# 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, precision, input_filename, output_filename):

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

        f.write('#include <stdio.h>\n')
        f.write('#include <math.h>\n')
        f.write('#include <time.h>\n')
        f.write('#include <stdlib.h>\n')

        f.write('#include "QuEST.h"\n')

        if precision == 'single':
            f.write('#define QuEST_PREC 1\n')
        elif precision == 'double':
            f.write('#define QuEST_PREC 2\n')

        f.write('#define BILLION 1E9\n')

        f.write('\n')

        f.write('void u2(Qureg qubits, const int q, double p, double l) {\n')
        f.write('ComplexMatrix2 u = {\n')
        f.write('.real = {{cos(0.5*(p+l))/sqrt(2), -cos(0.5*(p-l))/sqrt(2)},\n')
        f.write('\t{cos(0.5*(p-l))/sqrt(2), cos(0.5*(p+l))/sqrt(2)}},\n')
        f.write('.imag = {{-sin(0.5*(p+l))/sqrt(2), sin(0.5*(p-l))/sqrt(2)},\n')
        f.write('\t{sin(0.5*(p-l))/sqrt(2), sin(0.5*(p+l))/sqrt(2)}}};\n')
        f.write('unitary(qubits, q, u);\n')
        f.write('}\n\n')

        f.write('void u3(Qureg qubits, const int q, double t, double p, double l) {\n')
        f.write('ComplexMatrix2 u = {\n')
        f.write('.real = {{cos(0.5*(p+l))*cos(0.5*t), -cos(0.5*(p-l))*sin(0.5*t)},\n')
        f.write('\t{cos(0.5*(p-l))*sin(0.5*t), cos(0.5*(p+l))*cos(0.5*t)}},\n')
        f.write('.imag = {{-sin(0.5*(p+l))*cos(0.5*t), sin(0.5*(p-l))*sin(0.5*t)},\n')
        f.write('\t{sin(0.5*(p-l))*sin(0.5*t), sin(0.5*(p+l))*cos(0.5*t)}}};\n')
        f.write('unitary(qubits, q, u);\n')
        f.write('}\n\n')

        f.write('void pauliSX(Qureg qubits, const int q) {\n')
        f.write('ComplexMatrix2 u = {\n')
        f.write('.real = {{0.5, 0.5},\n')
        f.write('\t{0.5, 0.5}},\n')
        f.write('.imag = {{0.5, -0.5},\n')
        f.write('\t{-0.5, 0.5}}};\n')
        f.write('unitary(qubits, q, u);\n')
        f.write('}\n\n')

        f.write('void pauliSXDG(Qureg qubits, const int q) {\n')
        f.write('ComplexMatrix2 u = {\n')
        f.write('.real = {{0.5, 0.5},\n')
        f.write('\t{0.5, 0.5}},\n')
        f.write('.imag = {{-0.5, 0.5},\n')
        f.write('\t{0.5, -0.5}}};\n')
        f.write('unitary(qubits, q, u);\n')
        f.write('}\n\n')

        f.write('int main(int argc, char* argv[]){\n')

        f.write('\tQuESTEnv env = createQuESTEnv();\n')
        f.write('\tQureg qubits = createQureg({}, env);\n'.format(N))

        f.write('\tstruct timespec requestStart, requestEnd;\n')
        f.write('\tclock_gettime(CLOCK_REALTIME, &requestStart);\n')

        lc = 0

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

            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() == 'sx' or s.group() == 'sxdg':
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('\tpauli{}(qubits, {});\n'.format(s.group().upper(), t_qbit))
                    continue

                elif s.group() == 'h':
                    lc = lc + 1
                    m_i = re.findall(r'\[\d\d*\]', line)
                    t_qbit = int(m_i[0].strip('[]'))
                    f.write('\thadamard(qubits, {});\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('\trotate{}(qubits, {}, M_PI*{});\n'.format(s.group()[1].upper(), t_qbit, float(m_r[0][0])))
                    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('\tsGate(qubits, {});\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('\tcontrolledNot(qubits, {}, {});\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('\tu2(qubits, {}, M_PI*{}, M_PI*{});\n'.format(t_qbit, float(m_r[0][0]), float(m_r[1][0])))
                    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('\tu3(qubits, {}, M_PI*{}, M_PI*{}, M_PI*{});\n'.format(t_qbit, float(m_r[0][0]), float(m_r[1][0]),float(m_r[2][0])))
                    continue

        f.write('\tdestroyQureg(qubits, env);\n')
        f.write('\tdestroyQuESTEnv(env);\n')
        f.write('\tclock_gettime(CLOCK_REALTIME, &requestEnd);\n')

        f.write('\tdouble accum = (requestEnd.tv_sec - requestStart.tv_sec) + (requestEnd.tv_nsec - requestStart.tv_nsec)/BILLION;\n')
        f.write('\tprintf( "%lf, ", accum );\n')
        f.write('\treturn 0;\n')
        f.write('}')

        # 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)

task = 'rqc'
sim_pack = 'quest'
com_cap = 'mt'
prec = 'dp'

for N in range(12, 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{}.c'.format(task, N)
    parse_qasm_to_package_gen(N, 'double', input_file, output_file)


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/quest/QuEST/rqc/quest_sp_run_files/'
    output_file = output_file_path + 'quest_rqc_n{}.c'.format(N)
    parse_qasm_to_package_gen(N, 'float', 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/quest/QuEST/rqc/quest_sp_run_files/'
    output_file = output_file_path + 'quest_rqc_n{}.c'.format(N)
    parse_qasm_to_package_gen(N, 'float', input_file, output_file)

"""