import type { FontListItem } from '../types/font'

interface FontMutationSuccessResponse {
  success: true
  fontList: FontListItem[]
}

interface FontMutationErrorResponse {
  success: false
  message?: string
}

type FontMutationResponse = FontMutationSuccessResponse | FontMutationErrorResponse

async function requestFontMutation(
  endpoint: string,
  payload: Record<string, string>,
): Promise<FontListItem[]> {
  const response = await fetch(endpoint, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
    },
    body: JSON.stringify(payload),
  })

  let body: FontMutationResponse | null = null
  try {
    body = (await response.json()) as FontMutationResponse
  } catch {
    // ignore parse errors and fallback to status text
  }

  if (!response.ok || !body || body.success !== true) {
    const message =
      body && body.success === false && body.message
        ? body.message
        : `请求失败（${response.status}）`
    throw new Error(message)
  }

  return body.fontList
}

/**
 * 重命名字体文件并返回最新字体列表。
 */
export function renameFontFile(fontPath: string, newName: string): Promise<FontListItem[]> {
  return requestFontMutation('/api/fonts/rename', {
    path: fontPath,
    newName,
  })
}

/**
 * 删除字体文件并返回最新字体列表。
 */
export function deleteFontFile(fontPath: string): Promise<FontListItem[]> {
  return requestFontMutation('/api/fonts/delete', {
    path: fontPath,
  })
}