package journal_test

import (
	"encoding/json"
	"net/http"
	"strings"
	"testing"

	"git.golem15.com/golem15/sm-journal-plugin/controllers"
	"git.golem15.com/golem15/sm-journal-plugin/models"
)

const journalAPIPrefix = "/_journal/api/v1"

// setH1ToH2 switches the Journal H1 setting on the settings row.
func setH1ToH2(t *testing.T, env *adminEnv, on bool) {
	t.Helper()
	if err := env.gdb.Exec(`UPDATE golem15_journal_settings SET content_h1_to_h2 = ? WHERE id = 1`, on).Error; err != nil {
		t.Fatal(err)
	}
}

// publishPost publishes a post with a past published_at.
func publishPost(t *testing.T, env *adminEnv, id uint) {
	t.Helper()
	if err := env.gdb.Exec(`UPDATE golem15_journal_posts SET published = TRUE, published_at = NOW() - INTERVAL '1 hour' WHERE id = ?`, id).Error; err != nil {
		t.Fatal(err)
	}
}

// showH1Flag is GET /_journal/api/v1/posts/{slug}'s content_h1_to_h2.
func showH1Flag(t *testing.T, env *adminEnv, slug string) any {
	t.Helper()
	rec := env.expect(t, http.StatusOK, http.MethodGet, journalAPIPrefix+"/posts/"+slug, "", nil)
	var body struct {
		Data map[string]any `json:"data"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
		t.Fatalf("show body %s: %v", rec.Body.String(), err)
	}
	flag, ok := body.Data["content_h1_to_h2"]
	if !ok {
		t.Fatalf("show answer has no content_h1_to_h2: %s", rec.Body.String())
	}
	return flag
}

// TestHeadingConversionTracer is the 33-02 tracer: an editor saves a post
// whose content holds an H1 through the admin and gets an H2 back with the
// h1_converted notice, and the public post answer reports the setting.
// With the setting off the same save keeps the H1, adds no notice, and the
// answer reports false.
func TestHeadingConversionTracer(t *testing.T) {
	env := newPostsEnv(t)
	token := env.admin(t,
		controllers.PermissionAccessPosts,
		controllers.PermissionAccessPublish,
		controllers.PermissionAccessOtherPosts,
	)
	const submitted = "<h1>A</h1><p>x</p>"

	save := func(t *testing.T, slug string) (uint, []adminNotice) {
		t.Helper()
		rec := env.expect(t, http.StatusCreated, http.MethodPost, adminAPI(adminPostsPath), token, map[string]any{
			"title":   map[string]any{"en": "Heading " + slug, "pl": "Nagłówek " + slug},
			"slug":    map[string]any{"en": slug, "pl": slug + "-pl"},
			"content": map[string]any{"en": submitted, "pl": submitted},
		})
		return adminCreatedID(t, rec), adminNotices(t, rec)
	}

	t.Run("setting on", func(t *testing.T) {
		setH1ToH2(t, env, true)
		id, notices := save(t, "heading-on")
		assertHostContent(t, env, id, "on", "<h2>A</h2><p>x</p>", "<h2>A</h2><p>x</p>")
		pl := translatedAttrs(t, env, id, "pl")
		if pl["content"] != "<h2>A</h2><p>x</p>" || pl["content_html"] != "<h2>A</h2><p>x</p>" {
			t.Fatalf("pl content = %#v, content_html = %#v, want the H2", pl["content"], pl["content_html"])
		}
		for _, locale := range []string{"en", "pl"} {
			found := false
			for _, n := range notices {
				if n.Field == "content" && n.Locale == locale &&
					n.Message == "1 H1 heading was converted to H2, because the page shows the post title as the H1." {
					found = true
				}
			}
			if !found {
				t.Fatalf("%s notices = %#v, want the h1_converted phrase with count 1", locale, notices)
			}
		}
		publishPost(t, env, id)
		if flag := showH1Flag(t, env, "heading-on"); flag != true {
			t.Fatalf("content_h1_to_h2 = %#v, want true", flag)
		}
	})

	t.Run("setting off", func(t *testing.T) {
		setH1ToH2(t, env, false)
		t.Cleanup(func() { setH1ToH2(t, env, true) })
		id, notices := save(t, "heading-off")
		assertHostContent(t, env, id, "off", submitted, submitted)
		for _, n := range notices {
			if strings.Contains(n.Message, "H1") {
				t.Fatalf("setting off: notice %#v", n)
			}
		}
		if notices != nil {
			t.Fatalf("setting off: clean save carries meta.notices %#v", notices)
		}
		publishPost(t, env, id)
		if flag := showH1Flag(t, env, "heading-off"); flag != false {
			t.Fatalf("content_h1_to_h2 = %#v, want false", flag)
		}
		// D-50: switching the setting never rewrites stored content.
		setH1ToH2(t, env, true)
		var stored models.Post
		if err := env.gdb.First(&stored, id).Error; err != nil {
			t.Fatal(err)
		}
		if stored.Content != submitted || stored.ContentHTML != submitted {
			t.Fatalf("switching the setting on rewrote content: %q / %q", stored.Content, stored.ContentHTML)
		}
	})
}