import fs from 'fs'

import yaml from 'js-yaml'
import * as z from 'zod'

export const THEME_FILENAME = 'theme.yml'

export const zTheme = z
  .object({
    title: z.string(),
    description: z.string().optional(),
    keywords: z.array(z.string()).optional(),
    nav: z
      .array(
        z
          .object({
            name: z.string(),
            to: z.string(),
          })
          .or(
            z.object({
              name: z.string(),
              href: z.string(),
            })
          )
      )
      .optional(),
    author: z
      .object({
        url: z.string().optional(),
        email: z.string().optional(),
        name: z.string(),
      })
      .nonstrict(),
    analytics: z
      .object({
        plausible: z.string().optional(),
      })
      .optional(),
    comment: z
      .object({
        remark42: z
          .object({
            host: z.string(),
            siteId: z.string(),
          })
          .optional(),
      })
      .optional(),
  })
  .nonstrict()

export function getTheme() {
  return zTheme.parse(yaml.safeLoad(fs.readFileSync(THEME_FILENAME, 'utf-8')))
}