package config

import (
  "flag"
  "log"
  "os"
  "encoding/json"
)

type VideoOpts struct {
  Format string
  Scale string
  Resize bool
  VideoBitrate int
  VideoCodec string
  AudioBitrate int
  AudioCodec string
  Preset string
  CleanFilename bool
  Dash bool
  CRF int
  FPS int
  Tune string
  Input string
  OutDir string
  Test int
  TestStart int
  Passes int
  Extras []string
}

type Settings struct {
  Debug int
  Force bool
  Serve string
  Port string
  ConfigPath string
  Encodings []VideoOpts
}

func ParseFlags(c *Settings) {
  flag.IntVar(&c.Debug, "debug", 0, "1=print the ffmpeg command, 2=and its stderr output")
  flag.BoolVar(&c.Force, "force", false,  "Force the render even if the file exists.")
  flag.StringVar(&c.ConfigPath, "config", "config.json",  "config.json to load")
  flag.StringVar(&c.Serve, "serve", "", "serve a directory webserver")
  flag.StringVar(&c.Port, "port", ":8099",  "start a simple HTTP server for testing")

  flag.Parse()
}

func Load() Settings {
  var config Settings

  ParseFlags(&config)

  data, err := os.ReadFile(config.ConfigPath)
  if err != nil {
    log.Fatalf("error reading config %s: %v", config.ConfigPath, err);
  }

  err = json.Unmarshal(data, &config.Encodings)
  if err != nil {
    log.Fatalf("error loading %s: %v", config.ConfigPath, err)
  }

  return config
}