# 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 os\n')
        f.write('from time import process_time, perf_counter\n')
        f.write('from projectq.backends import Simulator\n')
        f.write('from projectq import MainEngine\n')
        f.write('from projectq.meta import Compute, Control, Loop, Uncompute\n')
        f.write('from projectq.ops import All, H, Measure, X, Z, Rx, Rz, Ry, CNOT, SGate, SqrtXGate, QubitOperator, MatrixGate, get_inverse\n')
        f.write('import numpy as np\n\n')

        f.write('def U2(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 MatrixGate(mat)\n\n')

        f.write('def U3(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 MatrixGate(mat)\n\n')

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

        # f.write('eng = MainEngine(backend=Simulator(gate_fusion=True))\n')
        f.write('eng = MainEngine(backend=Simulator())\n')
        f.write('qureg = eng.allocate_qureg({})\n'.format(N))

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

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

                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('R{}(np.pi*{}) | qureg[{}]\n'.format(s.group()[1], float(m_r[0][0]),  t_qbit))
                    continue

                elif s.group() == "s":
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('SGate() | qureg[{}]\n'.format(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 | (qureg[{}], qureg[{}])\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('U2(np.pi*{}, np.pi*{}) | qureg[{}]\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('U3(np.pi*{}, np.pi*{}, np.pi*{}) | qureg[{}]\n'.format(float(m_r[0][0]), float(m_r[1][0]),float(m_r[2][0]), t_qbit))
                    continue

        f.write('eng.flush()\n')
        f.write('All(Measure) | qureg\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, "qasm_ex.qasm", "n12_projectq.py")


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

for N in range(6, 40, 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)

r"""
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/projectq/projectq_run_files/'
    output_file = output_file_path + 'projectq_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/projectq/projectq_run_files/'
    output_file = output_file_path + 'projectq_rqc_n{}.py'.format(N)
    parse_qasm_to_package_gen(N, input_file, output_file)

"""