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

package client

import (
	"github.com/stretchr/testify/assert"
	"os"
	"os/user"
	"os/exec"
	"testing"
	"decl/internal/tempdir"
	"log"
	"decl/internal/folio"
_	"decl/internal/fan"
	"decl/internal/codec"
	"decl/internal/data"
	"context"
	"fmt"
	"log/slog"
)

var programLevel = new(slog.LevelVar)

var TempDir tempdir.Path = "jx_client"

var ProcessTestUserName string
var ProcessTestGroupName string

func TestMain(m *testing.M) {
	LoggerConfig()
	var err error
	err = TempDir.Create()
	if err != nil || TempDir == "" {
		log.Fatal(err)
	}

	ProcessTestUserName, ProcessTestGroupName = ProcessUserName()
	rc := m.Run()

	TempDir.Remove()
	os.Exit(rc)
}

func LoggerConfig() {
	logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{Level: programLevel}))
	slog.SetDefault(logger)
	programLevel.Set(slog.LevelDebug)
}

func ProcessUserName() (string, string) {
	processUser, userErr := user.Current()
	if userErr != nil {
		panic(userErr)
	}
	processGroup, groupErr := user.LookupGroupId(processUser.Gid)
	if groupErr != nil {
		panic(groupErr)
	}
	return processUser.Username, processGroup.Name
}

func ExitError(e error) string {
	if e != nil {
		switch v := e.(type) {
		case *exec.ExitError:
			return string(v.Stderr)
		default:
			return e.Error()
		}
	}
	return ""
}

// jx import <docuri>...
func TestClientImport(t *testing.T) {
	c := NewClient()
	assert.NotNil(t, c)

	importDocuments := []string{
		"file://../../examples/file.jx.yaml",
		"file://../../examples/user.jx.yaml",
	}

	assert.Nil(t, c.Import(importDocuments))

	for index, uri := range importDocuments {
		u := folio.URI(uri)
		r, readerErr := u.ContentReaderStream()
		assert.Nil(t, readerErr)
		assert.NotNil(t, r)

		doc := folio.DocumentRegistry.NewDocument(folio.URI(uri))
		assert.Nil(t, doc.LoadReader(r, codec.FormatYaml))

		imported := c.Documents[index]
		assert.NotNil(t, imported)
		assert.Equal(t, uri, imported.GetURI())
		assert.Equal(t, doc.Len(), imported.Len())
	}
}

// jx import --resource <resource>
func TestClientImportResource(t *testing.T) {
	ctx := context.Background()
	c := NewClient()
	assert.NotNil(t, c)

	importResources := []string{
		"file://../../COPYRIGHT",
	}

	for _, uri := range importResources {
		assert.Nil(t, c.ImportResource(ctx, uri))
	}

	imported := c.Documents[0]
	assert.NotNil(t, imported)
	for _, uri := range importResources {
		assert.NotNil(t, imported.(*folio.Document).GetResource(uri))
	}
}

func TestClientEmit(t *testing.T) {
	//ctx := context.Background()
	c := NewClient()
	assert.NotNil(t, c)

	importDocuments := []string{
		"file://../../examples/file.jx.yaml",
		"file://../../examples/user.jx.yaml",
	}

	assert.Nil(t, c.Import(importDocuments))
	targetFile := TempDir.FilePath("jx_emit_output.jx.yaml")
	targetFileURI := fmt.Sprintf("file://%s", targetFile)
	assert.Nil(t, c.SetOutput(targetFile))
	assert.Nil(t, c.Emit())

	assert.FileExists(t, targetFile)


	u := folio.URI(targetFileURI)
	r, readerErr := u.ContentReaderStream()
	assert.Nil(t, readerErr)
	assert.NotNil(t, r)

	extractor, err := folio.DocumentRegistry.ConverterTypes.New(targetFileURI)
	assert.Nil(t, err)
	assert.NotNil(t, extractor)

	targetResource, resErr := u.NewResource(nil)
	assert.Nil(t, resErr)
	docs, exErr := extractor.(data.ManyExtractor).ExtractMany(targetResource, nil)
	assert.Nil(t, exErr)

	assert.Equal(t, 2, len(docs))

	assert.Equal(t, 1, docs[1].Len())
}

func BenchmarkClientSystemConfigurations(b *testing.B) {
	assert.Nil(b, TempDir.Mkdir("benchconfig", 0700))
	ConfDir := tempdir.Path(TempDir.FilePath("benchconfig"))
	ConfDir.CreateFile("cfg.jx.yaml", `
configurations:
- name: files
  values:
    prefix: /usr
`)
	
	configDirURI := fmt.Sprintf("file://%s", ConfDir)
	
	programLevel.Set(slog.LevelError)
	b.Run("systemconfiguration", func(b *testing.B) {
		for i := 0; i < b.N; i++ {
			c := NewClient()
			c.SystemConfiguration(configDirURI)
		}
	})
	programLevel.Set(slog.LevelDebug)
}

func TestClientSystemConfiguration(t *testing.T) {
	c := NewClient()
	assert.NotNil(t, c)

	assert.Nil(t, TempDir.Mkdir("config", 0700))

	ConfDir := tempdir.Path(TempDir.FilePath("config"))
	ConfDir.CreateFile("cfg.jx.yaml", `
configurations:
- name: files
  values:
    prefix: /usr
`)
	
	//configDirURI := fmt.Sprintf("file://%s", ConfDir)
	configErr := c.SystemConfiguration(string(ConfDir))
	assert.Nil(t, configErr)

	assert.NotNil(t, c.Config)

	slog.Info("TestClientSystemConfiguration", "config", c.Config)
	cfg := c.Config.GetConfig("files")
	assert.NotNil(t, cfg)

	value, valueErr := cfg.GetValue("prefix")
	assert.Nil(t, valueErr)
	assert.Equal(t, "/usr", value.(string))
	return
}