package main

import (
	"bytes"
	"context"

	"git.dev.alexdunmow.com/block/core/blocks"
)

// LightboxGalleryBlockMeta defines the Noir lightbox gallery block.
var LightboxGalleryBlockMeta = blocks.BlockMeta{
	Key:         "lightbox_gallery",
	Title:       "Lightbox Gallery",
	Description: "Grid of photographs that expand into a full-viewport lightbox overlay on click.",
	Source:      "noir",
	Category:    blocks.CategoryContent,
}

// LightboxGalleryBlock renders the gallery from content.items + content.columns.
// Content shape: {"items":[{"image":"...","caption":"..."}, ...], "columns": 2|3|4}
func LightboxGalleryBlock(ctx context.Context, content map[string]any) string {
	items := getSlice(content, "items")
	cols := getInt(content, "columns", 3)
	if cols != 2 && cols != 3 && cols != 4 {
		cols = 3
	}

	var entries []LightboxItem
	for _, item := range items {
		entries = append(entries, LightboxItem{
			Image:   blocks.ResolveMediaPath(getString(item, "image")),
			Caption: getString(item, "caption"),
		})
	}

	var buf bytes.Buffer
	_ = lightboxGalleryComponent(entries, cols).Render(ctx, &buf)
	return buf.String()
}

// LightboxItem represents one photograph in the gallery.
type LightboxItem struct {
	Image   string
	Caption string
}