import {z} from 'zod'

export type GetApiDisputesArgs = {count?: number | undefined, skip?: number | undefined, 'expand[]'?: ('payment' | 'transaction.settlement') | undefined};

export type GetApiDisputesOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const disputeEvidence = z.object({amount: z.number().int().optional(), summary: z.string().optional(), shipping_proof: z.array(z.string()).optional(), billing_proof: z.array(z.string()).optional(), cancellation_proof: z.array(z.string()).optional(), customer_communication: z.array(z.string()).optional(), proof_of_service: z.array(z.string()).optional(), explanation_letter: z.array(z.string()).optional(), refund_confirmation: z.array(z.string()).optional(), access_activity_log: z.array(z.string()).optional(), refund_cancellation_policy: z.array(z.string()).optional(), term_and_conditions: z.array(z.string()).optional(), others: z.array(z.object({})).optional(), submitted_at: z.unknown()});

export const dispute = z.object({id: z.string().optional(), entity: z.literal("dispute").optional(), payment_id: z.string().optional(), amount: z.number().int().optional(), currency: z.string().optional(), amount_deducted: z.number().int().optional(), reason_code: z.string().optional(), reason_description: z.string().optional(), respond_by: z.number().int().optional(), status: z.enum(["open", "under_review", "won", "lost", "closed"]).optional(), phase: z.enum(["fraud", "retrieval", "chargeback", "pre_arbitration", "arbitration"]).optional(), created_at: z.number().int().optional(), evidence: disputeEvidence.optional()});

export const getApiDisputesResponse = z.object({entity: z.literal("collection").optional(), count: z.number().int().optional(), items: z.array(dispute).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
};

/**
 * Fetch all disputes
 * 
 * GET /disputes
 * 
 * Also accepts auth: oauth2
 */
export const getApiDisputes = async (args: GetApiDisputesArgs, options?: GetApiDisputesOptions) => {
const {baseUrl = "https://api.razorpay.com/v1", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.count != null) query.append("count", String(args.count))
if (args.skip != null) query.append("skip", String(args.skip))
if (args['expand[]'] != null) query.append("expand[]", String(args['expand[]']))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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