// Copyright 2024 Matthew Rich <matthewrich.conf@gmail.com>. All rights reserved.
package main

import (
  "os"
  "flag"
  "log"
	"log/slog"
	"fmt"
_ "gopkg.in/yaml.v3"
  "decl/internal/resource"
)


func main() {
	fmt.Print("debugging\n")
  var programLevel = new(slog.LevelVar)
  logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel}))
  slog.SetDefault(logger)
  if debugLogging,ok := os.LookupEnv("DECL_DEBUG"); ok && debugLogging != "" {
    programLevel.Set(slog.LevelDebug)
  } else {
    programLevel.Set(slog.LevelError)
  }

	fmt.Print("debugging: flags\n")
  file := flag.String("resource-file", "", "Resource file path")
  resourceUri := flag.String("import-resource", "", "Add an existing resource")
  
  flag.Parse()

  var resourceFile *os.File
  var inputFileErr error

	slog.Info("args", "resource-file", *file, "import-resource", *resourceUri)
  if *file == "-" {
    if stdinInfo, stdinErr := os.Stdin.Stat(); stdinErr == nil {
      if (stdinInfo.Mode() & os.ModeCharDevice) == 0 {
        resourceFile = os.Stdin
      }
    } else {
      inputFileErr = stdinErr
    }
	} else if *file != "" {
    resourceFile,inputFileErr = os.Open(*file)
  }

  if inputFileErr != nil {
    log.Fatal(inputFileErr)
  }

  d := resource.NewDocument()
	slog.Info("loading resource document", "file", resourceFile)
	if *file != "" {
	  if e := d.Load(resourceFile); e != nil {
			log.Fatal(e)
		}
		if validationErr := d.Validate(); validationErr != nil {
			log.Fatal(validationErr)
		}
		if applyErr := d.Apply(); applyErr != nil {
			log.Fatal(applyErr)
		}
	}
  if *resourceUri != "" {
		slog.Info("importing resource", "resource", *resourceUri)
    if addResourceErr := d.AddResource(*resourceUri); addResourceErr != nil {
			log.Fatal(addResourceErr)
		}
  }

  if documentGenerateErr := d.Generate(os.Stdout); documentGenerateErr != nil {
		log.Fatal(documentGenerateErr)
	}
}