/**
 * Canvas Tool Registry — shared by server (Gemini function declarations) and client (shape spawning).
 * Pure TypeScript, no DOM or server dependencies.
 */

export interface CanvasToolDefinition {
	declaration: {
		name: string;
		description: string;
		parameters: {
			type: "object";
			properties: Record<string, { type: string; description: string; enum?: string[] }>;
			required: string[];
		};
	};
	tagName: string;
	buildProps: (args: Record<string, any>) => Record<string, any>;
	actionLabel: (args: Record<string, any>) => string;
}

const registry: CanvasToolDefinition[] = [
	{
		declaration: {
			name: "create_map",
			description: "Create an interactive map centered on a location. Use when the user wants to see a place, get directions, or explore a geographic area.",
			parameters: {
				type: "object",
				properties: {
					latitude: { type: "number", description: "Latitude of the center point" },
					longitude: { type: "number", description: "Longitude of the center point" },
					zoom: { type: "number", description: "Zoom level (1-18, default 12)" },
					location_name: { type: "string", description: "Human-readable name of the location" },
				},
				required: ["latitude", "longitude", "location_name"],
			},
		},
		tagName: "folk-map",
		buildProps: (args) => ({
			center: [args.longitude, args.latitude],
			zoom: args.zoom || 12,
		}),
		actionLabel: (args) => `Created map: ${args.location_name}`,
	},
	{
		declaration: {
			name: "create_note",
			description: "Create a markdown note on the canvas. Use for text content, lists, summaries, instructions, or any written information.",
			parameters: {
				type: "object",
				properties: {
					content: { type: "string", description: "Markdown content for the note" },
					title: { type: "string", description: "Optional title for the note" },
				},
				required: ["content"],
			},
		},
		tagName: "folk-markdown",
		buildProps: (args) => ({
			value: args.title ? `# ${args.title}\n\n${args.content}` : args.content,
		}),
		actionLabel: (args) => `Created note${args.title ? `: ${args.title}` : ""}`,
	},
	{
		declaration: {
			name: "create_embed",
			description: "Embed a webpage or web app on the canvas. Use for websites, search results, booking sites, videos, or any URL the user wants to view inline.",
			parameters: {
				type: "object",
				properties: {
					url: { type: "string", description: "The URL to embed" },
					title: { type: "string", description: "Descriptive title for the embed" },
				},
				required: ["url"],
			},
		},
		tagName: "folk-embed",
		buildProps: (args) => ({
			url: args.url,
		}),
		actionLabel: (args) => `Embedded: ${args.title || args.url}`,
	},
	{
		declaration: {
			name: "create_image",
			description: "Display an image on the canvas from a URL. Use when showing an existing image, photo, diagram, or any direct image link.",
			parameters: {
				type: "object",
				properties: {
					src: { type: "string", description: "Image URL" },
					alt: { type: "string", description: "Alt text describing the image" },
				},
				required: ["src"],
			},
		},
		tagName: "folk-image",
		buildProps: (args) => ({
			src: args.src,
			alt: args.alt || "",
		}),
		actionLabel: (args) => `Created image${args.alt ? `: ${args.alt}` : ""}`,
	},
	{
		declaration: {
			name: "create_bookmark",
			description: "Create a bookmark card for a URL. Use when the user wants to save or reference a link without embedding the full page.",
			parameters: {
				type: "object",
				properties: {
					url: { type: "string", description: "The URL to bookmark" },
				},
				required: ["url"],
			},
		},
		tagName: "folk-bookmark",
		buildProps: (args) => ({
			url: args.url,
		}),
		actionLabel: (args) => `Bookmarked: ${args.url}`,
	},
	{
		declaration: {
			name: "create_image_gen",
			description: "Generate an AI image from a text prompt. Use when the user wants to create, generate, or imagine a new image that doesn't exist yet.",
			parameters: {
				type: "object",
				properties: {
					prompt: { type: "string", description: "Text prompt describing the image to generate" },
					style: {
						type: "string",
						description: "Visual style for the generated image",
						enum: ["photorealistic", "illustration", "painting", "sketch", "punk-zine", "collage", "vintage", "minimalist"],
					},
				},
				required: ["prompt"],
			},
		},
		tagName: "folk-image-gen",
		buildProps: (args) => ({
			prompt: args.prompt,
			style: args.style || "photorealistic",
		}),
		actionLabel: (args) => `Generating image: ${args.prompt.slice(0, 50)}${args.prompt.length > 50 ? "..." : ""}`,
	},
];

export const CANVAS_TOOLS: CanvasToolDefinition[] = [...registry];

export const CANVAS_TOOL_DECLARATIONS = CANVAS_TOOLS.map((t) => t.declaration);

export function findTool(name: string): CanvasToolDefinition | undefined {
	return CANVAS_TOOLS.find((t) => t.declaration.name === name);
}

export function registerCanvasTool(def: CanvasToolDefinition): void {
	CANVAS_TOOLS.push(def);
}