import type { PluginPageDecl } from './contracts'

export interface PluginPageModule {
  mount(el: HTMLElement, bridge: unknown): void
  unmount?: () => void
}

// loadPluginPage 按声明加载 ESM。模块 URL 由插件页面声明给出，宿主不内嵌领域页面。
export async function loadPluginPage(page: PluginPageDecl): Promise<PluginPageModule> {
  if (!page.module) throw new Error(`plugin page ${page.id} missing module`)
  const mod = await import(/* @vite-ignore */ page.module)
  if (typeof mod.mount !== 'function') throw new Error(`plugin page ${page.id} has no mount`)
  return mod as PluginPageModule
}