/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import * as mode from './jsonMode';
import { Emitter, IEvent, languages } from './fillers/monaco-editor-core'

// --- JSON configuration and defaults ---------

export interface DiagnosticsOptions {
	/**
	 * If set, the validator will be enabled and perform syntax validation as well as schema based validation.
	 */
	readonly validate?: boolean;
	/**
	 * If set, comments are tolerated. If set to false, syntax errors will be emitted for comments.
	 */
	readonly allowComments?: boolean;
	/**
	 * A list of known schemas and/or associations of schemas to file names.
	 */
	readonly schemas?: {
		/**
		 * The URI of the schema, which is also the identifier of the schema.
		 */
		readonly uri: string;
		/**
		 * A list of file names that are associated to the schema. The '*' wildcard can be used. For example '*.schema.json', 'package.json'
		 */
		readonly fileMatch?: string[];
		/**
		 * The schema for the given URI.
		 */
		readonly schema?: any;
	}[];
	/**
	 *  If set, the schema service would load schema content on-demand with 'fetch' if available
	 */
	readonly enableSchemaRequest?: boolean;
}

export interface ModeConfiguration {
	/**
	 * Defines whether the built-in documentFormattingEdit provider is enabled.
	 */
	readonly documentFormattingEdits?: boolean;

	/**
	 * Defines whether the built-in documentRangeFormattingEdit provider is enabled.
	 */
	readonly documentRangeFormattingEdits?: boolean;

	/**
	 * Defines whether the built-in completionItemProvider is enabled.
	 */
	readonly completionItems?: boolean;

	/**
	 * Defines whether the built-in hoverProvider is enabled.
	 */
	readonly hovers?: boolean;

	/**
	 * Defines whether the built-in documentSymbolProvider is enabled.
	 */
	readonly documentSymbols?: boolean;

	/**
	 * Defines whether the built-in tokens provider is enabled.
	 */
	readonly tokens?: boolean;

	/**
	 * Defines whether the built-in color provider is enabled.
	 */
	readonly colors?: boolean;

	/**
	 * Defines whether the built-in foldingRange provider is enabled.
	 */
	readonly foldingRanges?: boolean;

	/**
	 * Defines whether the built-in diagnostic provider is enabled.
	 */
	readonly diagnostics?: boolean;

	/**
	 * Defines whether the built-in selection range provider is enabled.
	 */
	readonly selectionRanges?: boolean;

}

export interface LanguageServiceDefaults {
	readonly languageId: string;
	readonly onDidChange: IEvent<LanguageServiceDefaults>;
	readonly diagnosticsOptions: DiagnosticsOptions;
	readonly modeConfiguration: ModeConfiguration;
	setDiagnosticsOptions(options: DiagnosticsOptions): void;
	setModeConfiguration(modeConfiguration: ModeConfiguration): void;
}

class LanguageServiceDefaultsImpl implements LanguageServiceDefaults {

	private _onDidChange = new Emitter<LanguageServiceDefaults>();
	private _diagnosticsOptions: DiagnosticsOptions;
	private _modeConfiguration: ModeConfiguration;
	private _languageId: string;

	constructor(languageId: string, diagnosticsOptions: DiagnosticsOptions, modeConfiguration: ModeConfiguration) {
		this._languageId = languageId;
		this.setDiagnosticsOptions(diagnosticsOptions);
		this.setModeConfiguration(modeConfiguration);
	}

	get onDidChange(): IEvent<LanguageServiceDefaults> {
		return this._onDidChange.event;
	}

	get languageId(): string {
		return this._languageId;
	}

	get modeConfiguration(): ModeConfiguration {
		return this._modeConfiguration;
	}

	get diagnosticsOptions(): DiagnosticsOptions {
		return this._diagnosticsOptions;
	}

	setDiagnosticsOptions(options: DiagnosticsOptions): void {
		this._diagnosticsOptions = options || Object.create(null);
		this._onDidChange.fire(this);
	}

	setModeConfiguration(modeConfiguration: ModeConfiguration): void {
		this._modeConfiguration = modeConfiguration || Object.create(null);
		this._onDidChange.fire(this);
	};
}

const diagnosticDefault: Required<DiagnosticsOptions> = {
	validate: true,
	allowComments: true,
	schemas: [],
	enableSchemaRequest: false
};

const modeConfigurationDefault: Required<ModeConfiguration> = {
	documentFormattingEdits: true,
	documentRangeFormattingEdits: true,
	completionItems: true,
	hovers: true,
	documentSymbols: true,
	tokens: true,
	colors: true,
	foldingRanges: true,
	diagnostics: true,
	selectionRanges: true
}

export const jsonDefaults: LanguageServiceDefaults = new LanguageServiceDefaultsImpl('json', diagnosticDefault, modeConfigurationDefault);

// export to the global based API
(<any>languages).json = { jsonDefaults };

// --- Registration to monaco editor ---

function getMode(): Promise<typeof mode> {
	return import('./jsonMode');
}

languages.register({
	id: 'json',
	extensions: ['.json', '.bowerrc', '.jshintrc', '.jscsrc', '.eslintrc', '.babelrc', '.har'],
	aliases: ['JSON', 'json'],
	mimetypes: ['application/json'],
});

languages.onLanguage('json', () => {
	getMode().then(mode => mode.setupMode(jsonDefaults));
});