package bnp

import (
	"testing"

	abiv1 "git.dev.alexdunmow.com/block/core/abi/v1"
)

// TestApplyManifestYAMLSupplementsWithoutWiping proves the WO-WZ-021 mixed-form
// builder semantics: folding manifest.yaml onto a manifest that already carries
// guest DESCRIBE output SUPPLEMENTS the declarative surfaces and OVERRIDES only
// the keys it actually declares — an undeclared scalar key never wipes a
// guest-populated field.
func TestApplyManifestYAMLSupplementsWithoutWiping(t *testing.T) {
	dir := t.TempDir()
	writeFixture(t, dir, map[string]string{
		"manifest.yaml": "" +
			"bundled_fonts: fonts.json\n" +
			"page_templates:\n" +
			"  - {system: blog, key: listing, title: Listing}\n" +
			"email_wrappers: [newsletter]\n",
		"fonts.json":                          `{"fonts":["Inter"]}`,
		"templates/blog/listing.ninjatpl":     `<main>{{ title }}</main>`,
		"templates/email/newsletter.ninjatpl": `<table>{{ body|safe }}</table>`,
	})

	// Simulate a guest DESCRIBE result: theme_presets set by the guest, plus a
	// guest-rendered page template the manifest.yaml does NOT list.
	m := &abiv1.PluginManifest{
		AbiVersion:   1,
		Name:         "fixture-mixed",
		Version:      "0.1.0",
		ThemePresets: []byte(`{"guest":true}`),
		PageTemplates: []*abiv1.PageTemplateMeta{
			{SystemKey: "blog", Key: "guestonly", Title: "Guest Only"},
		},
	}

	if err := applyManifestYAML(dir, m); err != nil {
		t.Fatalf("applyManifestYAML: %v", err)
	}

	// Undeclared theme_presets must be PRESERVED, not wiped to nil.
	if string(m.ThemePresets) != `{"guest":true}` {
		t.Errorf("theme_presets wiped/altered: %q", string(m.ThemePresets))
	}
	// Declared bundled_fonts folded in.
	if string(m.BundledFonts) != `{"fonts":["Inter"]}` {
		t.Errorf("bundled_fonts = %q", string(m.BundledFonts))
	}
	// Declared page template appended alongside the guest one (2 total).
	if len(m.PageTemplates) != 2 {
		t.Fatalf("page templates = %d, want 2 (guest + declarative)", len(m.PageTemplates))
	}
	// Declared email wrapper folded in.
	if len(m.EmailWrapperSystemKeys) != 1 || m.EmailWrapperSystemKeys[0] != "newsletter" {
		t.Errorf("email wrappers = %v", m.EmailWrapperSystemKeys)
	}
}

// TestWasmBuildFoldsManifestYAML end-to-end: a repo with Go source AND a
// manifest.yaml builds a (non-codeless) wasm artifact whose manifest.pb carries
// the folded declarative surfaces. The absence of a manifest.yaml is a no-op —
// covered by every existing wasm build test.
func TestApplyManifestYAMLNoFileIsNoop(t *testing.T) {
	dir := t.TempDir() // no manifest.yaml
	m := &abiv1.PluginManifest{
		AbiVersion:   1,
		Name:         "fixture-pure",
		Version:      "0.1.0",
		ThemePresets: []byte(`{"guest":true}`),
	}
	if err := applyManifestYAML(dir, m); err != nil {
		t.Fatalf("applyManifestYAML (no file): %v", err)
	}
	if string(m.ThemePresets) != `{"guest":true}` {
		t.Errorf("no-manifest.yaml build mutated the manifest: %q", string(m.ThemePresets))
	}
}