// Helper fuer Inline-Tool-Karten in Assistant-Messages (Phase 8)
//
// Mapping Tool-Name -> Icon, Akzentfarbe, Default-Collapse-Verhalten,
// Subtitel-Generierung. Die eigentliche Card-Komponente wird in
// ToolCallCard.svelte gewaehlt; hier sind nur statische Metadaten.

export type ToolKind =
	| 'read'      // Read, Glob, NotebookRead
	| 'edit'      // Edit, Write, NotebookEdit, MultiEdit
	| 'bash'      // Bash, BashOutput, KillShell
	| 'search'    // Grep, Glob (alternativ)
	| 'web'       // WebFetch, WebSearch
	| 'task'      // Task (Subagent)
	| 'mcp'       // mcp__*
	| 'todo'      // TodoWrite
	| 'generic';

export interface ToolMeta {
	kind: ToolKind;
	icon: string;          // Emoji-Icon (matcht VS-Code-Extension-Konvention)
	label: string;         // Lesbarer Tool-Name (Original beibehalten wenn moeglich)
	collapseWhenDone: boolean; // VS-Code: Read collapsed nach Erfolg, Edit aufgeklappt
}

export function getToolMeta(toolName: string): ToolMeta {
	const t = (toolName || '').toLowerCase();

	// MCP-Tools (mcp__server__name)
	if (t.startsWith('mcp__')) {
		return { kind: 'mcp', icon: '🛠️', label: toolName, collapseWhenDone: true };
	}

	// Edit/Write-Familie
	if (t === 'edit' || t === 'write' || t === 'multiedit' || t === 'notebookedit') {
		return { kind: 'edit', icon: '✏️', label: toolName, collapseWhenDone: false };
	}

	// Read-Familie
	if (t === 'read' || t === 'notebookread') {
		return { kind: 'read', icon: '📖', label: toolName, collapseWhenDone: true };
	}

	// Bash-Familie
	if (t === 'bash' || t === 'bashoutput' || t === 'killshell') {
		return { kind: 'bash', icon: '🖥️', label: toolName, collapseWhenDone: true };
	}

	// Such-Tools
	if (t === 'grep') return { kind: 'search', icon: '🔍', label: toolName, collapseWhenDone: true };
	if (t === 'glob') return { kind: 'search', icon: '📁', label: toolName, collapseWhenDone: true };

	// Web-Tools
	if (t === 'webfetch') return { kind: 'web', icon: '🌐', label: toolName, collapseWhenDone: true };
	if (t === 'websearch') return { kind: 'web', icon: '🔎', label: toolName, collapseWhenDone: true };

	// Subagent-Spawn
	if (t === 'task') return { kind: 'task', icon: '👥', label: toolName, collapseWhenDone: false };

	// Todo
	if (t === 'todowrite') return { kind: 'todo', icon: '📋', label: toolName, collapseWhenDone: true };

	// Fallback
	return { kind: 'generic', icon: '⚙️', label: toolName || 'Tool', collapseWhenDone: true };
}

// Erzeugt einen kompakten Untertitel fuer den Karten-Header.
// Bsp: { file_path: "src/app.ts", offset: 45, limit: 35 } -> "src/app.ts:45-79"
export function getToolSubtitle(tool: string, input: Record<string, unknown> = {}): string {
	const t = (tool || '').toLowerCase();
	const path = (input.file_path || input.path || input.notebook_path) as string | undefined;

	if (path) {
		// Pfad kuerzen: "/mnt/17 - Entwicklungen/.../foo/bar.ts" -> "bar.ts"
		const short = path.split('/').slice(-2).join('/');
		if (t === 'read' || t === 'notebookread') {
			const offset = input.offset as number | undefined;
			const limit = input.limit as number | undefined;
			if (typeof offset === 'number' && typeof limit === 'number') {
				return `${short}:${offset}-${offset + limit - 1}`;
			}
			return short;
		}
		return short;
	}

	if (t === 'bash' || t === 'bashoutput') {
		const cmd = (input.command as string) || (input.bash_id as string) || '';
		return cmd.length > 60 ? cmd.slice(0, 57) + '…' : cmd;
	}

	if (t === 'grep') {
		const pattern = (input.pattern as string) || '';
		const where = (input.path as string) || (input.glob as string) || '';
		return where ? `"${pattern}" in ${where}` : `"${pattern}"`;
	}

	if (t === 'glob') {
		return (input.pattern as string) || '';
	}

	if (t === 'webfetch') return (input.url as string) || '';
	if (t === 'websearch') return (input.query as string) || '';
	if (t === 'task') {
		const desc = (input.description as string) || (input.subagent_type as string) || '';
		return desc;
	}
	if (t.startsWith('mcp__')) {
		// Tool-Name selbst ist informativ genug
		return '';
	}
	if (t === 'todowrite') {
		const todos = input.todos as Array<{ status?: string }> | undefined;
		if (Array.isArray(todos)) {
			const total = todos.length;
			const done = todos.filter(x => x.status === 'completed').length;
			return `${done}/${total} erledigt`;
		}
		return '';
	}

	return '';
}