from lib import config as config_module
from lib import logging as logging_lib
from lib import get_specs

config = config_module.config
log = logging_lib.log

import subprocess
import pynvml
import json

is_hive = False
all_gpus_data_list=[]
get_data_fail=False

def init(gpu_specs_file=None):
    global is_hive, all_gpus_data_list, get_data_fail
    log.info("Loading GPU OC specs [ working ]")
    try:
        pynvml.nvmlInit()
        kernel = get_specs.get_kernel()
        if "hive" in kernel:
            is_hive=True
        
        specs_file_loc = gpu_specs_file if gpu_specs_file else config.gpu_specs_file
        regenerate_specs = False
        parsed_specs={}
        try:
            with open(specs_file_loc, "r") as specs_file:
                parsed_specs = json.loads(specs_file.read())
        except Exception as specs_load_fail:
            log.error(f"Failed loading gpu_specs_file ({specs_load_fail}) | regenerating...")
            regenerate_specs=True
        
        parsed_specs_keys = parsed_specs.keys()
        gpu_count = pynvml.nvmlDeviceGetCount()
        for i in range(0,gpu_count):
            if regenerate_specs:
                break
            gpu_handle = pynvml.nvmlDeviceGetHandleByIndex(i)
            gpu_uuid = pynvml.nvmlDeviceGetUUID(gpu_handle)
            if not f"{i}-{gpu_uuid}" in parsed_specs_keys:
                parsed_specs={}
                regenerate_specs=True
                break
        
        if regenerate_specs:
            for i in range(0,gpu_count):
                gpu_spec={}
                gpu_handle = pynvml.nvmlDeviceGetHandleByIndex(i)
                gpu_uuid = pynvml.nvmlDeviceGetUUID(gpu_handle)
                power_limits = pynvml.nvmlDeviceGetPowerManagementLimitConstraints(gpu_handle)
                min_power_limit = int(power_limits[0] / 1000.0)
                max_power_limit = int(power_limits[1] / 1000.0)
                gpu_spec["default_power_limit"] = int(pynvml.nvmlDeviceGetPowerManagementDefaultLimit(gpu_handle) / 1000.0)
                gpu_spec["power_limits"] = [min_power_limit, max_power_limit]
                gpu_spec["name"] = pynvml.nvmlDeviceGetName(gpu_handle)

                pci_info = pynvml.nvmlDeviceGetPciInfo(gpu_handle)
                pci_bus_id = pci_info.bus
                pci_device_id = pci_info.device
                pci_domain_id = pci_info.domain
                gpu_spec["pci_core"] = f"{pci_domain_id}:{pci_bus_id:02d}:{pci_device_id:02d}.0"

                mem_range = get_hive_clock_range(is_hive, i, "mem")
                core_range = get_hive_clock_range(is_hive, i, "core")
                if type(mem_range) != list:
                    pynvml.nvmlDeviceSetMemoryLockedClocks(gpu_handle, 200, 300) # Force low clocks, so the GPU can't crash when testing if under load
                    failure_min, min_oc_solution = pinpoint_oc_limits_negative(gpu_handle)
                    failure_max, max_oc_solution = pinpoint_oc_limits_positive(gpu_handle)
                    if (not failure_min) and (not failure_max):
                        mem_range=[min_oc_solution, max_oc_solution]
                    pynvml.nvmlDeviceSetMemClkVfOffset(gpu_handle, 0)
                    pynvml.nvmlDeviceResetMemoryLockedClocks(gpu_handle)
                if type(core_range) != list:
                    pynvml.nvmlDeviceSetGpuLockedClocks(gpu_handle, 300, 350) # Force low clocks, so the GPU can't crash when testing if under load
                    failure_min, min_oc_solution = pinpoint_oc_limits_negative(gpu_handle, True)
                    failure_max, max_oc_solution = pinpoint_oc_limits_positive(gpu_handle, True)
                    if (not failure_min) and (not failure_max):
                        core_range=[min_oc_solution, max_oc_solution]
                    pynvml.nvmlDeviceSetGpcClkVfOffset(gpu_handle, 0)
                    pynvml.nvmlDeviceResetGpuLockedClocks(gpu_handle)
                if type(mem_range) == list and type(core_range) == list and len(mem_range)==2 and len(core_range)==2:
                    gpu_spec["mem"]=mem_range
                    gpu_spec["core"]=core_range
                else:
                    get_data_fail=True

                parsed_specs[f"{i}-{gpu_uuid}"]=gpu_spec
            with open(specs_file_loc, "w") as specs_file:
                json.dump(parsed_specs, specs_file)

        if not get_data_fail:
            parsed_specs_keys=parsed_specs.keys()
            for key in parsed_specs_keys:
                all_gpus_data_list.append(parsed_specs[key])
    except Exception as e:
        get_data_fail=True
        log.error("Loading GPU OC specs [ fail ]")
    if not get_data_fail:
        log.success("Loading GPU OC specs [ success ]")

    print(all_gpus_data_list)
    # Load GPU specs

def get_gpu_oc_specs():
    global get_data_fail
    if get_data_fail:
        return False
    else:
        return all_gpus_data_list

def shutdown():
    pynvml.nvmlShutdown()

def handle_nn(input_int):
    if abs(4293967-input_int) < 10000:
        return input_int-4293967
    elif abs(8589934-input_int) < 10000:
        return input_int-8589934
    else:
        return input_int

def pinpoint_find_dicts_negative(data):
    false_success_items = [d for d in data if not d['success']]
    true_success_items = [d for d in data if d['success']]
    highest_false_success = max(false_success_items, key=lambda x: x['offset'], default=None)
    lowest_true_success = min(true_success_items, key=lambda x: x['offset'], default=None)
    return highest_false_success, lowest_true_success

def pinpoint_find_dicts_positive(data):
    false_success_items = [d for d in data if not d['success']]
    true_success_items = [d for d in data if d['success']]
    lowest_false_success = min(false_success_items, key=lambda x: x['offset'], default=None)
    highest_true_success = max(true_success_items, key=lambda x: x['offset'], default=None)
    return highest_true_success, lowest_false_success

def pinpoint_oc_limits_negative(gpu_handle, core=False):
    step_cnt = 0
    found_solution = None
    init_negative_max = -19855 # Probably
    history_info = [{"offset": init_negative_max*2, "success":False}]
    failure = False
    max_step_cnt = 20
    try:
        while found_solution == None and step_cnt<max_step_cnt and not failure:
            step_cnt+=1
            #print("STEP", step_cnt)
            #print(history_info)
            highest_false_success, lowest_true_success = pinpoint_find_dicts_negative(history_info)
            test_offset = None
            if lowest_true_success == None:
                test_offset = int(highest_false_success["offset"]/2)
            elif highest_false_success != None:
                test_offset = int((highest_false_success["offset"]+lowest_true_success["offset"])/2)
                if not step_cnt<max_step_cnt:
                    found_solution=lowest_true_success["offset"]
                    test_offset=None
                elif test_offset==lowest_true_success["offset"]:
                    found_solution=test_offset
                    test_offset=None

            if test_offset != None:
                any_exception = False
                try:
                    if core:
                        pynvml.nvmlDeviceSetGpcClkVfOffset(gpu_handle, test_offset)
                    else:
                        pynvml.nvmlDeviceSetMemClkVfOffset(gpu_handle, test_offset)
                except Exception as e:
                    any_exception=True
                    if not "Unknown Error" in str(e):
                        failure=True
                history_info.append({"offset": test_offset, "success":not any_exception})
    except Exception as e:
        failure=True
    return failure, found_solution

def pinpoint_oc_limits_positive(gpu_handle, core=False):
    step_cnt = 0
    found_solution = None
    init_negative_max = 20000 # Probably
    history_info = [{"offset": init_negative_max*2, "success":False}]
    failure = False
    max_step_cnt = 20
    try:
        while found_solution == None and step_cnt<max_step_cnt and not failure:
            step_cnt+=1
            #print("STEP", step_cnt)
            #print(history_info)
            highest_true_success, lowest_false_success = pinpoint_find_dicts_positive(history_info)
            test_offset = None
            if highest_true_success == None:
                test_offset = int(lowest_false_success["offset"]/2)
            elif lowest_false_success != None:
                test_offset = int((highest_true_success["offset"]+lowest_false_success["offset"])/2)
                if not step_cnt<max_step_cnt:
                    found_solution=highest_true_success["offset"]
                    test_offset=None
                elif test_offset==highest_true_success["offset"]:
                    found_solution=test_offset
                    test_offset=None

            if test_offset != None:
                any_exception = False
                try:
                    if core:
                        pynvml.nvmlDeviceSetGpcClkVfOffset(gpu_handle, test_offset)
                    else:
                        pynvml.nvmlDeviceSetMemClkVfOffset(gpu_handle, test_offset)
                except Exception as e:
                    any_exception=True
                    if not "Unknown Error" in str(e):
                        failure=True
                history_info.append({"offset": test_offset, "success":not any_exception})
    except Exception as e:
        failure=True
    return failure, found_solution

def set_oc(settings):
    try:
        gpu_count = pynvml.nvmlDeviceGetCount()
        settings_keys = settings.keys()
        for oc_gpu_index in settings_keys:
            if oc_gpu_index.isdigit():
                oc_gpu_index=int(oc_gpu_index)
                if oc_gpu_index < gpu_count and type(settings[str(oc_gpu_index)])==dict:
                    gpu_oc_config = settings[str(oc_gpu_index)]
                    gpu_possible_ranges = all_gpus_data_list[oc_gpu_index]
                    gpu_handle = pynvml.nvmlDeviceGetHandleByIndex(oc_gpu_index)
                    if "core" in gpu_oc_config:
                        wanted_core_clock = gpu_oc_config["core"]
                        if gpu_possible_ranges["core"][0] <= wanted_core_clock and wanted_core_clock <= gpu_possible_ranges["core"][1]:
                            pynvml.nvmlDeviceSetGpcClkVfOffset(gpu_handle, wanted_core_clock)
                        else:
                            log.error(f"Requested OC for GPU:{oc_gpu_index} (CORE) out of bound | {wanted_core_clock} | [{gpu_possible_ranges["core"][0]}, {gpu_possible_ranges["core"][1]}]")
                    if "mem" in gpu_oc_config:
                        wanted_mem_clock = gpu_oc_config["mem"]
                        if gpu_possible_ranges["mem"][0] <= wanted_mem_clock and wanted_mem_clock <= gpu_possible_ranges["mem"][1]:
                            pynvml.nvmlDeviceSetGpcClkVfOffset(gpu_handle, wanted_core_clock)
                        else:
                            log.error(f"Requested OC for GPU:{oc_gpu_index} (MEMORY) out of bound | {wanted_mem_clock} | [{gpu_possible_ranges["mem"][0]}, {gpu_possible_ranges["mem"][1]}]")
                    if "pl" in gpu_oc_config:
                        wanted_power_limit_milliwatts = gpu_oc_config["pl"]*1000 # convert W to mW
                        if gpu_possible_ranges["power_limits"][0] <= gpu_oc_config["pl"] and gpu_oc_config["pl"] <= gpu_possible_ranges["power_limits"][1]:
                            pynvml.nvmlDeviceSetPowerManagementLimit(gpu_handle, wanted_power_limit_milliwatts)
                        else:
                            log.error(f"Requested OC for GPU:{oc_gpu_index} (POWER LIMIT) out of bound | {gpu_oc_config["pl"]} | [{gpu_possible_ranges["power_limits"][0]}, {gpu_possible_ranges["power_limits"][1]}]")
        return True
    except Exception as e:
        log.error(f"set_oc | ERROR | {e}")
        return False



def get_hive_clock_range(is_hive, gpu_index, part):
    if is_hive:
        try:
            flag = "--setmemoffset" if part=="mem" else "--setcoreoffset"
            cmd = ["bash",'-c',f"nvtool -i 0 {flag} -100000"]

            result = subprocess.run(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
            lines = result.stdout.decode().splitlines()
            stripped_lines = [line.strip() for line in lines]
            non_empty_lines = [line for line in stripped_lines if line]

            device_id = None
            result=[]
            for non_empty_line in non_empty_lines:
                if non_empty_line[:8]=="DEVICE #":
                    device_id = int(non_empty_line[8:].replace(':',''))
                elif " is not in range of " in non_empty_line and device_id!=None and device_id==gpu_index:
                    splited_line = non_empty_line.split(" is not in range of ",1)[1].split(' ',4)
                    min_val = int(splited_line[0])
                    max_val = int(splited_line[2])
                    result=[min_val, max_val]
            if len(result)==0:
                return False
            else:
                return result
        except Exception as e:
            return False
    else:
        return False