# Path: sdopt/nodes/attributes.py
# class NodeAttr:
#     bounds    =  1
#     con_num   =  2
#     d_term    =  3
#     display   =  4
#     input_ord =  5
#     n_term    =  6
#     name      =  7
#     node_id   =  8
#     number    =  9
#     operation = 10
#     type      = 11
#     var_num   = 12
# 
# Path: sdopt/representation/dag_util.py
# def get_pretty_type_str(dag, n):
#     return dag.node[n][NodeAttr.type] + '_node'
# 
# Path: sdopt/util/stringIO.py

# 
# Path: sdopt/util/redirect_stdout.py
# @contextmanager
# def redirect_stdout(ostream):
#     oldstdout = sys.stdout
#     sys.stdout = ostream
#     try:
#         yield ostream
#     finally:
#         sys.stdout = oldstdout


import math
from operator import itemgetter
from string import Template
from contextlib import closing
from six.moves import zip as izip
from ..nodes.attributes import NodeAttr
from ..representation.dag_util import get_pretty_type_str
from ..util.stringIO import stringIO
from ..util.redirect_stdout import redirect_stdout
    return lmul_d_term_str(d_term) + '(' + nomin + ')/(' + denom + ')'

def pow_node_str(n, d, con_dag, base_vars):
    mult, pred = binary_node_inedge_mult(n, d, con_dag)
    d_term = d.get(NodeAttr.d_term, 0.0)
    base  = lambda_to_str(mult[0]) + idx_str(pred[0], base_vars, con_dag)
    base += add_d_term_str(d_term)
    power = lambda_to_str(mult[1]) + idx_str(pred[1], base_vars, con_dag)
    return  'pow(' + base + ', ' + power + ')'

# TODO Can this thing have a d term?
def exp_node_str(n, d, con_dag, base_vars):
    return 'exp(' + lin_comb_str(n, d, con_dag, base_vars) + ')'

def log_node_str(n, d, con_dag, base_vars):
    return 'log(' + lin_comb_str(n, d, con_dag, base_vars) + ')'

def sqr_node_str(n, d, con_dag, base_vars):
    return '(' + lin_comb_str(n, d, con_dag, base_vars) + ')**2'

### Why are these two needed?
def var_node_str(n, d, con_dag, base_vars):
    # Assumes a defined variable
    assert n not in base_vars
    assert NodeAttr.input_ord in d, '%d, %s' % (n, d)
    pred = d[NodeAttr.input_ord]
    assert len(pred)==1
    return sum_node_str(n, d, con_dag, base_vars)

def num_node_str(n, d, con_dag, base_vars):

# Path: sdopt/nodes/attributes.py
# class NodeAttr:
#     bounds    =  1
#     con_num   =  2
#     d_term    =  3
#     display   =  4
#     input_ord =  5
#     n_term    =  6
#     name      =  7
#     node_id   =  8
#     number    =  9
#     operation = 10
#     type      = 11
#     var_num   = 12
# 
# Path: sdopt/representation/dag_util.py
# def get_pretty_type_str(dag, n):
#     return dag.node[n][NodeAttr.type] + '_node'
# 
# Path: sdopt/util/stringIO.py

# 
# Path: sdopt/util/redirect_stdout.py
# @contextmanager
# def redirect_stdout(ostream):
#     oldstdout = sys.stdout
#     sys.stdout = ostream
#     try:
#         yield ostream
#     finally:
#         sys.stdout = oldstdout


# Path: sdopt/nodes/reverse_ad.py
import math
from operator import itemgetter
from string import Template
from contextlib import closing
from six.moves import zip as izip
from ..nodes.attributes import NodeAttr
from ..representation.dag_util import get_pretty_type_str
from ..util.stringIO import stringIO
from ..util.redirect_stdout import redirect_stdout

    return lmul_d_term_str(d_term) + '(' + nomin + ')/(' + denom + ')'

def pow_node_str(n, d, con_dag, base_vars):
    mult, pred = binary_node_inedge_mult(n, d, con_dag)
    d_term = d.get(NodeAttr.d_term, 0.0)
    base  = lambda_to_str(mult[0]) + idx_str(pred[0], base_vars, con_dag)
    base += add_d_term_str(d_term)
    power = lambda_to_str(mult[1]) + idx_str(pred[1], base_vars, con_dag)
    return  'pow(' + base + ', ' + power + ')'

# TODO Can this thing have a d term?
def exp_node_str(n, d, con_dag, base_vars):
    return 'exp(' + lin_comb_str(n, d, con_dag, base_vars) + ')'

def log_node_str(n, d, con_dag, base_vars):
    return 'log(' + lin_comb_str(n, d, con_dag, base_vars) + ')'

def sqr_node_str(n, d, con_dag, base_vars):
    return '(' + lin_comb_str(n, d, con_dag, base_vars) + ')**2'

### Why are these two needed?
def var_node_str(n, d, con_dag, base_vars):
    # Assumes a defined variable
    assert n not in base_vars
    assert NodeAttr.input_ord in d, '%d, %s' % (n, d)
    pred = d[NodeAttr.input_ord]
    assert len(pred)==1
    return sum_node_str(n, d, con_dag, base_vars)

def num_node_str(n, d, con_dag, base_vars):

    return str(d[NodeAttr.number])