#pragma once
// #include <fstream>
// #include <iostream>
#include <stdio.h>
#include <inttypes.h>
#include <unistd.h>
#include <string>
#include "overlay_params.h"
#include <mutex>
#include <condition_variable>
#include <vector>
#include <sys/param.h>
#include <algorithm>

#define METRICS_UPDATE_PERIOD_MS 500
#define METRICS_POLLING_PERIOD_MS 25
#define METRICS_SAMPLE_COUNT (METRICS_UPDATE_PERIOD_MS/METRICS_POLLING_PERIOD_MS)
#define NUM_HBM_INSTANCES 4

#define UPDATE_METRIC_AVERAGE(FIELD) do { int value_sum = 0; for (size_t s=0; s < METRICS_SAMPLE_COUNT; s++) { value_sum += metrics_buffer[s].FIELD; } amdgpu_common_metrics.FIELD = value_sum / METRICS_SAMPLE_COUNT; } while(0)
#define UPDATE_METRIC_AVERAGE_FLOAT(FIELD) do { float value_sum = 0; for (size_t s=0; s < METRICS_SAMPLE_COUNT; s++) { value_sum += metrics_buffer[s].FIELD; } amdgpu_common_metrics.FIELD = value_sum / METRICS_SAMPLE_COUNT; } while(0)
#define UPDATE_METRIC_MAX(FIELD) do { int cur_max = metrics_buffer[0].FIELD; for (size_t s=1; s < METRICS_SAMPLE_COUNT; s++) { cur_max = MAX(cur_max, metrics_buffer[s].FIELD); }; amdgpu_common_metrics.FIELD = cur_max; } while(0)
#define UPDATE_METRIC_LAST(FIELD) do { amdgpu_common_metrics.FIELD = metrics_buffer[METRICS_SAMPLE_COUNT - 1].FIELD; } while(0)
#ifdef _WIN32
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#endif

struct metrics_table_header {
	uint16_t			structure_size;
	uint8_t				format_revision;
	uint8_t				content_revision;
};

struct gpu_metrics_v1_3 {
	struct metrics_table_header	common_header;

	/* Temperature */
	uint16_t			temperature_edge;
	uint16_t			temperature_hotspot;
	uint16_t			temperature_mem;
	uint16_t			temperature_vrgfx;
	uint16_t			temperature_vrsoc;
	uint16_t			temperature_vrmem;

	/* Utilization */
	uint16_t			average_gfx_activity;
	uint16_t			average_umc_activity; // memory controller
	uint16_t			average_mm_activity; // UVD or VCN

	/* Power/Energy */
	uint16_t			average_socket_power;
	uint64_t			energy_accumulator;

	/* Driver attached timestamp (in ns) */
	uint64_t			system_clock_counter;

	/* Average clocks */
	uint16_t			average_gfxclk_frequency;
	uint16_t			average_socclk_frequency;
	uint16_t			average_uclk_frequency;
	uint16_t			average_vclk0_frequency;
	uint16_t			average_dclk0_frequency;
	uint16_t			average_vclk1_frequency;
	uint16_t			average_dclk1_frequency;

	/* Current clocks */
	uint16_t			current_gfxclk;
	uint16_t			current_socclk;
	uint16_t			current_uclk;
	uint16_t			current_vclk0;
	uint16_t			current_dclk0;
	uint16_t			current_vclk1;
	uint16_t			current_dclk1;

	/* Throttle status */
	uint32_t			throttle_status;

	/* Fans */
	uint16_t			current_fan_speed;

	/* Link width/speed */
	uint16_t			pcie_link_width;
	uint16_t			pcie_link_speed; // in 0.1 GT/s

	uint16_t			padding;

	uint32_t			gfx_activity_acc;
	uint32_t			mem_activity_acc;

	uint16_t			temperature_hbm[NUM_HBM_INSTANCES];

	/* PMFW attached timestamp (10ns resolution) */
	uint64_t			firmware_timestamp;

	/* Voltage (mV) */
	uint16_t			voltage_soc;
	uint16_t			voltage_gfx;
	uint16_t			voltage_mem;

	uint16_t			padding1;

	/* Throttle status (ASIC independent) */
	uint64_t			indep_throttle_status;
};

struct gpu_metrics_v2_3 {
	struct metrics_table_header	common_header;

	/* Temperature */
	uint16_t			temperature_gfx; // gfx temperature on APUs
	uint16_t			temperature_soc; // soc temperature on APUs
	uint16_t			temperature_core[8]; // CPU core temperature on APUs
	uint16_t			temperature_l3[2];

	/* Utilization */
	uint16_t			average_gfx_activity;
	uint16_t			average_mm_activity; // UVD or VCN

	/* Driver attached timestamp (in ns) */
	uint64_t			system_clock_counter;

	/* Power/Energy */
	uint16_t			average_socket_power; // dGPU + APU power on A + A platform
	uint16_t			average_cpu_power;
	uint16_t			average_soc_power;
	uint16_t			average_gfx_power;
	uint16_t			average_core_power[8]; // CPU core power on APUs

	/* Average clocks */
	uint16_t			average_gfxclk_frequency;
	uint16_t			average_socclk_frequency;
	uint16_t			average_uclk_frequency;
	uint16_t			average_fclk_frequency;
	uint16_t			average_vclk_frequency;
	uint16_t			average_dclk_frequency;

	/* Current clocks */
	uint16_t			current_gfxclk;
	uint16_t			current_socclk;
	uint16_t			current_uclk;
	uint16_t			current_fclk;
	uint16_t			current_vclk;
	uint16_t			current_dclk;
	uint16_t			current_coreclk[8]; // CPU core clocks
	uint16_t			current_l3clk[2];

	/* Throttle status (ASIC dependent) */
	uint32_t			throttle_status;

	/* Fans */
	uint16_t			fan_pwm;

	uint16_t			padding[3];

	/* Throttle status (ASIC independent) */
	uint64_t			indep_throttle_status;

	/* Average Temperature */
	uint16_t			average_temperature_gfx; // average gfx temperature on APUs
	uint16_t			average_temperature_soc; // average soc temperature on APUs
	uint16_t			average_temperature_core[8]; // average CPU core temperature on APUs
	uint16_t			average_temperature_l3[2];
};

/* This structure is used to communicate the latest values of the amdgpu metrics.
 * The direction of communication is amdgpu_polling_thread -> amdgpu_get_metrics().
 */
struct amdgpu_common_metrics {
	/* Load level: averaged across the sampling period */
	uint16_t gpu_load_percent;
	// uint16_t mem_load_percent;

	/* Power usage: averaged across the sampling period */
	float average_gfx_power_w;
	float average_cpu_power_w;

	/* Clocks: latest value of the clock */
	uint16_t current_gfxclk_mhz;
	uint16_t current_uclk_mhz;

	/* Temperatures: maximum values over the sampling period */
	uint16_t soc_temp_c;
	uint16_t gpu_temp_c;
	uint16_t apu_cpu_temp_c;

	/* throttling status */
	bool is_power_throttled;
	bool is_current_throttled;
	bool is_temp_throttled;
	bool is_other_throttled;

	uint16_t fan_speed;
};

bool amdgpu_verify_metrics(const std::string& path);
void amdgpu_get_metrics(uint32_t deviceID);
extern std::string metrics_path;
extern std::condition_variable amdgpu_c;
extern bool amdgpu_run_thread;
void amdgpu_get_instant_metrics(struct amdgpu_common_metrics *metrics);
void amdgpu_metrics_polling_thread();
void amdgpu_get_samples_and_copy(struct amdgpu_common_metrics metrics_buffer[METRICS_SAMPLE_COUNT], bool &gpu_load_needs_dividing);
void amdgpu_trottling_thread(std::vector<float> &power, std::vector<float> &thermal);

class Throttling {
	public:
		std::vector<float> power;
		std::vector<float> thermal;
		int64_t indep_throttle_status;

		Throttling()
			: power(200, 0.0f),
			thermal(200, 0.0f) {}

		void update(){
			if (((indep_throttle_status >> 0) & 0xFF) != 0)
				power.push_back(0.1);
			else
				power.push_back(0);


			if (((indep_throttle_status >> 32) & 0xFFFF) != 0)
				thermal.push_back(0.1);
			else
				thermal.push_back(0);

			power.erase(power.begin());
			thermal.erase(thermal.begin());
		}

		bool power_throttling(){
			return std::find(power.begin(), power.end(), 0.1f) != power.end();
		}

		bool thermal_throttling(){
			return std::find(thermal.begin(), thermal.end(), 0.1f) != thermal.end();
		}
};

extern std::unique_ptr<Throttling> throttling;
