import {z} from 'zod'

export type GetApiSkillsArgs = {limit?: number | undefined, offset?: (number | null) | undefined, q?: string | undefined};

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

export const skillFile = z.object({id: z.string(), name: z.string()});

export const skillSummary = z.object({id: z.string(), name: z.string(), description: z.string().nullable(), visibility: z.enum(["private", "organization"]), is_official: z.boolean(), files: z.array(skillFile), legal_category: z.enum(["commercial_contracts", "privacy_compliance", "employment", "procurement", "governance", "product_and_ip_counsel", "legal_operations", "real_estate_and_insurance", "litigation_and_disputes", "regulatory_and_compliance", "other", "null"]).nullable(), created_at: z.string().nullable(), updated_at: z.string().nullable()});

export const pagination = z.object({limit: z.number(), offset: z.number(), has_more: z.boolean()});

export const skillListResponse = z.object({skills: z.array(skillSummary), pagination: pagination});

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
};

/**
 * List skills
 * 
 * GET /skills
 */
export const getApiSkills = async (args: GetApiSkillsArgs, options?: GetApiSkillsOptions) => {
const {baseUrl = "https://app.gc.ai/api/external/v1", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.q != null) query.append("q", String(args.q))
if (ApiKeyAuth !== undefined) headers.set("Authorization", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/skills${query.size > 0 ? `?${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(skillListResponse, await res.json())
};