package scanner

import (
	"fmt"
	"reflect"
	"testing"
	"time"
)

var testdata = []struct {
	name string
	size int
	hash string
}{
	{"bar", 10, "2f72cc11a6fcd0271ecef8c61056ee1eb1243be3805bf9a9df98f92f7636b05c"},
	{"empty", 0, "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"},
	{"foo", 7, "aec070645fe53ee3b3763059376134f058cc337247c978add178b6ccdfb0019f"},
}

var correctIgnores = map[string][]string{
	"": {".*", "quux"},
}

func TestWalk(t *testing.T) {
	w := Walker{
		Dir:        "testdata",
		BlockSize:  128 * 1024,
		IgnoreFile: ".stignore",
	}
	files, ignores := w.Walk()

	if l1, l2 := len(files), len(testdata); l1 != l2 {
		t.Fatalf("Incorrect number of walked files %d != %d", l1, l2)
	}

	for i := range testdata {
		if n1, n2 := testdata[i].name, files[i].Name; n1 != n2 {
			t.Errorf("Incorrect file name %q != %q for case #%d", n1, n2, i)
		}

		if h1, h2 := fmt.Sprintf("%x", files[i].Blocks[0].Hash), testdata[i].hash; h1 != h2 {
			t.Errorf("Incorrect hash %q != %q for case #%d", h1, h2, i)
		}

		t0 := time.Date(2010, 1, 1, 0, 0, 0, 0, time.UTC).Unix()
		t1 := time.Date(2020, 1, 1, 0, 0, 0, 0, time.UTC).Unix()
		if mt := files[i].Modified; mt < t0 || mt > t1 {
			t.Errorf("Unrealistic modtime %d for test %d", mt, i)
		}
	}

	if !reflect.DeepEqual(ignores, correctIgnores) {
		t.Errorf("Incorrect ignores\n  %v\n  %v", correctIgnores, ignores)
	}
}

func TestIgnore(t *testing.T) {
	var patterns = map[string][]string{
		"":        {"t2"},
		"foo":     {"bar", "z*"},
		"foo/baz": {"quux", ".*"},
	}
	var tests = []struct {
		f string
		r bool
	}{
		{"foo/bar", true},
		{"foo/quux", false},
		{"foo/zuux", true},
		{"foo/qzuux", false},
		{"foo/baz/t1", false},
		{"foo/baz/t2", true},
		{"foo/baz/bar", true},
		{"foo/baz/quuxa", false},
		{"foo/baz/aquux", false},
		{"foo/baz/.quux", true},
		{"foo/baz/zquux", true},
		{"foo/baz/quux", true},
		{"foo/bazz/quux", false},
	}

	w := Walker{}
	for i, tc := range tests {
		if r := w.ignoreFile(patterns, tc.f); r != tc.r {
			t.Errorf("Incorrect ignoreFile() #%d; E: %v, A: %v", i, tc.r, r)
		}
	}
}