package api

import (
	"io/ioutil"
	"os"
	"path"
	"runtime"
	"testing"
)

var (
	testDir         string
	testDownloadDir string
)

func init() {
	_, filename, _, _ := runtime.Caller(1)
	testDir = path.Join(path.Dir(filename), "../test")
	testDownloadDir, _ = ioutil.TempDir(os.TempDir(), "bzz-test")
}

func testFileSystem(t *testing.T, f func(*FileSystem)) {
	testApi(t, func(api *Api) {
		f(NewFileSystem(api))
	})
}

func readPath(t *testing.T, parts ...string) string {
	// func readPath(t *testing.T, parts ...string) []byte {
	file := path.Join(parts...)
	content, err := ioutil.ReadFile(file)
	if err != nil {
		t.Fatalf("unexpected error reading '%v': %v", file, err)
	}
	return string(content)
}

func TestApiDirUpload0(t *testing.T) {
	// t.Skip("FIXME")
	testFileSystem(t, func(fs *FileSystem) {
		api := fs.api
		bzzhash, err := fs.Upload(path.Join(testDir, "test0"), "")
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}

		content := readPath(t, testDir, "test0", "index.html")
		resp := testGet(t, api, bzzhash+"/index.html")
		exp := expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)

		content = readPath(t, testDir, "test0", "index.css")
		resp = testGet(t, api, bzzhash+"/index.css")
		exp = expResponse(content, "text/css", 0)
		checkResponse(t, resp, exp)

		content = readPath(t, testDir, "test0", "img", "logo.png")
		resp = testGet(t, api, bzzhash+"/img/logo.png")
		exp = expResponse(content, "image/png", 0)

		_, _, _, err = api.Get(bzzhash)
		if err == nil {
			t.Fatalf("expected error: %v", err)
		}

		downloadDir := path.Join(testDownloadDir, "test0")
		os.RemoveAll(downloadDir)
		defer os.RemoveAll(downloadDir)
		err = fs.Download(bzzhash, downloadDir)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		newbzzhash, err := fs.Upload(downloadDir, "")
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if bzzhash != newbzzhash {
			t.Fatalf("download %v reuploaded has incorrect hash, expected %v, got %v", downloadDir, bzzhash, newbzzhash)
		}

	})
}

func TestApiDirUploadModify(t *testing.T) {
	// t.Skip("FIXME")
	testFileSystem(t, func(fs *FileSystem) {
		api := fs.api
		bzzhash, err := fs.Upload(path.Join(testDir, "test0"), "")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}

		bzzhash, err = api.Modify(bzzhash, "index.html", "", "")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}
		bzzhash, err = api.Modify(bzzhash, "index2.html", "9ea1f60ebd80786d6005f6b256376bdb494a82496cd86fe8c307cdfb23c99e71", "text/html; charset=utf-8")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}
		bzzhash, err = api.Modify(bzzhash, "img/logo.png", "9ea1f60ebd80786d6005f6b256376bdb494a82496cd86fe8c307cdfb23c99e71", "text/html; charset=utf-8")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}

		content := readPath(t, testDir, "test0", "index.html")
		resp := testGet(t, api, bzzhash+"/index2.html")
		exp := expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)

		resp = testGet(t, api, bzzhash+"/img/logo.png")
		exp = expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)

		content = readPath(t, testDir, "test0", "index.css")
		resp = testGet(t, api, bzzhash+"/index.css")
		exp = expResponse(content, "text/css", 0)

		_, _, _, err = api.Get(bzzhash)
		if err == nil {
			t.Errorf("expected error: %v", err)
		}
	})
}

func TestApiDirUploadWithRootFile(t *testing.T) {
	testFileSystem(t, func(fs *FileSystem) {
		api := fs.api
		bzzhash, err := fs.Upload(path.Join(testDir, "test0"), "index.html")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}

		content := readPath(t, testDir, "test0", "index.html")
		resp := testGet(t, api, bzzhash)
		exp := expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)
	})
}

func TestApiFileUpload(t *testing.T) {
	testFileSystem(t, func(fs *FileSystem) {
		api := fs.api
		bzzhash, err := fs.Upload(path.Join(testDir, "test0", "index.html"), "")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}

		content := readPath(t, testDir, "test0", "index.html")
		resp := testGet(t, api, bzzhash+"/index.html")
		exp := expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)
	})
}

func TestApiFileUploadWithRootFile(t *testing.T) {
	testFileSystem(t, func(fs *FileSystem) {
		api := fs.api
		bzzhash, err := fs.Upload(path.Join(testDir, "test0", "index.html"), "index.html")
		if err != nil {
			t.Errorf("unexpected error: %v", err)
			return
		}

		content := readPath(t, testDir, "test0", "index.html")
		resp := testGet(t, api, bzzhash)
		exp := expResponse(content, "text/html; charset=utf-8", 0)
		checkResponse(t, resp, exp)
	})
}