// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:ffigen/src/code_generator.dart';
import 'data.dart';

/// Utility functions to check whether a binding should be parsed or not
/// based on filters.

// Stores binding names already scene. Mp key is same as their original name.
Map<String, Struc> _structs = {};
Map<String, Func> _functions = {};
Map<String, EnumClass> _enumClass = {};
Map<String, String> _macros = {};

bool shouldIncludeStruct(String name) {
  if (_structs.containsKey(name) || name == '') {
    return false;
  } else if (config.structDecl == null ||
      config.structDecl.shouldInclude(name)) {
    return true;
  } else {
    return false;
  }
}

bool shouldIncludeFunc(String name) {
  if (_functions.containsKey(name) || name == '') {
    return false;
  } else if (config.functionDecl == null ||
      config.functionDecl.shouldInclude(name)) {
    return true;
  } else {
    return false;
  }
}

bool shouldIncludeEnumClass(String name) {
  if (_enumClass.containsKey(name) || name == '') {
    return false;
  } else if (config.enumClassDecl == null ||
      config.enumClassDecl.shouldInclude(name)) {
    return true;
  } else {
    return false;
  }
}

bool shouldIncludeMacro(String name) {
  if (_macros.containsKey(name) || name == '') {
    return false;
  } else if (config.macroDecl == null || config.macroDecl.shouldInclude(name)) {
    return true;
  } else {
    return false;
  }
}

/// Cache for headers.
final _headerCache = <String, bool>{};

/// True if a cursor should be included based on headers config, used on root
/// declarations.
bool shouldIncludeRootCursor(String sourceFile) {
  // Handle null in case of system headers or macros.
  if (sourceFile == null) {
    return false;
  }

  // Add header to cache if its not.
  if (!_headerCache.containsKey(sourceFile)) {
    _headerCache[sourceFile] =
        config.headers.includeFilter.shouldInclude(sourceFile);
  }

  return _headerCache[sourceFile];
}

bool isSeenStruc(String originalName) {
  return _structs.containsKey(originalName);
}

void addStrucToSeen(String originalName, Struc struc) {
  _structs[originalName] = struc;
}

Struc getSeenStruc(String originalName) {
  return _structs[originalName];
}

bool isSeenFunc(String originalName) {
  return _functions.containsKey(originalName);
}

void addFuncToSeen(String originalName, Func func) {
  _functions[originalName] = func;
}

Func getSeenFunc(String originalName) {
  return _functions[originalName];
}

bool isSeenEnumClass(String originalName) {
  return _enumClass.containsKey(originalName);
}

void addEnumClassToSeen(String originalName, EnumClass enumClass) {
  _enumClass[originalName] = enumClass;
}

EnumClass getSeenEnumClass(String originalName) {
  return _enumClass[originalName];
}

bool isSeenMacro(String originalName) {
  return _macros.containsKey(originalName);
}

void addMacroToSeen(String originalName, String macro) {
  _macros[originalName] = macro;
}

String getSeenMacro(String originalName) {
  return _macros[originalName];
}