON_MENU
#define BATTERY_OFF BUTTON_POWER
#define BATTERY_ON_TXT  "MENU - start"
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == ONDAVX747_PAD

#define BATTERY_OFF BUTTON_POWER
#define BATTERY_OFF_TXT "POWER"
#elif CONFIG_KEYPAD == ONDAVX777_PAD

#define BATTERY_OFF BUTTON_POWER
#define BATTERY_OFF_TXT "POWER"

#elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
      
#define BATTERY_ON      BUTTON_LEFT
#define BATTERY_OFF     BUTTON_RIGHT
#define BATTERY_ON_TXT  "LEFT"
#define BATTERY_OFF_TXT "RIGHT"

#elif CONFIG_KEYPAD == PBELL_VIBE500_PAD

#define BATTERY_ON  BUTTON_PLAY
#define BATTERY_OFF BUTTON_REC
#define BATTERY_ON_TXT  "PLAY - start"
#define BATTERY_OFF_TXT "REC"

#else
#error No keymap defined!
#endif

#ifdef HAVE_TOUCHSCREEN
#ifndef BATTERY_ON
#define BATTERY_ON       BUTTON_CENTER
#endif
#ifndef BATTERY_OFF
#define BATTERY_OFF      BUTTON_TOPLEFT
#endif
#ifndef BATTERY_ON_TXT
#define BATTERY_ON_TXT  "CENTRE - start"
#endif
#ifndef BATTERY_OFF_TXT
#define BATTERY_OFF_TXT "TOPLEFT"
#endif
#endif

/****************************** Plugin Entry Point ****************************/
int main(void);
bool exit_tsr(bool);
void thread(void);


enum plugin_status plugin_start(const void* parameter)
{
    (void)parameter;
    
    return main();
}

/* Struct for battery information */
struct batt_info
{
    /* the size of the struct elements is optimised to make the struct size
     * a power of 2 */
    long ticks;
    int eta;
    unsigned int voltage;
    short level;
    unsigned short flags;
} bat[BUF_SIZE/sizeof(struct batt_info)];

#define BUF_ELEMENTS    (sizeof(bat)/sizeof(struct batt_info))

static unsigned int thread_id;
static struct event_queue thread_q;
static bool in_usb_mode;
static unsigned int buf_idx;

bool exit_tsr(bool reenter)
{
    long button;
    (void)reenter;
    rb->lcd_clear_display();
    rb->lcd_puts_scroll(0, 0, "Batt.Bench is currently running.");
    rb->lcd_puts_scroll(0, 1, "Press " BATTERY_OFF_TXT " to cancel the test");
#ifdef HAVE_LCD_BITMAP
    rb->lcd_puts_scroll(0, 2, "Anything else will resume");
#endif
    rb->lcd_update();

    while (1)
    {
        button = rb->button_get(true);
        if (IS_SYSEVENT(button))
            continue;
        if (button == BATTERY_OFF)
        {
            rb->queue_post(&thread_q, EV_EXIT, 0);
            rb->thread_wait(thread_id);
            /* remove the thread's queue from the broadcast list */
            rb->queue_delete(&thread_q);
            return true;
        }
        else return false;
    }
}

#define BIT_CHARGER     0x1
#define BIT_CHARGING    0x2
#define BIT_USB_POWER   0x4

#define HMS(x) (x)/3600,((x)%3600)/60,((x)%3600)%60 

/* use long for aligning */
unsigned long thread_stack[THREAD_STACK_SIZE/sizeof(long)];

#if CONFIG_CHARGING || defined(HAVE_USB_POWER)
static unsigned int charge_state(void)
{
    unsigned int ret = 0;
#if CONFIG_CHARGING
    if (rb->charger_inserted())
        ret = BIT_CHARGER;
#if CONFIG_CHARGING >= CHARGING_MONITOR
    if (rb->charging_state())
        ret |= BIT_CHARGING;
#endif
#endif
#ifdef HAVE_USB_POWER
    if (rb->usb_powered())
        ret |= BIT_USB_POWER;
#endif
    return ret; 
}
#endif


static void flush_buffer(void* data)
{
    (void)data;
    int fd, secs;
    unsigned int i;

    /* don't access the disk when in usb mode, or when no data is available */
    if (in_usb_mode || (buf_idx == 0))
        return;

    fd = rb->open(BATTERY_LOG, O_RDWR | O_CREAT | O_APPEND);
    if (fd < 0)
        return;

    for (i = 0; i < buf_idx; i++)
    {
        secs = bat[i].ticks/HZ;
        rb->fdprintf(fd,
                "%02d:%02d:%02d,  %05d,     %03d%%,     "
                "%02d:%02d,         %04d,   "
#if CONFIG_CHARGING
                "  %c"
#if CONFIG_CHARGING >= CHARGING_MONITOR
                ",  %c"
#endif
#endif
#ifdef HAVE_USB_POWER
                ",  %c"
#endif
                "\n",

                HMS(secs), secs, bat[i].level,
                bat[i].eta / 60, bat[i].eta % 60,
                bat[i].voltage
#if CONFIG_CHARGING
                , (bat[i].flags & BIT_CHARGER) ? 'A' : '-'
#if CONFIG_CHARGING >= CHARGING_MONITOR
                , (bat[i].flags & BIT_CHARGING) ? 'C' : '-'
#endif
#endif
#ifdef HAVE_USB_POWER
                , (bat[i].flags & BIT_USB_POWER) ? 'U' : '-'
#endif
        );
    }
    rb->close(fd);

    buf_idx = 0;
}


void thread(void)
{
    bool exit = false;
    char *exit_reason = "unknown";
    long sleep_time = 60 * HZ;
    struct queue_event ev;
    int fd;

    in_usb_mode = false;
    buf_idx = 0;

    while (!exit)
    {
        /* add data to buffer */
        if (buf_idx < BUF_ELEMENTS)
        {
            bat[buf_idx].ticks = *rb->current_tick;
            bat[buf_idx].level = rb->battery_level();
            bat[buf_idx].eta = rb->battery_time();
            bat[buf_idx].voltage = rb->battery_voltage();
#if CONFIG_CHARGING || defined(HAVE_USB_POWER)
            bat[buf_idx].flags = charge_state();
#endif
            buf_idx++;
            rb->register_storage_idle_func(flush_buffer);
        }
        
        /* What to do when the measurement buffer is full:
           1) save our measurements to disk but waste some power doing so?
           2) throw away measurements to save some power?
           The choice made here is to save the measurements. It is quite unusual
           for this to occur because it requires > 16 hours of no disk activity.
         */
        if (buf_idx == BUF_ELEMENTS) {
            flush_buffer(NULL);
        }
        
        /* sleep some time until next measurement */
        rb->queue_wait_w_tmo(&thread_q, &ev, sleep_time);
        switch (ev.id)
        {
            case SYS_USB_CONNECTED: 
                in_usb_mode = true;
                rb->usb_acknowledge(SYS_USB_CONNECTED_ACK);
                break;
            case SYS_USB_DISCONNECTED:
                in_usb_mode = false;
                rb->usb_acknowledge(SYS_USB_DISCONNECTED_ACK);
                break;
            case SYS_POWEROFF:
                exit_reason = "power off";
                exit = true;
                break;
            case EV_EXIT:
#ifdef HAVE_LCD_BITMAP
                rb->splash(HZ, "Exiting battery_bench...");
#else
                rb->splash(HZ, "bench exit");
#endif
                exit_reason = "plugin exit";
                exit = true;
                break;
        }
    }

    /* unregister flush callback and flush to disk */
    rb->unregister_storage_idle_func(flush_buffer, true);
    
    /* log end of bench and exit reason */
    fd = rb->open(BATTERY_LOG, O_RDWR | O_CREAT | O_APPEND);
    if (fd >= 0)
    {
        rb->fdprintf(fd, "--Battery bench ended, reason: %s--\n", exit_reason);
        rb->close(fd);
    }
}


#ifdef HAVE_LCD_BITMAP
typedef void (*plcdfunc)(int x, int y, const unsigned char *str);

static void put_centered_str(const char* str, plcdfunc putsxy, int lcd_width, int line)
{
    int strwdt, strhgt;
    rb->lcd_getstringsize(str, &strwdt, &strhgt);
    putsxy((lcd_width - strwdt)/2, line*(strhgt), str);
}
#endif

int main(void)
{
    int button, fd;
    bool on = false;
#ifdef HAVE_LCD_BITMAP
    int i;
    const char *msgs[] = { "Battery Benchmark","Check file", BATTERY_LOG,
                           "for more info", BATTERY_ON_TXT, BATTERY_OFF_TXT " - quit" };
#endif    
    rb->lcd_clear_display();

#ifdef HAVE_LCD_BITMAP
    rb->lcd_clear_display();
    rb->lcd_setfont(FONT_SYSFIXED);

    for (i = 0; i<(int)(sizeof(msgs)/sizeof(char *)); i++)
        put_centered_str(msgs[i],rb->lcd_putsxy,LCD_WIDTH,i+1);
#else
    rb->lcd_puts_scroll(0, 0, "Batt.Bench.");
    rb->lcd_puts_scroll(0, 1, "PLAY/STOP");
#endif
    rb->lcd_update();
    
#ifdef HAVE_REMOTE_LCD
    rb->lcd_remote_clear_display();
    put_centered_str(msgs[0],rb->lcd_remote_putsxy,LCD_REMOTE_WIDTH,0);
    put_centered_str(msgs[sizeof(msgs)/sizeof(char*)-2],
                    rb->lcd_remote_putsxy,LCD_REMOTE_WIDTH,1);
    put_centered_str(msgs[sizeof(msgs)/sizeof(char*)-1],
                    rb->lcd_remote_putsxy,LCD_REMOTE_WIDTH,2);
    rb->lcd_remote_update();
#endif
    
    do
    {
        button = rb->button_get(true);
        switch (button)
        {
            case BATTERY_ON:
#ifdef BATTERY_RC_ON
            case BATTERY_RC_ON:
#endif                         
                on = true;
                break;        
            case BATTERY_OFF: 
#ifdef BATTERY_RC_OFF
            case BATTERY_RC_OFF:
#endif
                return PLUGIN_OK;

            default:
                if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
                    return PLUGIN_USB_CONNECTED;
        }
    }while(!on);
    
    fd = rb->open(BATTERY_LOG, O_RDONLY);
    if (fd < 0)
    {
        fd = rb->open(BATTERY_LOG, O_RDWR | O_CREAT);
        if (fd >= 0)
        {
            rb->fdprintf(fd,
                "This plugin will log your battery performance in a\n"
                "file (%s) every minute.\n"
                "To properly test your battery:\n"
                "1) Select and playback an album. "
                "(Be sure to be more than the player's buffer)\n"
                "2) Set to repeat.\n"
                "3) Let the player run completely out of battery.\n"
                "4) Recharge and copy (or whatever you want) the txt file to "
                "your computer.\n"
                "Now you can make graphs with the data of the battery log.\n"
                "Do not enter another plugin during the test or else the "
                "logging activity will end.\n\n"
                "P.S: You can decide how you will make your tests.\n"
                "Just don't open another plugin to be sure that your log "
                "will continue.\n\n",BATTERY_LOG);
            rb->fdprintf(fd,
                "Battery bench run for %s version %s\n\n"
                ,MODEL_NAME,rb->appsversion);

            rb->fdprintf(fd,
                "Battery type: %d mAh      Buffer Entries: %d\n"
                "  Time:,  Seconds:,  Level:,  Time Left:,  Voltage[mV]:"
#if CONFIG_CHARGING
                ", C:"
#endif
#if CONFIG_CHARGING >= CHARGING_MONITOR
                ", S:"
#endif
#ifdef HAVE_USB_POWER
                ", U:"
#endif
                "\n"
                ,rb->global_settings->battery_capacity,
                (int)BUF_ELEMENTS);
            rb->close(fd);
        }
        else
        {
            rb->splash(HZ / 2, "Cannot create file!");
            return PLUGIN_ERROR;
        }
    }
    else
    {
        rb->close(fd);
        fd = rb->open(BATTERY_LOG, O_RDWR | O_APPEND);
        rb->fdprintf(fd, "\n--File already present. Resuming Benchmark--\n");
        rb->fdprintf(fd,
            "Battery bench run for %s version %s\n\n"
            ,MODEL_NAME,rb->appsversion);
        rb->close(fd);
    }
    
    rb->queue_init(&thread_q, true); /* put the thread's queue in the bcast list */
    if ((thread_id = rb->create_thread(thread, thread_stack,
        sizeof(thread_stack), 0, "Battery Benchmark" 
        IF_PRIO(, PRIORITY_BACKGROUND)
        IF_COP(, CPU))) == 0)
    {
        rb->splash(HZ, "Cannot create thread!");
        return PLUGIN_ERROR;
    }
            
    rb->plugin_tsr(exit_tsr);
    
    return PLUGIN_OK;
}