import type { AgentMessage } from "@jaeswift/jae-agent-core";

export function exportSessionAsMarkdown(messages: AgentMessage[], title: string): void {
  const lines: string[] = [
    `# ${title || "JAE Session Export"}`,
    ``,
    `*Exported: ${new Date().toLocaleString()}*`,
    ``,
    `---`,
    ``,
  ];

  for (const msg of messages) {
    if (msg.role === "user") {
      const content = typeof msg.content === "string" ? msg.content : JSON.stringify(msg.content);
      lines.push(`## 👤 User`, ``, content, ``, `---`, ``);
    } else if (msg.role === "assistant") {
      const m = msg as any;
      const textBlocks = Array.isArray(m.content)
        ? m.content.filter((b: any) => b.type === "text").map((b: any) => b.text).join("\n")
        : m.content || "";
      lines.push(`## 🤖 Assistant`, ``, textBlocks, ``, `---`, ``);
    }
  }

  const blob = new Blob([lines.join("\n")], { type: "text/markdown" });
  const url = URL.createObjectURL(blob);
  const a = document.createElement("a");
  a.href = url;
  a.download = `jae-session-${Date.now()}.md`;
  a.click();
  URL.revokeObjectURL(url);
}

export function exportSessionAsJson(messages: AgentMessage[], title: string): void {
  const data = { title, exportedAt: new Date().toISOString(), messages };
  const blob = new Blob([JSON.stringify(data, null, 2)], { type: "application/json" });
  const url = URL.createObjectURL(blob);
  const a = document.createElement("a");
  a.href = url;
  a.download = `jae-session-${Date.now()}.json`;
  a.click();
  URL.revokeObjectURL(url);
}