import {z} from 'zod'

export type GetApiGovernanceProposalsArgs = {proposalId?: number | undefined, state?: string | undefined, order?: string | undefined, limit?: number | undefined, page?: number | undefined};

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

export const getApiGovernanceProposalsResponse = z.object({offset: z.number().optional(), limit: z.number().optional(), total: z.number().optional(), result: z.array(z.object({proposalId: z.number().int(), description: z.string(), createdBlock: z.number().int(), createdTxHash: z.string(), createdTimestamp: z.number().int(), startBlock: z.number().int(), startTimestamp: z.number().int(), cancelBlock: z.number().int().nullable(), cancelTxHash: z.string().nullable(), cancelTimestamp: z.number().int().nullable(), endBlock: z.number().int(), endTimestamp: z.number().int(), queuedBlock: z.number().int().nullable(), queuedTxHash: z.string().nullable(), queuedTimestamp: z.number().int().nullable(), executedBlock: z.number().int().nullable(), executedTxHash: z.string().nullable(), executedTimestamp: z.number().int().nullable(), proposer: z.string(), eta: z.number().int(), forVotes: z.string().optional(), againstVotes: z.string().optional(), canceled: z.boolean().optional(), executed: z.boolean().optional(), state: z.number().int(), voterCount: z.number().int().optional(), abstainedVotes: z.string().optional(), governorName: z.string(), proposalType: z.number().int().optional()})).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
};

/**
 * Returns paginated array of proposals.
 * 
 * GET /governance/proposals
 */
export const getApiGovernanceProposals = async (args: GetApiGovernanceProposalsArgs, options: GetApiGovernanceProposalsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.proposalId != null) query.append("proposalId", String(args.proposalId))
if (args.state != null) query.append("state", String(args.state))
if (args.order != null) query.append("order", String(args.order))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.page != null) query.append("page", String(args.page))

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