from collections import defaultdict
from .decode import BilinearDecoder
from .weights import init_glorot


class Data(object):
    def __init__(self):
        self.node_types = []
        self.relation_types = []
        self.decoder_types = defaultdict(lambda: BilinearDecoder)
        self.latent_node = []

    def add_node_type(self, name, count, latent_length):
        self.node_types.append(name)
        self.latent_node.append(init_glorot(count, latent_length))

    def add_relation(self, node_type_row, node_type_column, adjacency_matrix, name):
        n = len(self.node_types)
        if node_type_row >= n or node_type_column >= n:
            raise ValueError('Node type index out of bounds, add node type first')
        self.relation_types.append((node_type_row, node_type_column, adjacency_matrix, name))
        _ = self.decoder_types[(node_type_row, node_type_column)]

    def set_decoder_type(self, node_type_row, node_type_column, decoder_class):
        if (node_type_row, node_type_column) not in self.decoder_types:
            raise ValueError('Relation type not found, add relation first')
        self.decoder_types[(node_type_row, node_type_column)] = decoder_class

    def get_adjacency_matrices(self, node_type_row, node_type_column):
        rels = list(filter(lambda a: a[0] == node_type_row and a[1] == node_type_column), self.relation_types)
        if len(rels) == 0:



    def __repr__(self):
        n = len(self.node_types)
        if n == 0:
            return 'Empty GNN Data'
        s = ''
        s += 'GNN Data with:\n'
        s += '- ' + str(n) + ' node type(s):\n'
        for nt in self.node_types:
            s += '  - ' + nt + '\n'
        if len(self.relation_types) == 0:
            s += '- No relation types\n'
            return s.strip()
        s += '- ' + str(len(self.relation_types)) + ' relation type(s):\n'
        for i in range(n):
            for j in range(n):
                rels = list(filter(lambda a: a[0] == i and a[1] == j, self.relation_types))
                if len(rels) == 0:
                    continue
                # dir = '<->' if i == j else '->'
                dir = '--'
                s += '  - ' + self.node_types[i] + ' ' + dir + ' ' + self.node_types[j] + ' (' + self.decoder_types[(i, j)].__name__ + '):\n'
                for r in rels:
                    s += '    - ' + r[3] + '\n'
        return s.strip()