import * as vscode from 'vscode';

import { AllowNull } from '../../../global';
import { RawSymbol, Range } from '../../../hdlParser/common';

// interface DocSymbolContainer {
//     docSymbol: AllowNull<vscode.DocumentSymbol>,
//     range: AllowNull<Range>
// };

// const vhdlSymbolKind: Record<string, vscode.SymbolKind> = {
//     entity: vscode.SymbolKind.Interface,
//     port: vscode.SymbolKind.Property,
//     architecture: vscode.SymbolKind.Variable,
//     signal: vscode.SymbolKind.Property
// };

// class VhdlDocSymbolProvider implements vscode.DocumentSymbolProvider {
//     public async provideDocumentSymbols(document: vscode.TextDocument, token: vscode.CancellationToken): Promise<vscode.DocumentSymbol[]> {
        
//         const path = document.fileName;
//         const vhdlAll = await hdlSymbolStorage.getSymbol(path);     
        
//         if (!vhdlAll || !vhdlAll.content) {
//             return [];
//         } else {
//             const symbols = vhdlAll.content;
//             const symbolInfos = this.makeDocumentSymbols(document, symbols);
//             return symbolInfos;
//         }
//     }


//     private makeDocumentSymbols(document: vscode.TextDocument, symbols: RawSymbol[]): vscode.DocumentSymbol[] {
//         const docSymbols: vscode.DocumentSymbol[] = [];

//         for (const symbol of symbols) {
//             const symbolStart = new vscode.Position(symbol.range.start.line - 1, symbol.range.start.character);
//             const symbolEnd = new vscode.Position(symbol.range.end.line - 1, symbol.range.end.character);
//             const symbolRange = new vscode.Range(symbolStart, symbolEnd);

//             if (symbol.type === 'entity') {
//                 const docSymbol = new vscode.DocumentSymbol(symbol.name, 
//                                                             symbol.name, 
//                                                             vhdlSymbolKind[symbol.type], 
//                                                             symbolRange,
//                                                             symbolRange);
//                 docSymbols.push(docSymbol);
//             } else if (symbol.type === 'port') {
//                 const parentEntity = docSymbols[docSymbols.length - 1];
//                 const docSymbol = new vscode.DocumentSymbol(symbol.name, 
//                                                             symbol.name, 
//                                                             vhdlSymbolKind[symbol.type], 
//                                                             symbolRange,
//                                                             symbolRange);
//                 parentEntity.children.push(docSymbol);
//             } else if (symbol.type === 'architecture') {
//                 const docSymbol = new vscode.DocumentSymbol(symbol.name, 
//                                                             symbol.name, 
//                                                             vhdlSymbolKind[symbol.type], 
//                                                             symbolRange,
//                                                             symbolRange);
//                 docSymbols.push(docSymbol);
//             } else if (symbol.type === 'signal') {
//                 const parentArchitecture = docSymbols[docSymbols.length - 1];
//                 if (parentArchitecture.kind === vhdlSymbolKind['architecture']) {
//                     const docSymbol = new vscode.DocumentSymbol(symbol.name, 
//                                                                 symbol.name, 
//                                                                 vhdlSymbolKind[symbol.type], 
//                                                                 symbolRange,
//                                                                 symbolRange);
//                     parentArchitecture.children.push(docSymbol);
//                 }
//             }
//         }

//         return docSymbols;
//     }
// }

// const vhdlDocSymbolProvider = new VhdlDocSymbolProvider();

// export {
//     vhdlDocSymbolProvider
// };