import {z} from 'zod'

export type FundingStatusEnum = 'active' | 'expired' | 'no_funding_period';

export type AppTypesGrantGrantSearchFilters = {include_words?: (Array<string> | null) | undefined, exclude_words?: (Array<string> | null) | undefined, keyword_logic?: (string | null) | undefined, title_only?: boolean | undefined, min_amount?: (number | null) | undefined, max_amount?: (number | null) | undefined, funding_agencies_include?: (Array<string> | null) | undefined, funding_agencies_exclude?: (Array<string> | null) | undefined, funding_period_start?: (string | null) | undefined, funding_period_end?: (string | null) | undefined, funding_statuses?: (Array<FundingStatusEnum> | null) | undefined, selected_states?: (Array<string> | null) | undefined, selected_institution_types?: (Array<string> | null) | undefined, institutions_include?: (Array<string> | null) | undefined, offset?: number | undefined, limit?: number | undefined};

export type CreateApiApiV3GrantsSearchArgs = {body: AppTypesGrantGrantSearchFilters};

export type CreateApiApiV3GrantsSearchOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const grantTransactionResponse = z.object({id: z.string(), institution_id: z.string().nullable(), total_obligated_amount: z.number(), outlayed_amount: z.number().nullable(), period_of_performance_start_date: z.string().nullable(), period_of_performance_end_date: z.string().nullable(), last_modified_date: z.string().nullable(), source_url: z.string().nullable(), action_type: z.string().nullable(), action_type_description: z.string().nullable(), awardee_name: z.string().nullable().optional()});

export const grantDetailResponse = z.object({id: z.string(), title: z.string(), description: z.string().nullable().optional(), funding_agency: z.string(), awardee_name: z.string().nullable().optional(), total_obligated_amount: z.number(), period_of_performance_start_date: z.string().nullable().optional(), period_of_performance_end_date: z.string().nullable().optional(), last_modified_date: z.string(), grant_link: z.string().nullable().optional(), outlayed_amount: z.number().nullable().optional(), external_grant_id: z.string().nullable().optional(), transaction_count: z.number().int().optional(), institution_name: z.string().nullable().optional(), institution_state: z.string().nullable().optional(), institution_type: z.string().nullable().optional(), institution_id: z.string().nullable().optional(), relevance_rank: z.number().nullable().optional(), score: z.number().nullable().optional(), relevance_score: z.number().nullable().optional(), decay_score: z.number().nullable().optional(), transactions: z.array(grantTransactionResponse).optional()});

export const paginatedResponseGrantDetailResponse = z.object({results: z.array(grantDetailResponse), total: z.number().int(), offset: z.number().int(), limit: z.number().int()});

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
};

/**
 * Search Grants
 * 
 * POST /api/v3/grants/search
 */
export const createApiApiV3GrantsSearch = async (args: CreateApiApiV3GrantsSearchArgs, options: CreateApiApiV3GrantsSearchOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v3/grants/search${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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