//
//  LocalLogger.swift
//
//  Format logs in CococaLumberjack
//
//

import Foundation
import CocoaLumberjackSwift

var logFileDataArray: [NSData] {
    get {
        let logFilePaths = fileLogger.logFileManager.sortedLogFilePaths as [String]
        var logFileDataArray = [NSData]()
        for logFilePath in logFilePaths {
            let fileURL = NSURL(fileURLWithPath: logFilePath)
            if let logFileData = try? NSData(contentsOf: fileURL as URL, options: NSData.ReadingOptions.mappedIfSafe) {
                // Insert at front to reverse the order, so that oldest logs appear first.
                logFileDataArray.insert(logFileData, at: 0)
            }
        }
        return logFileDataArray
    }
}

func setupLocalLogger() {
    DDLog.add(DDOSLogger.sharedInstance)
    DDOSLogger.sharedInstance.logFormatter = LogFormatter()
     
    fileLogger.rollingFrequency = TimeInterval(60*60*24)  // 24 hours
    fileLogger.logFileManager.maximumNumberOfLogFiles = 7
    fileLogger.logFormatter = LogFormatter()
    DDLog.add(fileLogger)
    writeCommonInfoToLog()
}

func writeCommonInfoToLog() {
    let nsObject: String? = Bundle.main.infoDictionary!["CFBundleShortVersionString"] as? String
    let systemVersion = UIDevice.current.systemVersion
    let accessLevel = accessLevel()
    DDLogInfo("")
    DDLogInfo("")
    DDLogInfo("************************************************")
    DDLogInfo("Lockdown iOS: v" + nsObject!)
    DDLogInfo("iOS version: " + systemVersion)
    DDLogInfo("Device model: " + UIDevice.current.modelName)
    DDLogInfo("Access level: " + accessLevel)
    DDLogInfo("************************************************")
}

fileprivate func accessLevel() -> String {
    if UserDefaults.hasSeenUniversalPaywall {
        return "Universal"
    } else if UserDefaults.hasSeenAnonymousPaywall {
        return "Anonymous"
    } else if UserDefaults.hasSeenAdvancedPaywall {
        return "Advanced"
    } else {
        return "Basic"
    }
}

class LogFormatter: DDDispatchQueueLogFormatter {
    let dateFormatter: DateFormatter
    
    override init() {
        dateFormatter = DateFormatter()
        dateFormatter.formatterBehavior = .behavior10_4
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        
        super.init()
    }
    
    override func format(message logMessage: DDLogMessage) -> String {
        let dateAndTime = dateFormatter.string(from: logMessage.timestamp)
        
        var logType = "LOG"
        switch logMessage.level {
        case .debug:
            logType = "DEBUG"
        case .error:
            logType = "ERROR"
        case .info:
            logType = "INFO"
        case .verbose:
            logType = "VERBOSE"
        case .warning:
            logType = "WARNING"
        default:
            logType = "LOG"
        }
        
        return "\(logType): \(dateAndTime) [\(logMessage.fileName):\(logMessage.line)]: \(logMessage.message)"
    }
}