import {z} from 'zod'

export type GetApiApiV1ContractsTopCompaniesArgs = {limit?: number | undefined};

export type GetApiApiV1ContractsTopCompaniesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const publicSourcePolicyMetadata = z.object({slug: z.string(), name: z.string(), license: z.string(), license_url: z.string().nullable().optional(), attribution_required: z.boolean(), attribution_text: z.string().nullable().optional(), official_url: z.string().nullable().optional(), reuse_conditions: z.string(), policy_effective_date: z.string(), reviewed_at: z.string(), data_updated_at: z.string().nullable().optional(), catalog_version: z.string()});

export const sourceCatalogEnvelope = z.object({catalog_version: z.string(), policy_fingerprint: z.string(), policy_effective_date: z.string().optional(), sources: z.record(z.string(), publicSourcePolicyMetadata)});

export const tenderSupplierResponse = z.object({schema_version: z.string(), count: z.number().int(), ranking: z.enum(["award_procedures_count_desc", "awards_count_desc"]), items: z.array(z.object({company_slug: z.string(), name: z.string(), cif: z.string(), notices_count: z.number().int().gte(0), award_procedures_count: z.number().int().gte(0), tenders_count: z.number().int(), tenders_count_status: z.literal("deprecated_alias_of_notices_count"), awards_count: z.number().int(), awards_count_status: z.literal("deprecated_alias_of_award_procedures_count"), buyers_count: z.number().int(), first_date: z.string().nullable(), last_date: z.string().nullable(), top_cpv: z.string().nullable()})), eligibility: z.string(), data_quality: z.string(), attribution: z.string(), _source_catalog: sourceCatalogEnvelope, _data_sources_used: z.array(publicSourcePolicyMetadata), _attributions: z.record(z.string(), z.string()).optional()});

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
};

/**
 * Corporate suppliers ranked by PLACSP award procedures
 * 
 * GET /api/v1/contracts/top-companies
 */
export const getApiApiV1ContractsTopCompanies = async (args: GetApiApiV1ContractsTopCompaniesArgs, options?: GetApiApiV1ContractsTopCompaniesOptions) => {
const {baseUrl = "https://openmercantil.es", fetch: fetchFn = fetch} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/contracts/top-companies${query.size > 0 ? `?${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(tenderSupplierResponse, await res.json())
};