import {z} from 'zod'

export type GetApiFundingV1MergersAndAcquisitionsArgs = {limit?: number | undefined, page?: number | undefined, acquiringEntityId?: Array<string> | undefined, acquiredEntityId?: Array<string> | undefined, transactionAmountMin?: number | undefined, transactionAmountMax?: number | undefined, announcedBefore?: string | undefined, announcedAfter?: string | undefined};

export type GetApiFundingV1MergersAndAcquisitionsOptions = {baseUrl?: string | undefined, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const fundingEntity = z.record(z.string(), z.unknown());

export const announcement = z.record(z.string(), z.unknown());

export const acquisitionDeal = z.object({acquiredEntity: fundingEntity, acquiringEntity: fundingEntity, announcementDate: z.string(), announcements: z.array(announcement), id: z.string(), status: z.enum(["Announced", "Completed", "Canceled"]), transactionAmountUSD: z.number().optional()});

export const pagination = z.object({limit: z.number().int(), page: z.number().int(), totalPages: z.number().int(), totalRows: z.number().int()});

export const getApiFundingV1MergersAndAcquisitionsResponse = z.object({data: z.array(acquisitionDeal), error: z.string().optional(), metadata: pagination.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
};

/**
 * GetAcquisitionDeals
 * 
 * GET /funding/v1/mergers-and-acquisitions
 */
export const getApiFundingV1MergersAndAcquisitions = async (args: GetApiFundingV1MergersAndAcquisitionsArgs, options?: GetApiFundingV1MergersAndAcquisitionsOptions) => {
const {baseUrl = "https://api.messari.io", fetch: fetchFn = fetch, apiKey} = 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.page != null) query.append("page", String(args.page))
for (const item of args.acquiringEntityId ?? []) query.append("acquiringEntityId", String(item))
for (const item of args.acquiredEntityId ?? []) query.append("acquiredEntityId", String(item))
if (args.transactionAmountMin != null) query.append("transactionAmountMin", String(args.transactionAmountMin))
if (args.transactionAmountMax != null) query.append("transactionAmountMax", String(args.transactionAmountMax))
if (args.announcedBefore != null) query.append("announcedBefore", String(args.announcedBefore))
if (args.announcedAfter != null) query.append("announcedAfter", String(args.announcedAfter))
if (apiKey !== undefined) headers.set("X-Messari-API-Key", apiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/funding/v1/mergers-and-acquisitions${query.size > 0 ? `?${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(getApiFundingV1MergersAndAcquisitionsResponse, await res.json())
};