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#!/usr/bin/env python3
from datetime import datetime
import configparser as ConfigParser
import json
import optparse
import os
import sqlalchemy
import string
import subprocess
import sys
import CondCore.Utilities.conddblib as conddb

##############################################
def getCommandOutput(command):
##############################################
    """This function executes `command` and returns it output.
    Arguments:
    - `command`: Shell command to be invoked by this function.
    """
    child = os.popen(command)
    data = child.read()
    err = child.close()
    if err:
        print ('%s failed w/ exit code %d' % (command, err))
        sys.exit(1)  # This will stop the script immediately with the failure exit code
    print(data)
    return data

##############################################
def getCerts() -> str:
##############################################
    cert_path = os.getenv('X509_USER_CERT', '')
    key_path = os.getenv('X509_USER_KEY', '')

    certs = ""
    if cert_path:
        certs += f' --cert {cert_path}'
    else:
        print("No certificate, nor proxy provided for Tier0 access")
    if key_path:
        certs += f' --key {key_path}'
    return certs

##############################################
def build_curl_command(url, proxy="", certs="", timeout=30, retries=3, user_agent="MyUserAgent"):
##############################################
    """Builds the curl command with the appropriate proxy, certs, and options."""
    cmd = f'/usr/bin/curl -k -L --user-agent "{user_agent}" '

    if proxy:
        cmd += f'--proxy {proxy} '
    else:
        cmd += f'{certs} '

    cmd += f'--connect-timeout {timeout} --retry {retries} {url}'
    return cmd

##############################################
def get_hlt_fcsr(session):
##############################################
    RunInfo = session.get_dbtype(conddb.RunInfo)
    lastRun = session.query(sqlalchemy.func.max(RunInfo.run_number)).scalar()
    fcsr = lastRun+1
    return int(fcsr)

##############################################
def fetch_data_from_url(url, proxy="", certs=""):
##############################################
    cmd = build_curl_command(url, proxy=proxy, certs=certs)

    try:
        out = subprocess.check_output(cmd, shell=True)
    except subprocess.CalledProcessError as e:
        print(f"Error executing curl command: {e}")
        return None

    if not out.strip():
        print("Received an empty response from the server.")
        return None

    try:
        response = json.loads(out)
    except json.JSONDecodeError as e:
        print(f"Failed to decode JSON: {e}")
        print(f"Raw output was: {out}")
        return None

    # Ensure the expected structure is there
    if "result" not in response or len(response["result"]) == 0:
        print("Unexpected response format or empty result.")
        return None

    return response["result"][0]  # Return the first result entry (this is where individual functions can extract specific fields)

##############################################
def getFCSR(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/firstconditionsaferun"
    response = fetch_data_from_url(url, proxy, certs)

    if response is None:
        return None

    return int(response)  # Assuming 'response' is already an integer value in this case

##############################################
def getPromptGT(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/reco_config"
    response = fetch_data_from_url(url, proxy, certs)

    if response is None:
        return None

    return response.get('global_tag')

##############################################
def getExpressGT(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/express_config"
    response = fetch_data_from_url(url, proxy, certs)

    if response is None:
        return None

    return response.get('global_tag')

##############################################
def _getFCSR(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/firstconditionsaferun"
    cmd = build_curl_command(url, proxy=proxy, certs=certs)
    out = subprocess.check_output(cmd, shell=True)
    response = json.loads(out)["result"][0]
    return int(response)

##############################################
def _getPromptGT(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/reco_config"
    cmd = build_curl_command(url, proxy=proxy, certs=certs)
    out = subprocess.check_output(cmd, shell=True)
    response = json.loads(out)["result"][0]['global_tag']
    return response

##############################################
def _getExpressGT(proxy="", certs=""):
##############################################
    url = "https://cmsweb.cern.ch/t0wmadatasvc/prod/express_config"
    cmd = build_curl_command(url, proxy=proxy, certs=certs)
    out = subprocess.check_output(cmd, shell=True)
    response = json.loads(out)["result"][0]['global_tag']
    return response

##############################################
def resetSynchonization(db_name):
##############################################
    import sqlite3

    # Connect to the SQLite database
    conn = sqlite3.connect(db_name)

    # Create a cursor object to execute SQL commands
    cursor = conn.cursor()

    # Execute the SQL command to update the database
    cursor.execute("UPDATE TAG SET SYNCHRONIZATION='any' WHERE SYNCHRONIZATION='express';")

    # Commit the changes and close the connection
    conn.commit()
    conn.close()

##############################################
if __name__ == "__main__":
##############################################

    parser = optparse.OptionParser(usage = 'Usage: %prog [options] <file> [<file> ...]\n')
     
    parser.add_option('-t', '--validationTag',
                      dest = 'validationTag',
                      default = "SiStripApvGainAfterAbortGap_PCL_multirun_v0_prompt",
                      help = 'validation tag',
                      )
     
    parser.add_option('-s', '--since',
                      dest = 'since',
                      default = -1,
                      help = 'sinces to copy from validation tag',
                      )

    parser.add_option('-p', '--proxy',
                      dest = 'proxy',
                      default = "",
                      help = 'proxy to use for curl requests',
                      )

    parser.add_option('-u', '--user-mode',
                      dest='user_mode',
                      action='store_true',
                      default=False,
                      help='Enable user mode with specific X509 user certificate and key')

    (options, arguments) = parser.parse_args()

    if options.user_mode:
        os.environ['X509_USER_KEY'] = os.path.expanduser('~/.globus/userkey.pem')
        os.environ['X509_USER_CERT'] = os.path.expanduser('~/.globus/usercert.pem')
        print("User mode enabled. Using X509_USER_KEY and X509_USER_CERT from ~/.globus/")

    certs = ""
    if not options.proxy:
        certs = getCerts()

    FCSR = getFCSR(proxy=options.proxy, certs=certs)
    promptGT  = getPromptGT(proxy=options.proxy, certs=certs)
    expressGT = getExpressGT(proxy=options.proxy, certs=certs)

    con = conddb.connect(url = conddb.make_url("pro"))
    session = con.session()

    HLTFCSR = get_hlt_fcsr(session)
    print ("Current next HLT run", HLTFCSR, "| curret FCSR:", FCSR ,"| Express Global Tag",expressGT,"| Prompt Global Tag",promptGT)
    IOV     = session.get_dbtype(conddb.IOV)
    TAG     = session.get_dbtype(conddb.Tag)
    GT      = session.get_dbtype(conddb.GlobalTag)
    GTMAP   = session.get_dbtype(conddb.GlobalTagMap)
    RUNINFO = session.get_dbtype(conddb.RunInfo)

    myGTMap = session.query(GTMAP.record, GTMAP.label, GTMAP.tag_name).\
        filter(GTMAP.global_tag_name == str(expressGT)).\
        order_by(GTMAP.record, GTMAP.label).\
        all()

    # Check if the query result is empty
    if not myGTMap:
        print("No records found in the GTMap.")
        sys.exit(1)

    ## connect to prep DB and get the list of IOVs to look at
    con2 = conddb.connect(url = conddb.make_url("dev"))
    session2 = con2.session()
    validationTagIOVs = session2.query(IOV.since,IOV.payload_hash,IOV.insertion_time).filter(IOV.tag_name == options.validationTag).all()

    ### fill the list of IOVs to be validated
    IOVsToValidate=[]
    if(options.since==-1):
        IOVsToValidate.append(validationTagIOVs[-1][0])
        print("Changing the default validation tag since to:",IOVsToValidate[0])
        
    else:
        for entry in validationTagIOVs:
            if(options.since!=1 and int(entry[0])>=int(options.since)):
                print("Appending to the validation list:",entry[0],entry[1],entry[2])
                IOVsToValidate.append(entry[0])
            
    for element in myGTMap:
        #print element
        Record = element[0]
        Label  = element[1]
        Tag = element[2]
        if(Record=="SiStripApvGain2Rcd"):
            TagIOVs = session.query(IOV.since,IOV.payload_hash,IOV.insertion_time).filter(IOV.tag_name == Tag).all()
            sorted_TagIOVs = sorted(TagIOVs, key=lambda x: x[0])
            lastG2Payload = sorted_TagIOVs[-1]
            print("Last G2 Prompt payload has IOV since:",lastG2Payload[0],"payload hash:",lastG2Payload[1],"insertion time:",lastG2Payload[2])

            # Get and print the current working directory
            current_directory = os.getcwd()
            print("Current Working Directory:", current_directory)

            # Construct the conddb_import command using f-strings for better readability
            command = (
                f'conddb_import -c sqlite_file:toCompare.db '
                f'-f frontier://FrontierProd/CMS_CONDITIONS '
                f'-i {Tag} -t {Tag} -b {lastG2Payload[0]}'
            )
            print(command)
            getCommandOutput(command)

            # set syncrhonization to any
            resetSynchonization("toCompare.db")

            for i,theValidationTagSince in enumerate(IOVsToValidate):

                # Construct the conddb_import command, modifying the 'since' value if necessary
                since_value = HLTFCSR + i if theValidationTagSince < lastG2Payload[0] else theValidationTagSince
                command = (
                    f'conddb_import -c sqlite_file:toCompare.db '
                    f'-f frontier://FrontierPrep/CMS_CONDITIONS '
                    f'-i {options.validationTag} -t {Tag} -b {since_value}'
                )

                # Print and execute the conddb_import command
                if theValidationTagSince < lastG2Payload[0]:
                    print("The last available IOV in the validation tag is older than the current last express IOV, taking Express FCSR (HLT) as a since!")

                print(command)
                getCommandOutput(command)

                # Construct the testCompareSiStripG2Gains.sh command, adjusting the 'since' value similarly
                since_value = HLTFCSR + i if theValidationTagSince < lastG2Payload[0] else theValidationTagSince
                command = (
                    f'${{CMSSW_BASE}}/src/CondCore/SiStripPlugins/scripts/testCompareSiStripG2Gains.sh '
                    f'{Tag} {lastG2Payload[0]} {since_value} {current_directory}/toCompare.db'
                )

                # Print and execute the testCompareSiStripG2Gains.sh command
                print(command)
                getCommandOutput(command)