/*
 * Copyright (c) Hisilicon Technologies Co., Ltd. 2020-2020. All rights reserved.
 * Description: driver
 * Author:
 * Create: 2020-10-12
 */

#include <linux/stddef.h> /* for NULL */
#include <linux/slab.h>
#include <linux/module.h>
#include "linux/huanglong/securec.h"

#define LOG_BUF_SIZE 1024

/*
 * To solve the symbolic dependence of dftevent, the following weak symbol definition is provided.
 *
 * [WARNNING]
 */

struct dft_event;
int drv_event_create_impl(unsigned int eventid, struct dft_event **event);
int drv_event_report_impl(struct dft_event *event);
void drv_event_destroy_impl(struct dft_event *event);
int drv_event_put_integral_impl(struct dft_event *event, const char *key, long value);
int drv_event_put_string_impl(struct dft_event *event, const char *key, const char *value);
int drv_event_set_time_impl(struct dft_event *event, long long seconds);
int drv_event_add_file_path_impl(struct dft_event *event, const char *path);
int drv_hwlog_to_write_impl(int prio, int bufid, const char *tag, const char *msg);

int __weak drv_event_create_impl(unsigned int eventid, struct dft_event **event)
{
	struct dft_event *phony_event = NULL;
	unsigned long phony_size = sizeof(unsigned int);

	if (event == NULL) {
		printk("%s[%d]: invalid parameter!\n", __FUNCTION__, __LINE__);
		return -1;
	}

	phony_event = kmalloc(phony_size, GFP_KERNEL);
	if (phony_event == NULL) {
		printk("%s[%d]: malloc memory failed\n", __FUNCTION__, __LINE__);
		return -1;
	}

	*event = phony_event;

	return 0;
}

int __weak drv_event_report_impl(struct dft_event *event)
{
	return 0;
}

void __weak drv_event_destroy_impl(struct dft_event *event)
{
	if (event == NULL) {
		return;
	}
	kfree(event);
	event = NULL;
}

int __weak drv_event_put_integral_impl(struct dft_event *event, const char *key, long value)
{
	return 0;
}

int __weak drv_event_put_string_impl(struct dft_event *event, const char *key, const char *value)
{
	return 0;
}

int __weak drv_event_set_time_impl(struct dft_event *event, long long seconds)
{
	return 0;
}

int __weak drv_event_add_file_path_impl(struct dft_event *event, const char *path)
{
	return 0;
}

int __weak drv_hwlog_to_write_impl(int prio, int bufid, const char *tag, const char *msg)
{
	return 0;
}

static int system_state_is_running(void)
{
	// [system_state] is a global var from kernel,
	// valued {SYSTEM_BOOTING, SYSTEM_SCHEDULING, SYSTEM_RUNNING, SYSTEM_HALT, SYSTEM_POWER_OFF, SYSTEM_RESTART}.
	if (system_state == SYSTEM_RUNNING) {
		return 1;
	}

	switch (system_state) {
	case SYSTEM_BOOTING:
		printk("%s[%d]: system_state is SYSTEM_BOOTING\n", __FUNCTION__, __LINE__);
		break;
	case SYSTEM_SCHEDULING:
		printk("%s[%d]: system_state is SYSTEM_SCHEDULING\n", __FUNCTION__, __LINE__);
		break;
	case SYSTEM_HALT:
		printk("%s[%d]: system_state is SYSTEM_HALT\n", __FUNCTION__, __LINE__);
		break;
	case SYSTEM_POWER_OFF:
		printk("%s[%d]: system_state is SYSTEM_POWER_OFF\n", __FUNCTION__, __LINE__);
		break;
	case SYSTEM_RESTART:
		printk("%s[%d]: system_state is SYSTEM_RESTART\n", __FUNCTION__, __LINE__);
		break;
	default:
		break;
	}

	return 0;
}

int drv_event_create(unsigned int eventid, struct dft_event **event)
{
	return drv_event_create_impl(eventid, event);
}
EXPORT_SYMBOL(drv_event_create);

int drv_event_set_time(struct dft_event *event, long long seconds)
{
	if (system_state_is_running() == 0) {
		// todo: fault report through bbox
		printk("%s[%d]: drv_event_set_time failed, seconds=%lld\n", __FUNCTION__, __LINE__, seconds);
		return 0;
	}

	return drv_event_set_time_impl(event, seconds);
}
EXPORT_SYMBOL(drv_event_set_time);

int drv_event_put_integral(struct dft_event *event, const char *key, long value)
{
	if (system_state_is_running() == 0) {
		// todo: fault report through bbox
		printk("%s[%d]: drv_event_put_integral failed, key=%s, value=%ld\n", __FUNCTION__, __LINE__, key, value);
		return 0;
	}

	return drv_event_put_integral_impl(event, key, value);
}
EXPORT_SYMBOL(drv_event_put_integral);

int drv_event_put_string(struct dft_event *event, const char *key, const char *value)
{
	if (system_state_is_running() == 0) {
		// todo: fault report through bbox
		printk("%s[%d]: drv_event_put_string failed, key=%s, value=%s\n", __FUNCTION__, __LINE__, key, value);
		return 0;
	}

	return drv_event_put_string_impl(event, key, value);
}
EXPORT_SYMBOL(drv_event_put_string);

int drv_event_add_file_path(struct dft_event *event, const char *path)
{
	if (system_state_is_running() == 0) {
		// todo: fault report through bbox
		printk("%s[%d]: drv_event_add_file_path failed, path=%s\n", __FUNCTION__, __LINE__, path);
		return 0;
	}

	return drv_event_add_file_path_impl(event, path);
}
EXPORT_SYMBOL(drv_event_add_file_path);

int drv_event_report(struct dft_event *event)
{
	if (system_state_is_running() == 0) {
		// todo: fault report through bbox
		printk("%s[%d]: drv_event_report failed\n", __FUNCTION__, __LINE__);
		return 0;
	}

	return drv_event_report_impl(event);
}
EXPORT_SYMBOL(drv_event_report);

void drv_event_destroy(struct dft_event *event)
{
	drv_event_destroy_impl(event);
	event = NULL;
}
EXPORT_SYMBOL(drv_event_destroy);

int drv_hwlog_to_write(int prio, int bufid, const char *tag, const char *fmt, ...)
{
	va_list ap;
	char buff[LOG_BUF_SIZE];
	va_start(ap, fmt);
	if (vsnprintf_s(buff, LOG_BUF_SIZE, LOG_BUF_SIZE - 1, fmt, ap) < 0) {
		printk("drv_hwlog_to_write error.\n");
		va_end(ap);
		return -1;
	}
	va_end(ap);
	return drv_hwlog_to_write_impl(prio, bufid, tag, buff);
}
EXPORT_SYMBOL(drv_hwlog_to_write);