// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Commercial
// SPDX-FileCopyrightText: 2025-2026 Christian Galo

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 ""
		},
		"helpIcon": helpIcon,
	})
	tmpl, err = web.ParseUIPartials(template.Must(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// delivery state (live/superseded/inactive), not the raw grants.status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Co", ProductName: "Legacy Plan", GrantReason: "manual", Status: "active", CreatedAt: "Jan 1, 2026", DeliveryState: "superseded", ReplacedByGrantID: "g-new", ReplacedByLabel: "Standard Plan"},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"},
			{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 ") {
		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("the live row must not carry an extends line, which only repeats its product (maintainer, 2026-09-05), got:\n%s", out)
	}
	if strings.Contains(out, "Issuance is what the record says happened to the grant.") {
		t.Errorf("the standing Issuance-vs-Delivery paragraph must be replaced by header help icons (design D23):\n%s", out)
	}
	if !strings.Contains(out, `data-bs-content="What the record says happened to the grant: active, revoked, or expired."`) {
		t.Errorf("expected the Issuance column header's help icon, got:\n%s", out)
	}
	if !strings.Contains(out, `data-bs-content="Whether the grant is delivering into the pool now."`) {
		t.Errorf("expected the Delivery column header's help icon, got:\n%s", out)
	}
	if strings.Contains(out, "<th>Ledger</th>") {
		t.Errorf("the 'Ledger' header must be renamed 'Issuance' (design D5):\n%s", out)
	}
	if !strings.Contains(out, "<th>Issuance ") || !strings.Contains(out, "<th>Granted by</th>") {
		t.Errorf("expected Issuance and Granted by column headers, got:\n%s", out)
	}
}

// TestGrantsIndex_OrganizationCellLinksToComposite covers design D5 /
// chrome-conventions row navigation: the grant's home is a section of the
// organization composite, not a page of its own, so the primary cell links
// to the organization's plan-grants-panel anchor.
func TestGrantsIndex_OrganizationCellLinksToComposite(t *testing.T) {
	out := renderGrantsIndex(t, GrantsData{
		Grants: []GrantViewModel{
			{GrantID: "g1", OrgID: "org-123", OrgName: "Acme Co", ProductName: "Pro", GrantReason: "manual", Status: "active", DeliveryState: "live", CreatedAt: "Jan 1, 2026"},
		},
	})
	if !strings.Contains(out, `<a href="/operator/organizations/org-123#plan-grants-panel">Acme Co</a>`) {
		t.Errorf("expected the organization cell to link to the composite's grants section, got:\n%s", out)
	}
}

// TestGrantsIndex_GrantedByColumn covers ACC-28 / plan-enrollment-administration's
// "A row names its grantor and reaches its home": an operator-issued grant
// names and links to the granting person, while a system-issued grant (no
// granting person recorded) renders the system marker instead.
func TestGrantsIndex_GrantedByColumn(t *testing.T) {
	out := renderGrantsIndex(t, GrantsData{
		Grants: []GrantViewModel{
			{GrantID: "g1", OrgID: "org-1", OrgName: "Acme Co", ProductName: "Pro", GrantReason: "manual", Status: "active", DeliveryState: "live", CreatedAt: "Jan 1, 2026", GrantedByPersonID: "p-1", GrantedByName: "Jamie Rivera"},
			{GrantID: "g2", OrgID: "org-1", OrgName: "Acme Co", ProductName: "Starter", GrantReason: "default", Status: "active", DeliveryState: "live", CreatedAt: "Jan 2, 2026"},
		},
	})
	if !strings.Contains(out, `<a href="/operator/persons/p-1">Jamie Rivera</a>`) {
		t.Errorf("expected the operator-issued grant to name and link its grantor, got:\n%s", out)
	}
	if !strings.Contains(out, `<em class="text-muted">System</em>`) {
		t.Errorf("expected the system-issued grant to render the system marker, got:\n%s", out)
	}
}

// TestGrantsIndex_NoteLine covers design D7: a grant's audit note renders as
// a muted line under its reason, and a grant with no note carries no such
// line.
func TestGrantsIndex_NoteLine(t *testing.T) {
	out := renderGrantsIndex(t, GrantsData{
		Grants: []GrantViewModel{
			{GrantID: "g-note", OrgName: "Acme Co", ProductName: "Pro", GrantReason: "manual", Note: "Comped for the pilot cohort.", Status: "active", DeliveryState: "live", CreatedAt: "Jan 1, 2026"},
			{GrantID: "g-bare", OrgName: "Acme Co", ProductName: "Starter", GrantReason: "default", Status: "active", DeliveryState: "live", CreatedAt: "Jan 2, 2026"},
		},
	})
	if !strings.Contains(out, `<td>manual<div class="text-muted small">Comped for the pilot cohort.</div></td>`) {
		t.Errorf("expected the noted grant's reason cell to carry the muted note line, got:\n%s", out)
	}
	if !strings.Contains(out, "<td>default</td>") {
		t.Errorf("expected the note-less grant's reason cell to carry no note line, got:\n%s", out)
	}
}

// TestGrantsIndex_EmptyState covers the genuinely-empty case still renders
// its own message rather than an empty table: blocked (warning alert) while
// no product is published, the plain empty state once one is.
func TestGrantsIndex_EmptyState(t *testing.T) {
	out := renderGrantsIndex(t, GrantsData{})
	if !strings.Contains(out, "no product has been published yet") {
		t.Errorf("expected the blocked empty state with zero products, got:\n%s", out)
	}
	out = renderGrantsIndex(t, GrantsData{Products: []ProductViewModel{{ProductID: "p1", Name: "Pro"}}})
	if !strings.Contains(out, "No grants issued yet.") {
		t.Errorf("expected the empty-state message, got:\n%s", out)
	}
}