#!/usr/bin/env python
# Copyright (C) 2013 Google Inc. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
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#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
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# in the documentation and/or other materials provided with the
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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import copy
import sys

import hasher
import json5_generator
import name_utilities
import template_expander

from aria_properties import ARIAReader
from json5_generator import Json5File


def _symbol(entry):
    return 'k' + entry['name'].to_upper_camel_case()


class MakeQualifiedNamesWriter(json5_generator.Writer):
    default_parameters = {}
    default_metadata = {
        'attrsNullNamespace': None,
        'export': '',
        'namespace': '',
        'namespacePrefix': '',
        'namespaceURI': '',
    }
    filters = {
        'hash': hasher.hash,
        'symbol': _symbol,
    }

    def __init__(self, json5_file_paths, output_dir):
        super(MakeQualifiedNamesWriter, self).__init__(None, output_dir)
        self._input_files = copy.copy(json5_file_paths)
        assert len(json5_file_paths) <= 3, 'MakeQualifiedNamesWriter requires at most 3 in files, got %d.' % len(json5_file_paths)

        # Input files are in a strict order with more optional files *first*:
        # 1) ARIA properties
        # 2) Tags
        # 3) Attributes

        if len(json5_file_paths) >= 3:
            aria_json5_filename = json5_file_paths.pop(0)
            self.aria_reader = ARIAReader(aria_json5_filename)
        else:
            self.aria_reader = None

        if len(json5_file_paths) >= 2:
            tags_json5_filename = json5_file_paths.pop(0)
            self.tags_json5_file = Json5File.load_from_files([tags_json5_filename], self.default_metadata, self.default_parameters)
        else:
            self.tags_json5_file = None

        self.attrs_json5_file = Json5File.load_from_files([json5_file_paths.pop()], self.default_metadata, self.default_parameters)

        if self.aria_reader is not None:
            self.attrs_json5_file.merge_from(self.aria_reader.attributes_list())

        self.namespace = self._metadata('namespace')
        cpp_namespace = self.namespace.lower() + '_names'
        namespace_prefix = self._metadata('namespacePrefix') or 'k'

        namespace_uri = self._metadata('namespaceURI')
        use_namespace_for_attrs = self.attrs_json5_file.metadata['attrsNullNamespace'] is None

        self._outputs = {
            (self.namespace.lower() + "_names.h"): self.generate_header,
            (self.namespace.lower() + "_names.cc"): self.generate_implementation,
        }
        qualified_header = self._relative_output_dir + self.namespace.lower() + '_names.h'
        self._template_context = {
            'attrs': self.attrs_json5_file.name_dictionaries,
            'cpp_namespace': cpp_namespace,
            'export': self._metadata('export'),
            'header_guard': self.make_header_guard(qualified_header),
            'input_files': self._input_files,
            'namespace': self.namespace,
            'namespace_prefix': namespace_prefix,
            'namespace_uri': namespace_uri,
            'tags': self.tags_json5_file.name_dictionaries if self.tags_json5_file else [],
            'this_include_path': qualified_header,
            'use_namespace_for_attrs': use_namespace_for_attrs,
        }

    def _metadata(self, name):
        metadata = self.attrs_json5_file.metadata[name].strip('"')
        if self.tags_json5_file:
            assert metadata == self.tags_json5_file.metadata[name].strip('"'), 'Both files must have the same %s.' % name
        return metadata

    @template_expander.use_jinja('templates/make_qualified_names.h.tmpl', filters=filters)
    def generate_header(self):
        return self._template_context

    @template_expander.use_jinja('templates/make_qualified_names.cc.tmpl', filters=filters)
    def generate_implementation(self):
        return self._template_context


if __name__ == "__main__":
    json5_generator.Maker(MakeQualifiedNamesWriter).main()