package dataswamp

import (
	"time"
	"bytes"
	"testing"
	"github.com/matryer/is"
	"caj-larsson/bog/dataswamp/swampfile"
	"caj-larsson/bog/dataswamp/namespace"
	m_namespace "caj-larsson/bog/infrastructure/memory/namespace"
	m_swampfile "caj-larsson/bog/infrastructure/memory/swampfile"
)

var file_ref1 = swampfile.FileReference { "ptah1", "ua1" }
var file_ref2 = swampfile.FileReference { "path1", "ua2" }
var file_ref3 = swampfile.FileReference { "path2", "ua1" }


func NewTestSwampFileService() SwampFileService {
	file_repo := m_swampfile.NewRepository()
	ns_repo := m_namespace.NewRepository()
	return NewSwampFileService(ns_repo, file_repo, 1024, time.Hour)
}

func TestFileDontExist(t *testing.T) {
	s := NewTestSwampFileService()
	outfile, err := s.OpenOutFile(file_ref1)

	if outfile != nil && err != swampfile.ErrNotExists {
		t.Errorf("File shall not exist by default")
	}
}

func TestFileIsStored(t *testing.T) {
	s := NewTestSwampFileService()

	fakefile := bytes.NewBufferString("My bog data")

	err := s.SaveFile(file_ref1, fakefile, int64(fakefile.Len()))

	if err != nil {
		t.Errorf("A small file should be writable %s", err)
	}

	largefakefile := bytes.NewBufferString("")

	for largefakefile.Len() < 64000 {
		_, err = largefakefile.WriteString("A very repetitive file")
	}

	err = s.SaveFile(file_ref3, largefakefile, int64(largefakefile.Len()))

	if err != namespace.ErrExceedQuota {
		t.Errorf("too large files should not be excepted")
	}

}


func TestFileIsReadBack(t *testing.T) {
	s := NewTestSwampFileService()

	infile := bytes.NewBufferString("My bog data")

	_ = s.SaveFile(file_ref1, infile, int64(infile.Len()))

	outswampfile, _ := s.OpenOutFile(file_ref1)

	outfile := bytes.NewBufferString("")
	_, _ = outfile.ReadFrom(outswampfile)

	if outfile.String() != "My bog data" {
		t.Errorf("file corrupted")
	}
}


func TestUAIsolation(t *testing.T) {
	s := NewTestSwampFileService()

	ns1_file := bytes.NewBufferString("My bog data ua1")
	ns2_file := bytes.NewBufferString("My bog data ua2")

	_ = s.SaveFile(file_ref1, ns1_file, int64(ns1_file.Len()))
	_ = s.SaveFile(file_ref2, ns2_file, int64(ns2_file.Len()))

	outswampfile, _ := s.OpenOutFile(file_ref1)

	outfile := bytes.NewBufferString("")
	_, _ = outfile.ReadFrom(outswampfile)

	if outfile.String() != "My bog data ua1" {
		t.Errorf("file corrupted")
	}
}


func TestCleanPath(t *testing.T) {
	is := is.New(t)

	is.Equal(CleanPath("/"), "/")
}