package models_test

import (
	"testing"
	"time"

	"git.golem15.com/jakub/sm-bm-plugin/models"
)

func TestMaterialFingerprint(t *testing.T) {
	str := func(s string) *string { return &s }
	id := func(n uint) *uint { return &n }
	base := func() models.Material {
		return models.Material{
			ID: 7, CourseID: id(1), MeetingID: id(2), Title: "Definicje", Type: "notatka",
			Body: str("# Robertson\n"), Source: str("wykład"), URL: str("https://example.test/a"),
		}
	}
	tags := []string{"globalizacja", "teoria-2"}
	want := models.MaterialFingerprint(base(), tags)

	if got := models.MaterialFingerprint(base(), []string{"teoria-2", "globalizacja"}); got != want {
		t.Errorf("tag order changed the fingerprint: %s != %s", got, want)
	}

	changes := map[string]func(m *models.Material, tags *[]string){
		"title":     func(m *models.Material, _ *[]string) { m.Title = "Inne" },
		"type":      func(m *models.Material, _ *[]string) { m.Type = "link" },
		"body":      func(m *models.Material, _ *[]string) { m.Body = str("# Robertson\n\nwięcej\n") },
		"source":    func(m *models.Material, _ *[]string) { m.Source = str("seminarium") },
		"url":       func(m *models.Material, _ *[]string) { m.URL = str("https://example.test/b") },
		"course":    func(m *models.Material, _ *[]string) { m.CourseID = id(3) },
		"no course": func(m *models.Material, _ *[]string) { m.CourseID = nil },
		"meeting":   func(m *models.Material, _ *[]string) { m.MeetingID = id(4) },
		"tag":       func(_ *models.Material, tags *[]string) { *tags = append(*tags, "nowy") },
		"untag":     func(_ *models.Material, tags *[]string) { *tags = (*tags)[:1] },
	}
	for name, change := range changes {
		m, ts := base(), append([]string(nil), tags...)
		change(&m, &ts)
		if got := models.MaterialFingerprint(m, ts); got == want {
			t.Errorf("a %s change kept the fingerprint", name)
		}
	}

	empty, null := base(), base()
	empty.Body, empty.Source, empty.URL = str(""), str("  "), str("")
	null.Body, null.Source, null.URL = nil, nil, nil
	if models.MaterialFingerprint(empty, tags) != models.MaterialFingerprint(null, tags) {
		t.Error("blank and nil optional text give different fingerprints")
	}
	if models.MaterialFingerprint(base(), nil) != models.MaterialFingerprint(base(), []string{}) {
		t.Error("nil and empty tag lists give different fingerprints")
	}

	now := time.Now()
	other := base()
	other.ID, other.PublishedAt, other.IsPrivate, other.AuthorUserID = 8, &now, true, id(9)
	other.UpdatedAt, other.Revision = now, 5
	if got := models.MaterialFingerprint(other, tags); got != want {
		t.Errorf("published_at, is_private, author, id or revision changed the fingerprint: %s != %s", got, want)
	}
}