/*
Copyright © 2020 zhiqiang feng fengzhq@it2000.com.cn

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package cmd

import (
	"fmt"
	"os"
	"time"

	rotatelogs "github.com/lestrrat-go/file-rotatelogs"
	"github.com/spf13/cobra"
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"

	"it2000.com.cn/tele-recv/config"
	"it2000.com.cn/tele-recv/utils"
)

const ModeName = "TELEGRAM_MODE"

var (
	cfgFile string

	// Legacy global vars for backward compatibility with test command
	device        string
	baudrate      int
	dbFile        string
	dbInit        bool
	socketAddress string
	pulsarUrl     string
	topic         string
	name          string
	tcp           bool
	pulsar        bool
	lograw        bool

	Mode string

	// rootCmd represents the base command when called without any subcommands
	rootCmd = &cobra.Command{
		Use:   "tele-recv",
		Short: "telegram receiver",
		Long: `A serial port telegram receiver.
Read the telegram from serial port`,
	}

	appCfg *config.Config
	logger *zap.Logger
)

// Execute adds all child commands to the root command and sets flags appropriately.
// This is called by main.main(). It only needs to happen once to the rootCmd.
func Execute() {
	if err := rootCmd.Execute(); err != nil {
		fmt.Println(err)
		os.Exit(1)
	}
}

func init() {
	cobra.OnInitialize(initConfig)

	rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (telegram.yaml)")
	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")

	initLog()
	utils.Log = logger
}

// initConfig reads in config file and ENV variables if set.
func initConfig() {
	cfg, err := config.Load(cfgFile)
	if err != nil {
		logger.Warn("config load error, using defaults", zap.Error(err))
		return
	}
	appCfg = cfg

	// Populate legacy globals for backward compatibility
	device = cfg.Serial.Device
	baudrate = cfg.Serial.Baudrate
	lograw = cfg.Serial.LogRaw
	dbFile = cfg.SQLite.File
	dbInit = cfg.SQLite.Init
	socketAddress = cfg.Socket.Address
	pulsarUrl = cfg.Pulsar.URL
	topic = cfg.Pulsar.Topic
	name = cfg.Pulsar.Name
	tcp = cfg.Telegram.TCP
	pulsar = cfg.Telegram.Pulsar
	utils.Tcp = tcp
	utils.Pulsar = pulsar
}

func initLog() {
	logFile := "./logs/telegram-%Y-%m-%d-%H.log"
	rotator, err := rotatelogs.New(
		logFile,
		rotatelogs.WithMaxAge(60*24*time.Hour),
		rotatelogs.WithRotationTime(time.Hour))
	if err != nil {
		panic(err)
	}

	rawFile := "./logs/raw-%Y-%m-%d-%H.txt"
	utils.RawLog, err = rotatelogs.New(
		rawFile,
		rotatelogs.WithMaxAge(60*24*time.Hour),
		rotatelogs.WithRotationTime(time.Hour))
	if err != nil {
		panic(err)
	}

	filePriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.DebugLevel
	})

	stdoutPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.InfoLevel
	})

	encoder := zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())

	core := zapcore.NewTee(
		zapcore.NewCore(encoder, zapcore.Lock(os.Stdout), stdoutPriority),
		zapcore.NewCore(encoder, zapcore.AddSync(rotator), filePriority),
	)

	logger = zap.New(core)
}