// Copyright (c) 2017, 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 'dart:async' show Future;

import 'package:kernel/kernel.dart'
    show Component, Procedure, DartType, TypeParameter;

import '../base/processed_options.dart' show ProcessedOptions;

import '../fasta/compiler_context.dart' show CompilerContext;

import '../fasta/incremental_compiler.dart' show IncrementalCompiler;

import '../fasta/scanner/string_scanner.dart' show StringScanner;

import 'compiler_options.dart' show CompilerOptions;

abstract class IncrementalKernelGenerator {
  factory IncrementalKernelGenerator(CompilerOptions options, Uri entryPoint,
      [Uri initializeFromDillUri]) {
    return new IncrementalCompiler(
        new CompilerContext(
            new ProcessedOptions(options: options, inputs: [entryPoint])),
        initializeFromDillUri);
  }

  factory IncrementalKernelGenerator.fromComponent(
      CompilerOptions options, Uri entryPoint, Component component) {
    return new IncrementalCompiler.fromComponent(
        new CompilerContext(
            new ProcessedOptions(options: options, inputs: [entryPoint])),
        component);
  }

  /// Returns a component whose libraries are the recompiled libraries,
  /// or - in the case of [fullComponent] - a full Component.
  Future<Component> computeDelta({Uri entryPoint, bool fullComponent});

  /// Remove the file associated with the given file [uri] from the set of
  /// valid files.  This guarantees that those files will be re-read on the
  /// next call to [computeDelta]).
  void invalidate(Uri uri);

  /// Compile [expression] as an [Expression]. A function returning that
  /// expression is compiled.
  ///
  /// [expression] may use the variables supplied in [definitions] as free
  /// variables and [typeDefinitions] as free type variables. These will become
  /// required parameters to the compiled function. All elements of
  /// [definitions] and [typeDefinitions] will become parameters/type
  /// parameters, whether or not they appear free in [expression]. The type
  /// parameters should have a null parent pointer.
  ///
  /// [libraryUri] must refer to either a previously compiled library.
  /// [className] may optionally refer to a class within such library to use for
  /// the scope of the expression. In that case, [isStatic] indicates whether
  /// the scope can access [this].
  ///
  /// It is illegal to use "await" in [expression] and the compiled function
  /// will always be synchronous.
  ///
  /// [computeDelta] must have been called at least once prior.
  ///
  /// [compileExpression] will return [null] if the library or class for
  /// [enclosingNode] could not be found. Otherwise, errors are reported in the
  /// normal way.
  Future<Procedure> compileExpression(
      String expression,
      Map<String, DartType> definitions,
      List<TypeParameter> typeDefinitions,
      String syntheticProcedureName,
      Uri libraryUri,
      [String className,
      bool isStatic = false]);
}

bool isLegalIdentifier(String identifier) {
  return StringScanner.isLegalIdentifier(identifier);
}