package main

import (
	"bytes"
	"context"

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

// GalleryFanBlockMeta defines the mirrored fan gallery block.
var GalleryFanBlockMeta = blocks.BlockMeta{
	Key:         "gallery_fan",
	Title:       "Fan Gallery",
	Description: "Mirrored gallery framed by sunburst — collapses to single column under 640px.",
	Source:      "art-deco",
}

// GalleryImage is a single image in the gallery.
type GalleryImage struct {
	Src     string
	Caption string
}

// GalleryFanData is the typed view for the gallery component.
type GalleryFanData struct {
	Images  []GalleryImage
	Columns int
}

// GalleryFanBlock renders a mirrored fan gallery.
// Content: {"images": [{"src": "...", "caption": "..."}], "columns": 3}
func GalleryFanBlock(ctx context.Context, content map[string]any) string {
	items := getSlice(content, "images")
	images := make([]GalleryImage, 0, len(items))
	for _, item := range items {
		images = append(images, GalleryImage{
			Src:     getString(item, "src"),
			Caption: getString(item, "caption"),
		})
	}

	cols := getInt(content, "columns", 3)
	cols = clampInt(cols, 2, 4)

	var buf bytes.Buffer
	_ = galleryFanComponent(GalleryFanData{Images: images, Columns: cols}).Render(ctx, &buf)
	return buf.String()
}