import {z} from 'zod'

export type GetApiTransactionsArgs = {ids?: Array<string> | undefined, limit?: number | undefined, offset?: number | undefined, startDate?: string | undefined, endDate?: string | undefined, startDateModified?: string | undefined, endDateModified?: string | undefined, text?: string | undefined, categoryId?: string | undefined, accountId?: string | undefined, accountIds?: Array<string> | undefined, projectId?: string | undefined, projectIds?: Array<string> | undefined, creditDebitIndicator?: string | undefined, hasProject?: boolean | undefined, onlyCount?: boolean | undefined, contains?: string | undefined, hasEnhancedCategory?: string | undefined, counterpartyIds?: Array<string> | undefined, counterpartyIdsV2?: Array<string> | undefined, counterpartiesVersion?: ('v2' | 'v3') | undefined, enhancedCategories?: string | undefined};

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

export const transaction = z.object({accountId: z.string().optional(), amount: z.object({value: z.number().int(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string()}), categoryId: z.string(), categoryIdConfirmed: z.boolean(), date: z.string(), dateModified: z.string(), dateCreated: z.string().optional(), valueDate: z.string().optional(), id: z.string(), longDescription: z.string(), providerId: z.string().optional(), notes: z.string(), shortDescription: z.string(), counterpartyId: z.string().optional(), status: z.enum(["posted", "pending"]), projectId: z.string().optional(), enhancedCategories: z.object({"uk-tax-hmrc": z.string().optional()}).optional(), splits: z.array(z.object({amount: z.object({value: z.number().int().optional(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string().optional()}), categoryId: z.string(), description: z.string(), id: z.string(), projectId: z.string().optional()})).optional(), transactionCode: z.object({code: z.string(), subCode: z.string()}).optional(), proprietaryTransactionCode: z.object({code: z.string(), issuer: z.string().optional()}).optional(), balance: z.object({value: z.number().int().optional(), majorUnits: z.number().int().optional(), minorUnits: z.number().int().optional(), currency: z.string().optional()}).optional(), balanceType: z.string().optional(), statementReference: z.string().optional(), merchantName: z.string().optional(), merchantCategoryCode: z.string().optional(), cardInstrument: z.object({name: z.string().optional(), pan: z.string().optional(), cardSchemeName: z.string().optional(), authorisationType: z.string().optional()}).optional(), creditorAccount: z.object({name: z.string().optional(), sortCode: z.string().optional(), accountNumber: z.string().optional(), iban: z.string().optional(), pan: z.string().optional()}).optional(), creditorAgent: z.object({name: z.string().optional(), postalAddress: z.record(z.string(), z.unknown()).optional()}).optional(), debtorAccount: z.object({name: z.string().optional(), sortCode: z.string().optional(), accountNumber: z.string().optional(), iban: z.string().optional(), pan: z.string().optional()}).optional(), debtorAgent: z.object({name: z.string().optional(), postalAddress: z.record(z.string(), z.unknown()).optional()}).optional(), transactionReference: z.string().optional(), transactionInformation: z.string().optional()});

export const links = z.object({next: z.string().optional(), prev: z.string().optional(), self: z.string()});

export const getApiTransactionsResponse = z.object({data: z.array(transaction).optional(), links: links.optional(), meta: z.object({}).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
};

/**
 * Retrieve all transactions for a user that have been enriched with our categorisation engine
 * 
 * GET /transactions
 */
export const getApiTransactions = async (args: GetApiTransactionsArgs, options?: GetApiTransactionsOptions) => {
const {baseUrl = "https://api.moneyhub.co.uk/v2.0", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

for (const item of args.ids ?? []) query.append("ids", String(item))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))
if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (args.startDateModified != null) query.append("startDateModified", String(args.startDateModified))
if (args.endDateModified != null) query.append("endDateModified", String(args.endDateModified))
if (args.text != null) query.append("text", String(args.text))
if (args.categoryId != null) query.append("categoryId", String(args.categoryId))
if (args.accountId != null) query.append("accountId", String(args.accountId))
for (const item of args.accountIds ?? []) query.append("accountIds", String(item))
if (args.projectId != null) query.append("projectId", String(args.projectId))
for (const item of args.projectIds ?? []) query.append("projectIds", String(item))
if (args.creditDebitIndicator != null) query.append("creditDebitIndicator", String(args.creditDebitIndicator))
if (args.hasProject != null) query.append("hasProject", String(args.hasProject))
if (args.onlyCount != null) query.append("onlyCount", String(args.onlyCount))
if (args.contains != null) query.append("contains", String(args.contains))
if (args.hasEnhancedCategory != null) query.append("hasEnhancedCategory", String(args.hasEnhancedCategory))
for (const item of args.counterpartyIds ?? []) query.append("counterpartyIds", String(item))
for (const item of args.counterpartyIdsV2 ?? []) query.append("counterpartyIdsV2", String(item))
if (args.counterpartiesVersion != null) query.append("counterpartiesVersion", String(args.counterpartiesVersion))
if (args.enhancedCategories != null) query.append("enhancedCategories", String(args.enhancedCategories))
if (Bearer !== undefined) headers.set("Authorization", Bearer)

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