package liber

import (
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"git.autistici.org/ale/liber/util"
)

func createTestFs(fs map[string]string) string {
	base, _ := ioutil.TempDir("", "test-fs-")
	for path, contents := range fs {
		path = filepath.Join(base, path)
		os.MkdirAll(filepath.Dir(path), 0700)
		ioutil.WriteFile(path, []byte(contents), 0700)
	}
	return base
}

func checkDbPathIntegrity(t *testing.T, db *Database) {
	// Files should have relative paths.
	for i := db.Scan(FileBucket); i.Valid(); i.Next() {
		var f File
		if err := i.Value(&f); err != nil {
			t.Fatal(err)
		}
		if strings.HasPrefix(f.Path, "/") {
			t.Errorf("file has absolute path: %v", f.Path)
		}
	}

	// Book cover images should have relative paths.
	for i := db.Scan(BookBucket); i.Valid(); i.Next() {
		var b Book
		if err := i.Value(&b); err != nil {
			t.Fatal(err)
		}
		if b.CoverPath != "" && strings.HasPrefix(b.CoverPath, "/") {
			t.Errorf("file has absolute path: %v", b.CoverPath)
		}
	}
}

func TestDatabase_Update(t *testing.T) {
	util.WalkerDefaultMinSize = 0

	td, db := newTestDatabase(t)
	defer td.Close()

	// Make the test book a pdf so we don't attempt to parse it.
	tmpdir := createTestFs(map[string]string{
		"book/Test Ebook.pdf": "foo",
		"book/metadata.opf":   testOpf,
		"book/cover.jpg":      "jpeg",
	})
	defer os.RemoveAll(tmpdir)

	chooserCalled := false
	chooser := func(path string, choices []*Metadata) *Metadata {
		chooserCalled = true
		return nil
	}

	testDb := func(tag string) {
		// The test ebook added in newTestDatabase should not be there
		// any more.
		if _, err := db.GetBook(td.refbookid); err == nil {
			t.Errorf("%s: test book still in database", tag)
		}

		// Test OPF ebook should have been found by Update.
		if result, err := db.Search("isbn:9781939293015", 0, 1); err != nil || result.NumResults != 1 {
			t.Errorf("%s: new book not found in database", tag)
		}
	}

	// The second update should do nothing.
	db.Update(tmpdir, chooser)
	testDb("first update")
	db.Update(tmpdir, chooser)
	testDb("second update")

	if chooserCalled {
		t.Errorf("chooser function was called")
	}

	// Check that the test file is there.
	if _, err := db.GetFile("book/Test Ebook.pdf"); err != nil {
		t.Errorf("test file is not in the database")
	}

	checkDbPathIntegrity(t, db)
}

func TestDatabase_UpdateEpub(t *testing.T) {
	util.WalkerDefaultMinSize = 0

	td, db := newTestDatabase(t)
	defer td.Close()

	// Read the test epub from testdata/.
	db.Update("testdata", nil)

	checkDbPathIntegrity(t, db)
}