package web

import (
	"regexp"
	"strings"
	"testing"
)

// Dashboard layout fixes, 2026-10-08 (REPORT-dashboard-layout.md). A Go test cannot measure pixels; these pin the
// markup and the rules the layout stands on, and the screenshots (felhom.eu/documentation/audits/
// dashboard-layout-2026-10-08/) show the consequence.

// cssRule returns the body of the top-level rule whose selector line is exactly `selector {`.
func cssRule(t *testing.T, css, selector string) string {
	t.Helper()
	i := strings.Index(css, "\n"+selector+" {")
	if i < 0 {
		t.Fatalf("style.css has no top-level %q rule", selector)
	}
	body := css[i+len(selector)+3:]
	return body[:strings.IndexByte(body, '}')]
}

// The Apps card header. Before: the title row and every tag were siblings in ONE space-between flex row; with two
// or more tags (any installed app) the one-word name ran under them, and the logo was centred on the name block,
// so a card with an address carried it lower than one without.
//
// RED-PROOF (REPORT): against 05e12921's stacks.html and style.css this fails — no .stack-tags, a tag before it,
// no address title, and the header rule still `justify-content: space-between`.
func TestStackCardHeaderLayout(t *testing.T) {
	s := i18nTestServer(t)
	var full i18nCase
	for _, c := range i18nCases() {
		if c.name == "stacks_full" {
			full = c
		}
	}
	if full.name == "" {
		t.Fatal("no stacks_full parity case")
	}
	addrRe := regexp.MustCompile(`<a class="subdomain-link" href="https://([^"]+)" target="_blank" title="([^"]*)">\s*<span class="subdomain-text">([^<]*)</span> ↗\s*</a>`)
	for _, lang := range []string{"hu", "en"} {
		page := renderI18nCase(t, s, lang, full)
		cards := strings.Split(page, `<div class="stack-detail-header">`)[1:]
		if len(cards) != 8 {
			t.Fatalf("%s: %d card headers, want 8", lang, len(cards))
		}
		addresses := 0
		for i, c := range cards {
			head := c[:strings.Index(c, `<div class="metarows">`)]
			title := strings.Index(head, `<div class="stack-title-row">`)
			tags := strings.Index(head, `<div class="stack-tags">`)
			if title < 0 || tags < 0 || tags < title {
				t.Errorf("%s card %d: want the title row, then a .stack-tags row (title %d, tags %d)", lang, i, title, tags)
				continue
			}
			if first := strings.Index(head, `class="tag `); first < tags {
				t.Errorf("%s card %d: a tag outside the tags row (at %d, row at %d)", lang, i, first, tags)
			}
			if !strings.Contains(head[title:tags], `<div class="stack-title-text">`) {
				t.Errorf("%s card %d: the name block has no .stack-title-text (it carries min-width: 0)", lang, i)
			}
			if strings.Contains(head, "subdomain-link") {
				m := addrRe.FindStringSubmatch(head)
				if m == nil || m[1] != m[2] || m[2] != m[3] {
					t.Errorf("%s card %d: the address must be one ellipsis span with the full address in title: %q", lang, i, m)
				}
				addresses++
			}
		}
		if addresses != 2 {
			t.Errorf("%s: %d addresses, want 2 (filebrowser, privatebin)", lang, addresses)
		}
	}

	data, err := StyleCSS()
	if err != nil {
		t.Fatal(err)
	}
	css := string(data)
	if h := cssRule(t, css, ".stack-detail-header"); strings.Contains(h, "space-between") || !strings.Contains(h, "flex-direction: column") {
		t.Errorf(".stack-detail-header must stack the title row over the tags, not spread them on one row: %s", h)
	}
	if r := cssRule(t, css, ".stack-title-row"); !strings.Contains(r, "align-items: flex-start") {
		t.Errorf(".stack-title-row must align the logo to the top of the name: %s", r)
	}
	if r := cssRule(t, css, ".stack-title-text"); !strings.Contains(r, "min-width: 0") {
		t.Errorf(".stack-title-text needs min-width: 0, or a long address cannot shrink: %s", r)
	}
	if r := cssRule(t, css, ".stack-tags"); !strings.Contains(r, "flex-wrap: wrap") {
		t.Errorf(".stack-tags must wrap (English tags are longer): %s", r)
	}
	if r := cssRule(t, css, ".subdomain-text"); !strings.Contains(r, "text-overflow: ellipsis") || !strings.Contains(r, "overflow: hidden") {
		t.Errorf(".subdomain-text must cut a long address with an ellipsis: %s", r)
	}
	if r := cssRule(t, css, ".subdomain-link"); !strings.Contains(r, "white-space: nowrap") {
		t.Errorf(".subdomain-link must keep the arrow on the address line: %s", r)
	}
}

// R-907 — on a phone the launcher's title, domain chip and share button sat on one row that does not wrap; the
// button ran off the right edge (390 px, demo-hp 9201, 2026-10-08).
//
// RED-PROOF (REPORT): against 05e12921's style.css this fails — the 768px block has no .page-header rule.
func TestR907_PageHeaderWrapsOnAPhone(t *testing.T) {
	data, err := StyleCSS()
	if err != nil {
		t.Fatal(err)
	}
	block := mediaBlock768(t, string(data))
	if !regexp.MustCompile(`\.page-header \{[^}]*flex-wrap: wrap`).MatchString(block) {
		t.Error("the phone block must let .page-header wrap")
	}
	if !regexp.MustCompile(`\.share-open-btn \{[^}]*white-space: nowrap`).MatchString(block) {
		t.Error("the share button's text must stay whole when it drops to its own line")
	}
	// The button is still in the header it wraps inside, in both languages.
	s := i18nTestServer(t)
	for _, c := range i18nCases() {
		if c.name != "launcher_full" {
			continue
		}
		for _, lang := range []string{"hu", "en"} {
			page := renderI18nCase(t, s, lang, c)
			i := strings.Index(page, `<div class="page-header">`)
			if i < 0 {
				t.Fatalf("%s: launcher has no .page-header", lang)
			}
			head := page[i : i+strings.Index(page[i:], "</div>")]
			if !strings.Contains(head, "share-open-btn") {
				t.Errorf("%s: the share button left the launcher header", lang)
			}
		}
		return
	}
	t.Fatal("no launcher_full parity case")
}