#!/usr/bin/env python
# coding: utf-8

# # Projectq Tutorials
# 
# Due to the very different nature of how projectq works, we only implemented a wrapper around their `MainEngine`. But instead of simulating the circuit on the fly, it only creates a QLM circuit progressively, it can then output the QLM circuit using the `projectq_to_qlm` method.
# 
# 
# ## Projectq to QLM conversion
# 
# Here is an example that shows how one can convert projectq circuits into QLM circuits.

# In[ ]:


from projectq.cengines import MainEngine
from projectq.ops import H, CX, All, Measure

from qat.interop.projectq.converters import AqasmPrinter, AqasmEngine

# this first engine is only used as a workaround for some issues
# only engine you should be interacting with is the AqasmEngine
aq = AqasmPrinter(MainEngine)
eng = AqasmEngine(aq, engine_list=[aq])

qreg = eng.allocate_qureg(2)

H | qreg[0]
CX | (qreg[0], qreg[1])

All(Measure) | qreg

# Generate the QLM circuit with the to_qlm_circ method
qlm_circuit = eng.projectq_to_qlm()

from qat.core.util import extract_syntax

for entry in qlm_circuit.ops:
    # no need to print measures
    if entry.gate is None:
        continue
    print("Gate {} with params {} on qbits {}"
          .format(*extract_syntax(qlm_circuit.gateDic[entry.gate],
                                qlm_circuit.gateDic), entry.qbits))