package server

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

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

// TestOperatorTemplateRendersBothBranches parses operator.html and renders
// both dispatch branches (curated landing surface and the MPA BodyTemplate
// dispatch) to catch Go-template syntax errors that would otherwise only
// surface at request time. The legacy tabstrip branch was retired in slice
// 8 of operator-mpa-conversion §5.
func TestOperatorTemplateRendersBothBranches(t *testing.T) {
	sub, err := fs.Sub(embeds.Templates, "templates")
	if err != nil {
		t.Fatalf("fs.Sub: %v", err)
	}
	partialsSub, err := fs.Sub(embeds.Templates, "templates/partials")
	if err != nil {
		t.Fatalf("fs.Sub partials: %v", err)
	}
	// operator.html references the `renderBody` and `routeURL` template
	// funcs and includes partials like operator_lookup_result.html via
	// `{{ template "..." . }}`. Mirror NewOperatorPartialsHandler: load
	// partials first, then the shell.
	tmpl := template.New("operator").Funcs(template.FuncMap{
		"renderBody":      func(string, any) (template.HTML, error) { return "", nil },
		"routeURL":        web.RouteURL,
		"fieldErr":        func(_, _, _, _ string, _, _ any) string { return "" },
		"stripeEntityURL": func(string, string) string { return "" },
		"deploymentName":  config.DeploymentName,
	})
	tmpl, err = web.ParseUIPartials(template.Must(tmpl.ParseFS(partialsSub, "operator_*.html")))
	if err != nil {
		t.Fatalf("ParseFS partials: %v", err)
	}
	tmpl, err = tmpl.ParseFS(sub, "operator.html")
	if err != nil {
		t.Fatalf("ParseFS operator.html: %v", err)
	}

	cases := []struct {
		name string
		data OperatorPageData
		want string
	}{
		{
			name: "landing",
			data: OperatorPageData{
				CSRFToken:  "csrf",
				IAPosition: "runtime:landing",
			},
			want: "Find a person or organization",
		},
		{
			// BodyTemplate dispatch branch must short-circuit the landing
			// surface; the stub renderBody returns "" so the assertion is
			// that the shell still renders (no landing markup leaks in).
			name: "body-template-dispatch",
			data: OperatorPageData{
				CSRFToken:        "csrf",
				IAPosition:       "runtime:organizations",
				ActiveCapability: "organizations",
				BodyTemplate:     "operator_organizations.html",
				BodyData:         nil,
			},
			want: `id="operator-main"`,
		},
		{
			// Dedicated Integrations section: the sidebar renders a labeled
			// "Integrations" home link to /operator/integrations. Provider
			// surfaces are reached from that home's provider cards, not from
			// sidebar children (maintainer 2026-08-23).
			name: "integration-section-home",
			data: OperatorPageData{
				CSRFToken:        "csrf",
				ActiveCapability: "integrations",
			},
			want: `href="/operator/integrations">Integrations</a>`,
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			var buf bytes.Buffer
			if err := tmpl.ExecuteTemplate(&buf, "operator.html", tc.data); err != nil {
				t.Fatalf("ExecuteTemplate: %v", err)
			}
			out := buf.String()
			if !strings.Contains(out, tc.want) {
				t.Errorf("rendered output missing %q", tc.want)
			}
			if !strings.Contains(out, `hx-boost="true"`) {
				t.Errorf("rendered output missing hx-boost on body")
			}
			if !strings.Contains(out, `id="operator-main"`) {
				t.Errorf("rendered output missing main#operator-main swap target")
			}
			// Slice 8 guard: legacy tabstrip markup must not reappear.
			if strings.Contains(out, `id="operatorTabs"`) {
				t.Errorf("legacy tabstrip leaked back into operator.html — re-check §5 retirement")
			}
		})
	}
}

// TestOperatorIntegrationsTemplate renders the Integrations landing body
// partial directly (the operator.html smoke test stubs renderBody, so the body
// markup is not exercised there). Covers a populated provider row and the
// empty state.
func TestOperatorIntegrationsTemplate(t *testing.T) {
	partialsSub, err := fs.Sub(embeds.Templates, "templates/partials")
	if err != nil {
		t.Fatalf("fs.Sub partials: %v", err)
	}
	tmpl := template.New("integrations").Funcs(template.FuncMap{
		"renderBody":      func(string, any) (template.HTML, error) { return "", nil },
		"routeURL":        web.RouteURL,
		"fieldErr":        func(_, _, _, _ string, _, _ any) string { return "" },
		"stripeEntityURL": func(string, string) string { return "" },
	})
	tmpl, err = web.ParseUIPartials(template.Must(tmpl.ParseFS(partialsSub, "operator_*.html")))
	if err != nil {
		t.Fatalf("ParseFS partials: %v", err)
	}

	t.Run("populated", func(t *testing.T) {
		var buf bytes.Buffer
		data := IntegrationsData{Integrations: []IntegrationRow{{
			Key:          "example",
			DisplayName:  "Example",
			Kind:         "provisioning",
			Status:       "active",
			SurfacePath:  "/operator/example-sites",
			Operations:   []string{"create", "delete", "set_status"},
			ResourceKeys: []ResourceKeyOption{{ResourceKey: "example_sites", DisplayName: "Example sites"}},
		}}}
		if err := tmpl.ExecuteTemplate(&buf, "operator_integrations.html", data); err != nil {
			t.Fatalf("ExecuteTemplate: %v", err)
		}
		out := buf.String()
		for _, want := range []string{"Example", "example_sites", "Example sites", "set_status", `href="/operator/example-sites"`, "Active"} {
			if !strings.Contains(out, want) {
				t.Errorf("integrations landing missing %q", want)
			}
		}
	})

	t.Run("empty", func(t *testing.T) {
		var buf bytes.Buffer
		if err := tmpl.ExecuteTemplate(&buf, "operator_integrations.html", IntegrationsData{}); err != nil {
			t.Fatalf("ExecuteTemplate empty: %v", err)
		}
		if !strings.Contains(buf.String(), "No integrations registered") {
			t.Errorf("empty state not rendered")
		}
	})
}