import {z} from 'zod'

export type GetApiApiV1SkillhubCatalogOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiApiV1SkillhubCatalogResponse = z.object({skills: z.array(z.object({slug: z.string(), name: z.string(), description: z.string(), downloads: z.number(), stars: z.number(), tags: z.array(z.string()), version: z.string(), updatedAt: z.string()})), installedSlugs: z.array(z.string()), installedSkills: z.array(z.object({slug: z.string(), source: z.enum(["managed", "custom", "workspace", "user"]), name: z.string(), description: z.string(), installedAt: z.string().nullable(), agentId: z.string().nullable(), agentName: z.string().nullable()})), meta: z.object({version: z.string(), updatedAt: z.string(), skillCount: z.number()}).nullable(), queue: z.array(z.object({slug: z.string(), source: z.enum(["managed", "custom", "workspace", "user"]), status: z.enum(["queued", "downloading", "installing-deps", "done", "failed"]), position: z.number(), error: z.string().nullable(), errorCode: z.enum(["skill_not_found", "rate_limit", "npm_missing", "deps_install_failed", "unknown"]).nullable(), retries: z.number(), enqueuedAt: z.string()}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * GET /api/v1/skillhub/catalog
 */
export const getApiApiV1SkillhubCatalog = async (options: GetApiApiV1SkillhubCatalogOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/skillhub/catalog${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiApiV1SkillhubCatalogResponse, await res.json())
};