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# Credit to: https://github.com/qulacs/cirq-qulacs/blob/master/benchmark/benchmark_state_vector_qulacs.py

import re
import subprocess

def parse_qasm_to_package_gen(N, input_filename, output_filename, save_data_path):

    with open(output_filename, 'w') as f:

        f.write('import numpy as np\n')
        f.write('from qat.lang.AQASM import Program, X, Y, Z, H, S, T, CNOT, RX, RY, RZ\n')
        # f.write('from qat.qpus import get_default_qpu\n')
        f.write('from qat.pylinalg import PyLinalg\n')
        f.write('from qat.lang.AQASM import AbstractGate\n')
        f.write('import os\n')
        f.write('from time import process_time, perf_counter\n')

        f.write('SX = AbstractGate("SX", [], arity=1)\n')#, matrix_generator=np.array([[(1+1j)/2., (1-1j)/2.], [(1-1j)/2., (1+1j)/2.]]))\n')
        f.write('SX.set_matrix_generator(lambda: np.array([[(1+1j)/2., (1-1j)/2.], [(1-1j)/2., (1+1j)/2.]]))\n')

        f.write('SXDG = AbstractGate("SXDG", [], arity=1)\n')#, matrix_generator=np.array([[(1-1j)/2., (1+1j)/2.], [(1+1j)/2., (1-1j)/2.]]))\n')
        f.write('SXDG.set_matrix_generator(lambda: np.array([[(1-1j)/2., (1+1j)/2.], [(1+1j)/2., (1-1j)/2.]]))\n')

        f.write('def U2_generator(p, l):\n')
        f.write('    mat = ((np.cos(0.5*(p + l)) - 1j*np.sin(0.5*(p + l)))/np.sqrt(2))*np.array([[1, -np.cos(l)-1j*np.sin(l)], [np.cos(p) + 1j*np.sin(p), np.cos(l + p) + 1j*np.sin(l + p)]])\n')
        f.write('    return np.array(mat)\n\n')

        f.write('U2 = AbstractGate("U2", [float, float], arity=1, matrix_generator=U2_generator)\n')

        f.write('def U3_generator(t, p, l):\n')
        f.write('    mat = (np.cos(0.5*(p + l)) - 1j*np.sin(0.5*(p + l)))*np.array([[np.cos(t/2.), -np.sin(t/2.)*(np.cos(l) + 1j*np.sin(l))], [np.sin(t/2.)*(np.cos(p) + 1j*np.sin(p)), np.cos(t/2.)*(np.cos(l + p) + 1j*np.sin(l + p))]])\n')
        f.write('    return np.array(mat)\n\n')

        f.write('U3 = AbstractGate("U3", [float, float, float], arity=1, matrix_generator=U3_generator)\n')

        f.write('t_sp = process_time()\n')
        f.write('t_s = perf_counter()\n')

        f.write('prog = Program()\n')
        f.write('qbits = prog.qalloc({})\n'.format(N))

        with open(input_filename, "r") as ifile:
            lines = ifile.readlines()

            lc = 0
            cirq_c = 0
            for line in lines:

                s = re.search(r"Generated|QASM|include|qreg|Qubits|cirq|x|y|z|h|rx|ry|rz|cx|u2|u3|\bsx\b|\bsxdg\b|s", line)

                if s is None:
                    continue

                elif s.group() in ['Generated', 'QASM', 'include', 'qreg', 'Qubits']:#, 'cirq']:
                    lc = lc + 1
                    f.write('# {}\n'.format(s.group()))
                    continue

                elif s.group() == 'cirq':
                    lc = lc + 1
                    f.write('# {} {}\n'.format(s.group(), cirq_c))
                    cirq_c = cirq_c + 1
                    continue

                elif s.group() == 'x' or s.group() == 'y' or s.group() == 'z' or s.group() == 's' or s.group() == 'h':
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('{}(qbits[{}])\n'.format(s.group().upper(), t_qbit))
                    continue

                elif s.group() == 'sx':
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('prog.apply(SX(), qbits[{}])\n'.format(t_qbit))

                elif s.group() == 'sxdg':
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('prog.apply(SXDG(), qbits[{}])\n'.format(t_qbit))
                    continue

                elif s.group() == 'rx' or s.group() == 'ry' or s.group() == 'rz':
                    lc = lc + 1
                    m_r = re.findall(r'\((.*?)\)', line)
                    # print(m_r)
                    if 'pi' in m_r[0] and 'e' in m_r[0]:
                        sp_str = m_r[0].split('e-')
                        m_r[0] = [re.findall(r'[-]?\d*\.\d\d*', sp_str[0])[0] + 'E-' + sp_str[1]]
                    elif 'pi' in m_r[0]:
                        m_r[0] = re.findall(r'[-]?\d*\.\d\d*', m_r[0])
                    # print(m_r)
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    # f.write('qc.add_{}gate({}, np.pi*{})\n'.format(s.group().upper(),  t_qbit, float(m_r[0][0])))
                    f.write('{}(np.pi*{})(qbits[{}])\n'.format(s.group().upper(), float(m_r[0][0]), t_qbit))
                    continue

                elif s.group() == 'cx':
                    lc = lc + 1
                    match = re.findall(r'\[\d\d*\]', line)
                    c_qbit = int(match[0].strip('[]'))
                    t_qbit = int(match[1].strip('[]'))
                    f.write('CNOT(qbits[{}], qbits[{}])\n'.format(c_qbit,  t_qbit))
                    continue

                elif s.group() == 'u2':
                    lc = lc + 1
                    m_r = re.findall(r'\((.*?,.*?)\)', line)
                    m_r = m_r[0].split(',')
                    for i, m in enumerate(m_r):
                        if 'pi' in m and 'e' in m:
                            sp_str = m_r[i].split('e-')
                            m_r[i] = [re.findall(r'[-]?\d*\.\d\d*', sp_str[0])[0] + 'E-' + sp_str[1]]
                        elif 'pi' in m:
                            m_r[i] = re.findall(r'[-]?\d*\.\d\d*', m)
                        else:
                            m_r[i] = '0'
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('prog.apply(U2(np.pi*{}, np.pi*{}), qbits[{}])\n'.format(float(m_r[0][0]), float(m_r[1][0]), t_qbit))
                    continue

                elif s.group() == 'u3':
                    lc = lc + 1
                    m_r = re.findall(r'\((.*?,.*?,.*?)\)', line)
                    m_r = m_r[0].split(',')
                    for i, m in enumerate(m_r):
                        if 'pi' in m and 'e' in m:
                            sp_str = m_r[i].split('e-')
                            m_r[i] = [re.findall(r'[-]?\d*\.\d\d*', sp_str[0])[0] + 'E-' + sp_str[1]]
                        elif 'pi' in m:
                            m_r[i] = re.findall(r'[-]?\d*\.\d\d*', m)
                        else:
                            m_r[i] = '0'
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('prog.apply(U3(np.pi*{}, np.pi*{}, np.pi*{}), qbits[{}])\n'.format(float(m_r[0][0]), float(m_r[1][0]), float(m_r[2][0]), t_qbit))
                    continue


        # f.write('qpu = get_default_qpu()\n')
        f.write('qpu = PyLinalg()\n')
        f.write('circuit = prog.to_circ()\n')
        f.write('job = circuit.to_job()\n')
        f.write('result = qpu.submit(job)\n')
        # f.write('f_state = device.run(qc).result().values[0]\n')

        f.write('t_e = perf_counter()\n')
        f.write('t_ep = process_time()\n')
        f.write('print(t_e - t_s)\n')
        f.write('print(t_ep - t_sp)\n')

        f.write('os.chdir(\'{}\')\n'.format(save_data_path))
        f.write('np.save(\'time_n{}.npy\', [t_e - t_s, t_ep - t_sp])\n'.format(N))

        # result = subprocess.run(["grep", ".", input_filename, "|", "wc", "-l"], text=True)#stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
        _cmd = "grep . " + input_filename + "| wc -l"
        lc_res = subprocess.check_output(_cmd, shell=True)
        print(int(lc_res) == lc)
        # print(lc)

# parse_qasm_to_package_gen(12, "/data/user/gangap_a/rqc/data_files/circuit_n12_m14_s0_e0_pEFGH.qasm", "n12_qulacs.py")

task = 'qft'
sim_pack = 'myqlm'
com_cap = 'mt'
prec = 'dp'

for N in range(6, 38, 2):
    input_file_path = '/data/user/gangap_a/{}_singular/qasm_files/'.format(task)
    input_file = input_file_path + 'qasm_N_{}.qasm'.format(N)

    save_file_path = '/data/user/gangap_a/{}_singular/{}/data_{}_{}'.format(task, sim_pack, com_cap, prec)

    output_file_path = '/data/user/gangap_a/{}_singular/{}/run_files_{}_{}/'.format(task, sim_pack, com_cap, prec)

    output_file = output_file_path + '{}_n{}.py'.format(task, N)
    parse_qasm_to_package_gen(N, input_file, output_file, save_file_path)


"""
for N in range(12, 42, 2):
    input_file_path = '/data/user/gangap_a/rqc/data_files/'
    input_file = input_file_path + 'circuit_n{}_m14_s0_e0_pEFGH.qasm'.format(N)

    output_file_path = '/data/user/gangap_a/rqc/qulacs/qulacs_run_files/'
    output_file = output_file_path + 'qulacs_rqc_n{}.py'.format(N)
    parse_qasm_to_package_gen(N, input_file, output_file)

for N in range(41, 51):
    input_file_path = '/data/user/gangap_a/rqc/data_files/'
    input_file = input_file_path + 'circuit_n{}_m14_s0_e0_pEFGH.qasm'.format(N)

    output_file_path = '/data/user/gangap_a/rqc/qulacs/qulacs_run_files/'
    output_file = output_file_path + 'qulacs_rqc_n{}.py'.format(N)
    parse_qasm_to_package_gen(N, input_file, output_file)

"""