import {z} from 'zod'

export type AnalystFilter = {table: string, column: string, operator: 'equals' | 'in' | 'not_in' | 'between', values: Array<unknown>};

export type AnalystChatRequest = {workspace_id: string, report_id: string, dataset_id: string, question: string, conversation_id?: (string | null) | undefined, filters?: Array<AnalystFilter> | undefined};

export type CreateApiApiLiaAnalystAnalystChatArgs = {body: AnalystChatRequest};

export type CreateApiApiLiaAnalystAnalystChatOptions = {baseUrl: string, OAuth2PasswordBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const analystFilter = z.object({table: z.string().min(1), column: z.string().min(1), operator: z.enum(["equals", "in", "not_in", "between"]), values: z.array(z.unknown())});

export const analystChatResponse = z.object({conversation_id: z.string(), question: z.string(), answer: z.string(), dax_query: z.string(), row_count: z.number().int(), data: z.array(z.record(z.string(), z.unknown())), applied_filters: z.array(analystFilter)});

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
};

/**
 * Analyst Chat
 * 
 * POST /api/lia-analyst/analyst/chat
 */
export const createApiApiLiaAnalystAnalystChat = async (args: CreateApiApiLiaAnalystAnalystChatArgs, options: CreateApiApiLiaAnalystAnalystChatOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2PasswordBearer} = options ?? {}

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

if (OAuth2PasswordBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2PasswordBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/lia-analyst/analyst/chat${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(analystChatResponse, await res.json())
};