package server

import (
	"bytes"
	"html/template"
	"io/fs"
	"strings"
	"testing"

	"git.coopcloud.tech/wiki-cafe/member-console/internal/embeds"
	"git.coopcloud.tech/wiki-cafe/member-console/internal/web"
)

func renderPlanLaddersPageBody(t *testing.T, data PlanLaddersData) string {
	t.Helper()
	partialsSub, err := fs.Sub(embeds.Templates, "templates/partials")
	if err != nil {
		t.Fatalf("fs.Sub partials: %v", err)
	}
	tmpl := template.New("operator").Funcs(template.FuncMap{
		"renderBody": func(string, any) (template.HTML, error) { return "", nil },
		"routeURL":   web.RouteURL,
		"fieldErr": func(activeForm, expectedForm, activeScope, expectedScope string, errs web.FieldErrors, field string) string {
			return ""
		},
		"stripeEntityURL": func(string, string) string { return "" },
	})
	tmpl, err = tmpl.ParseFS(partialsSub, "operator_*.html")
	if err != nil {
		t.Fatalf("ParseFS: %v", err)
	}
	var buf bytes.Buffer
	if err := tmpl.ExecuteTemplate(&buf, "operator_plan_ladders.html", data); err != nil {
		t.Fatalf("ExecuteTemplate: %v", err)
	}
	return buf.String()
}

// TestCreatePlanLadderSlugDisclosure covers UX-10 (ux-honest-surfaces 5.2):
// the Create Plan Ladder form must disclose slug immutability at the field
// itself, not only on the edit page reached after the value is already
// fixed.
func TestCreatePlanLadderSlugDisclosure(t *testing.T) {
	body := renderPlanLaddersPageBody(t, PlanLaddersData{})
	if !strings.Contains(body, "Slug cannot be changed after creation.") {
		t.Errorf("expected the create form's slug field to disclose immutability, got: %s", body)
	}
}

// TestPlanLaddersListDeleteConsequenceCopy covers UX-10 (ux-honest-surfaces
// 5.3): a ladder row with active attachments must state inline, beside the
// Delete control, that deletion is blocked while organizations are attached
// -- visible on the list itself, before any confirm dialog opens -- while a
// ladder with no active attachments carries no such claim.
func TestPlanLaddersListDeleteConsequenceCopy(t *testing.T) {
	body := renderPlanLaddersPageBody(t, PlanLaddersData{
		Ladders: []PlanLadderViewModel{
			{PlanLadderID: "l-occupied", LadderKey: "hosting", Name: "Hosting", ActiveAttachmentCount: 4},
			{PlanLadderID: "l-empty", LadderKey: "legacy", Name: "Legacy", ActiveAttachmentCount: 0},
		},
	})

	if !strings.Contains(body, "4 organization(s) attached; deletion is blocked until they're detached.") {
		t.Errorf("expected inline consequence copy beside the occupied ladder's Delete control, got: %s", body)
	}

	emptyIdx := strings.Index(body, "l-empty")
	if emptyIdx == -1 {
		t.Fatal("expected the empty ladder row to render")
	}
	if strings.Contains(body[emptyIdx:], "organization(s) attached") {
		t.Errorf("ladder with no active attachments must not render the live-use consequence copy")
	}
}