import {z} from 'zod'

export type GetApiConsentsArgs = {candidateId: string};

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

export const consentLegalBasisDto = z.object({name: z.enum(["CONSENT", "CONTRACT", "LEGAL_OBLIGATION", "VITAL_INTEREST", "PUBLIC_TASK", "LEGITIMATE_INTEREST"])});

export const consentPurposeDto = z.union([z.object({type: z.literal("custom"), id: z.string().min(1), name: z.string().min(1)}), z.object({type: z.literal("system"), name: z.enum(["RECRUITING", "MARKETING_EMAIL", "MARKETING_SMS", "WHATSAPP_BUSINESS_UTILITY", "WHATSAPP_BUSINESS_MARKETING"])})]);

export const consentPurposeResponseDto = z.object({purpose: consentPurposeDto});

export const dateISO = z.string();

export const consentDto = z.object({id: z.string().min(1), framework: z.enum(["GDPR", "PDPO"]).nullable(), legalBasis: consentLegalBasisDto, purpose: consentPurposeResponseDto, comments: z.string().nullable(), status: z.enum(["GRANTED", "REVOKED"]), source: z.enum(["candidate-portal", "manual", "vacancy-portal"]).nullable(), receivedAt: dateISO, validUntil: dateISO, createdAt: dateISO});

export const getConsentsResponseDto = z.object({consents: z.array(consentDto)});

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 consents
 * 
 * GET /consents
 */
export const getApiConsents = async (args: GetApiConsentsArgs, options: GetApiConsentsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, xApiKey} = options ?? {}

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

if (args.candidateId != null) query.append("candidateId", String(args.candidateId))
if (xApiKey !== undefined) headers.set("x-api-key", xApiKey)

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