import {z} from 'zod'

export type GetApiUsersIdCostBasisArgs = {id: number, method?: ('fifo' | 'lifo') | undefined};

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

export const costBasisHoldingDto = z.object({chainId: z.object({}).nullable(), chainKey: z.object({}).nullable(), assetAddress: z.string(), symbol: z.object({}).nullable(), decimals: z.object({}).nullable(), quantity: z.string(), costBasisUsd: z.string(), averageUnitCostUsd: z.string().nullable(), hasEstimatedBasis: z.boolean(), hasUnknownBasis: z.boolean(), lotCount: z.number(), currentUnitPriceUsd: z.string().nullable(), valuationPriceSource: z.enum(["registry", "registry_stale", "none"]), marketValueUsd: z.string().nullable(), unrealizedGainLossUsd: z.string().nullable()});

export const costBasisDisposalDto = z.object({actionId: z.string(), actionType: z.string(), chainId: z.object({}).nullable(), chainKey: z.object({}).nullable(), assetAddress: z.string(), symbol: z.object({}).nullable(), quantity: z.string(), proceedsUsd: z.string().nullable(), costBasisUsd: z.string().nullable(), realizedGainLossUsd: z.string().nullable(), acquiredAt: z.number(), disposedAt: z.number(), longTerm: z.boolean(), estimatedBasis: z.boolean(), basisUnknown: z.boolean()});

export const costBasisUnmatchedDisposalDto = z.object({actionId: z.string(), chainId: z.object({}).nullable(), chainKey: z.object({}).nullable(), assetAddress: z.string(), symbol: z.object({}).nullable(), quantity: z.string(), proceedsUsd: z.string().nullable(), disposedAt: z.number(), reason: z.enum(["no_open_lots", "insufficient_lots"])});

export const costBasisSkippedDto = z.object({legId: z.string(), reason: z.string()});

export const costBasisResponseDto = z.object({method: z.enum(["fifo", "lifo"]), holdings: z.array(costBasisHoldingDto), disposals: z.array(costBasisDisposalDto), unmatchedDisposals: z.array(costBasisUnmatchedDisposalDto), skipped: z.array(costBasisSkippedDto)});

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
};

/**
 * Cost basis for the caller’s active wallet: holdings valued at read time, realized disposals, unmatched disposals, and skipped legs
 * 
 * GET /users/{id}/cost-basis
 */
export const getApiUsersIdCostBasis = async (args: GetApiUsersIdCostBasisArgs, options: GetApiUsersIdCostBasisOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (args.method != null) query.append("method", String(args.method))
if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/users/${encodeURIComponent(String(args.id))}/cost-basis${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(costBasisResponseDto, await res.json())
};