import {z} from 'zod'

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

export const pastRunSummary = z.object({run_id: z.string().nullable(), dir_name: z.string(), status: z.string(), run_mode: z.string().nullable().optional(), started_at: z.string().nullable(), completed_at: z.string().nullable().optional(), simulation_date: z.string().nullable(), llm_provider: z.string().nullable(), tickers: z.array(z.string()).nullable(), initial_cash_balance: z.number().nullable().optional(), broker_start_equity: z.number().nullable().optional(), leverage_multiplier: z.number().nullable().optional(), initial_buying_power: z.number().nullable().optional(), spx_start_price: z.number().nullable().optional(), spx_end_price: z.number().nullable().optional(), broker_account_id: z.string().nullable().optional(), broker_account_name: z.string().nullable().optional(), results_summary: z.record(z.string(), z.unknown()).nullable().optional()});

export const pastRunsListResponse = z.object({runs: z.array(pastRunSummary)});

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
};

/**
 * List Past Runs
 * 
 * GET /api/past-runs
 */
export const getApiApiPastRuns = async (options: GetApiApiPastRunsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/past-runs${query.size > 0 ? `?${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(pastRunsListResponse, await res.json())
};