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

import { IJSONSchema } from 'vs/base/common/jsonSchema';
import { Registry } from 'vs/platform/registry/common/platform';
import * as JSONContributionRegistry from 'vs/platform/jsonschemas/common/jsonContributionRegistry';
import * as nls from 'vs/nls';
import { createDecorator } from 'vs/platform/instantiation/common/instantiation';
import { LanguageId } from 'vs/editor/common/modes';
import { SnippetFile, Snippet } from 'vs/workbench/contrib/snippets/browser/snippetsFile';

export const ISnippetsService = createDecorator<ISnippetsService>('snippetService');

export interface ISnippetsService {

	_serviceBrand: undefined;

	getSnippetFiles(): Promise<SnippetFile[]>;

	getSnippets(languageId: LanguageId): Promise<Snippet[]>;

	getSnippetsSync(languageId: LanguageId): Snippet[];
}

const languageScopeSchemaId = 'vscode://schemas/snippets';
const languageScopeSchema: IJSONSchema = {
	id: languageScopeSchemaId,
	allowComments: true,
	allowsTrailingCommas: true,
	defaultSnippets: [{
		label: nls.localize('snippetSchema.json.default', "Empty snippet"),
		body: { '${1:snippetName}': { 'prefix': '${2:prefix}', 'body': '${3:snippet}', 'description': '${4:description}' } }
	}],
	type: 'object',
	description: nls.localize('snippetSchema.json', 'User snippet configuration'),
	additionalProperties: {
		type: 'object',
		required: ['prefix', 'body'],
		properties: {
			prefix: {
				description: nls.localize('snippetSchema.json.prefix', 'The prefix to used when selecting the snippet in intellisense'),
				type: ['string', 'array']
			},
			body: {
				description: nls.localize('snippetSchema.json.body', 'The snippet content. Use \'$1\', \'${1:defaultText}\' to define cursor positions, use \'$0\' for the final cursor position. Insert variable values with \'${varName}\' and \'${varName:defaultText}\', e.g. \'This is file: $TM_FILENAME\'.'),
				type: ['string', 'array'],
				items: {
					type: 'string'
				}
			},
			description: {
				description: nls.localize('snippetSchema.json.description', 'The snippet description.'),
				type: ['string', 'array']
			}
		},
		additionalProperties: false
	}
};


const globalSchemaId = 'vscode://schemas/global-snippets';
const globalSchema: IJSONSchema = {
	id: globalSchemaId,
	allowComments: true,
	allowsTrailingCommas: true,
	defaultSnippets: [{
		label: nls.localize('snippetSchema.json.default', "Empty snippet"),
		body: { '${1:snippetName}': { 'scope': '${2:scope}', 'prefix': '${3:prefix}', 'body': '${4:snippet}', 'description': '${5:description}' } }
	}],
	type: 'object',
	description: nls.localize('snippetSchema.json', 'User snippet configuration'),
	additionalProperties: {
		type: 'object',
		required: ['prefix', 'body'],
		properties: {
			prefix: {
				description: nls.localize('snippetSchema.json.prefix', 'The prefix to used when selecting the snippet in intellisense'),
				type: ['string', 'array']
			},
			scope: {
				description: nls.localize('snippetSchema.json.scope', "A list of language names to which this snippet applies, e.g. 'typescript,javascript'."),
				type: 'string'
			},
			body: {
				description: nls.localize('snippetSchema.json.body', 'The snippet content. Use \'$1\', \'${1:defaultText}\' to define cursor positions, use \'$0\' for the final cursor position. Insert variable values with \'${varName}\' and \'${varName:defaultText}\', e.g. \'This is file: $TM_FILENAME\'.'),
				type: ['string', 'array'],
				items: {
					type: 'string'
				}
			},
			description: {
				description: nls.localize('snippetSchema.json.description', 'The snippet description.'),
				type: 'string'
			}
		},
		additionalProperties: false
	}
};

const reg = Registry.as<JSONContributionRegistry.IJSONContributionRegistry>(JSONContributionRegistry.Extensions.JSONContribution);
reg.registerSchema(languageScopeSchemaId, languageScopeSchema);
reg.registerSchema(globalSchemaId, globalSchema);