'use strict';

import * as vscode from 'vscode';

import * as proxy from './jediProxy';

import * as telemetryContracts from "../common/telemetryContracts";

export class PythonHoverProvider implements vscode.HoverProvider {

private jediProxyHandler: proxy.JediProxyHandler<proxy.ICompletionResult, vscode.Hover>;

public constructor(context: vscode.ExtensionContext) {

this.jediProxyHandler = new proxy.JediProxyHandler(context, null, PythonHoverProvider.parseData);

}

private static parseData(data: proxy.ICompletionResult): vscode.Hover {

if (data && data.items.length > 0) {

var definition = data.items[0];

var txt = definition.description || definition.text;

return new vscode.Hover({ language: "python", value: txt });

}

return null;

}

public provideHover(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken): Thenable<vscode.Hover> {

return new Promise<vscode.Hover>((resolve, reject) => {

var filename = document.fileName;

if (document.lineAt(position.line).text.match(/^\s*\/\//)) {

return resolve();

}

if (position.character <= 0) {

return resolve();

}

var source = document.getText();

var range = document.getWordRangeAtPosition(position);

if (range == undefined || range.isEmpty) {

return resolve();

}

var columnIndex = range.end.character;

var cmd: proxy.ICommand<proxy.ICompletionResult> = {

telemetryEvent: telemetryContracts.IDE.HoverDefinition,

command: proxy.CommandType.Completions,

fileName: filename,

columnIndex: columnIndex,

lineIndex: position.line,

source: source

};

this.jediProxyHandler.sendCommand(cmd, resolve, token);

});

}

}