import {z} from 'zod'

export type TokensUsageRawData = {type: 'tokens-usage-raw-data', schema: {dateFrom: string, dateTo: string, format?: ('json' | 'csv') | undefined, projectIds?: Array<number> | undefined, promptIds?: Array<number> | undefined, userIds?: Array<number> | undefined, languageIds?: Array<string> | undefined}};

export type AiReportBase = {dateFrom: string, dateTo: string, format?: ('json' | 'csv') | undefined, projectIds?: Array<number> | undefined, promptIds?: Array<number> | undefined, userIds?: Array<number> | undefined};

export type CostsByUsers = {type: 'costs-by-users', schema: AiReportBase};

export type CreateApiAiReportsArgs = {body: TokensUsageRawData | CostsByUsers};

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

export const aiReportGenerate = z.object({identifier: z.string().optional(), status: z.string().optional(), progress: z.number().int().optional(), attributes: z.object({format: z.string().optional(), reportType: z.string().optional(), schema: z.object({}).optional()}).optional(), createdAt: z.string().optional(), updatedAt: z.string().optional(), startedAt: z.string().optional(), finishedAt: z.string().optional(), eta: z.string().optional()});

export const aiReportResource = z.object({data: aiReportGenerate});

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
};

/**
 * Generate AI Report
 * 
 * POST /ai/reports
 */
export const createApiAiReports = async (args: CreateApiAiReportsArgs, options?: CreateApiAiReportsOptions) => {
const {baseUrl = "https://api.crowdin.com/api/v2", fetch: fetchFn = fetch} = options ?? {}

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

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