export class LogDownloadController {
    constructor(private dispatcher: any) {
        chrome.runtime.onMessage.addListener((request) => {
            switch (request.message) {
                case 'DownloadLogsPrompt': {
                    this.dispatcher.logMessage('Saving log file...');

                    //data is obsfucated, so it's not in an array format, so we need to convert it to an array
                    this.saveLogArray([request.data]);
                }
            }
        });
    }

    private onFileWriterSuccess() {
        this.dispatcher.logMessage('logDownload.ts: onFileWriterSuccess(): Log download completed.');

        this.dispatcher.sendToWebView(
            {
                message: 'UI_LogSaveStatus',
                status: {
                    success: true
                }
            },
            false
        );
    }

    private onFileWriterFailure(e: any) {
        this.dispatcher.logMessage('logDownload.ts: onFileWriterFailure(): Write failed: ' + e);
        this.dispatcher.sendToWebView(
            {
                message: 'UI_LogSaveStatus',
                status: {
                    success: false,
                    error: e
                }
            },
            false
        );
    }

    private saveLogArray(logArray: any[]) {
        let blob = new Blob(logArray, { type: 'text/plain' });
        let fileDialogDescription = chrome.i18n.getMessage('log_files_file_filter') || 'Log files (*.log)';
        //@ts-ignore
        chrome.fileSystem.chooseEntry(
            {
                type: 'saveFile',
                suggestedName: 'lsa-chromebook.log',
                accepts: [
                    {
                        description: fileDialogDescription,
                        extensions: ['log']
                    }
                ],
                acceptsAllTypes: true
            },
            (fileEntry: any) => {
                if (fileEntry) {
                    fileEntry.createWriter((fileWriter: any) => {
                        fileWriter.onwriteend = () => this.onFileWriterSuccess();
                        fileWriter.onerror = (e: any) => this.onFileWriterFailure(e);
                        fileWriter.write(blob);
                    });
                } else {
                    this.dispatcher.logError(
                        'saveLogArray: fileEntry is undefined: ' + JSON.stringify(chrome.runtime.lastError)
                    );
                }
            }
        );
    }
}