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"
)

// renderGrantsIndex executes the real operator_grants.html template with the
// given data, mirroring renderOrgEnrollment (operator_enrollment_render_test.go)
// so the grants index and the org-detail composite are both exercised
// against their real templates rather than a stub.
func renderGrantsIndex(t *testing.T, data GrantsData) 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,
		"stripeEntityURL": func(string, string) string { return "" },
		"fieldErr": func(activeForm, expectedForm, activeScope, expectedScope string, errs web.FieldErrors, field 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_grants.html", data); err != nil {
		t.Fatalf("ExecuteTemplate: %v", err)
	}
	return buf.String()
}

// TestGrantsIndex_RendersDeliveryStateNotLedgerBadge covers
// ux-honest-surfaces UX-3: /operator/grants must render the derived
// delivery state (live/superseded/inactive), not the raw grants.status
// ledger as a green "active" badge under a bare "Status" header, and must
// carry the ledger-vs-delivery explanation and lineage.
func TestGrantsIndex_RendersDeliveryStateNotLedgerBadge(t *testing.T) {
	data := GrantsData{
		Grants: []GrantViewModel{
			{GrantID: "g-old", OrgName: "Acme Co", ProductName: "Legacy Plan", GrantReason: "manual", Status: "active", CreatedAt: "Jan 1, 2026", DeliveryState: "superseded", ReplacedByGrantID: "g-new", ReplacedByLabel: "Standard Plan"},
			{GrantID: "g-new", OrgName: "Acme Co", ProductName: "Standard Plan", GrantReason: "manual", Status: "active", CreatedAt: "Jan 2, 2026", DeliveryState: "live", ExtendsGrantID: "g-old", ExtendsLabel: "Legacy Plan"},
			{GrantID: "g-gone", OrgName: "Beta Org", ProductName: "Trial", GrantReason: "evaluation", Status: "revoked", CreatedAt: "Jan 3, 2026", DeliveryState: "inactive"},
		},
	}
	out := renderGrantsIndex(t, data)

	if !strings.Contains(out, "<th>Delivery</th>") {
		t.Errorf("expected a Delivery column header, got:\n%s", out)
	}
	if strings.Contains(out, "<th>Status</th>") {
		t.Errorf("a bare Status header must not render (UX-3): \n%s", out)
	}
	if !strings.Contains(out, ">Live<") || !strings.Contains(out, ">Superseded<") || !strings.Contains(out, ">Inactive<") {
		t.Errorf("expected all three delivery-state badges to render, got:\n%s", out)
	}
	if strings.Contains(out, `badge bg-success">active<`) || strings.Contains(out, `badge bg-danger">revoked<`) {
		t.Errorf("grants.status must not render as a colored state badge:\n%s", out)
	}
	if !strings.Contains(out, "replaced by Standard Plan") {
		t.Errorf("expected the superseded row's lineage (replaced by), got:\n%s", out)
	}
	if !strings.Contains(out, "extends Legacy Plan") {
		t.Errorf("expected the live row's lineage (extends), got:\n%s", out)
	}
	if !strings.Contains(out, "issuance ledger") {
		t.Errorf("expected the in-place ledger-vs-delivery explanation, got:\n%s", out)
	}
}

// TestGrantsIndex_EmptyState covers the genuinely-empty case still renders
// its own message rather than an empty table.
func TestGrantsIndex_EmptyState(t *testing.T) {
	out := renderGrantsIndex(t, GrantsData{})
	if !strings.Contains(out, "No grants found.") {
		t.Errorf("expected the empty-state message, got:\n%s", out)
	}
}