import {z} from 'zod'

export type GetApiV1MessagesOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const messageItemReactionsResponseDto = z.object({counts: z.record(z.string(), z.number()), userReacted: z.array(z.string()).optional()});

export const messageQueryUserResponseDto = z.object({fullName: z.string(), profileImage: z.string().nullable()});

export const messageItemResponseDto = z.object({content: z.string(), createdAt: z.string(), deletedAt: z.string().nullable(), flagCount: z.number(), id: z.string(), messageId: z.string(), reactions: messageItemReactionsResponseDto, tokenImage: z.string().nullable(), tokenName: z.string(), updatedAt: z.string().nullable(), user: messageQueryUserResponseDto, userAddress: z.string(), userProfile: messageQueryUserResponseDto});

export const messagePageInfoResponseDto = z.object({endCursor: z.string().nullable(), hasNextPage: z.boolean(), hasPreviousPage: z.boolean(), startCursor: z.string().nullable()});

export const messageListDataResponseDto = z.object({messages: z.array(messageItemResponseDto), pageInfo: messagePageInfoResponseDto});

export const messageListSuccessEnvelopeDto = z.object({data: messageListDataResponseDto, error: z.literal(false), message: z.string(), status: z.number()});

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
};

/**
 * Query unified messages (chat and comments)
 * 
 * GET /v1/messages
 */
export const getApiV1Messages = async (options?: GetApiV1MessagesOptions) => {
const {baseUrl = "https://lpad-backend.stage.defi.ovh.gala.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/v1/messages${query.size > 0 ? `?${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(messageListSuccessEnvelopeDto, await res.json())
};