import {z} from 'zod'

export type PowerBIMetadataRequest = {workspace_id: string, dataset_id: string};

export type CreateApiApiLiaAnalystPowerbiMetadataArgs = {body: PowerBIMetadataRequest};

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

export const powerBITableMetadata = z.object({name: z.string(), description: z.string().nullable().optional(), is_hidden: z.boolean().optional(), storage_mode: z.string().nullable().optional()});

export const powerBIColumnMetadata = z.object({table: z.string(), name: z.string(), data_type: z.string().nullable().optional(), description: z.string().nullable().optional(), is_hidden: z.boolean().optional()});

export const powerBIMeasureMetadata = z.object({table: z.string().nullable().optional(), name: z.string(), description: z.string().nullable().optional(), expression: z.string().nullable().optional()});

export const powerBISemanticModelMetadata = z.object({workspace_id: z.string(), dataset_id: z.string(), table_count: z.number().int(), column_count: z.number().int(), measure_count: z.number().int(), tables: z.array(powerBITableMetadata), columns: z.array(powerBIColumnMetadata), measures: z.array(powerBIMeasureMetadata)});

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
};

/**
 * Get Powerbi Metadata
 * 
 * POST /api/lia-analyst/powerbi/metadata
 */
export const createApiApiLiaAnalystPowerbiMetadata = async (args: CreateApiApiLiaAnalystPowerbiMetadataArgs, options: CreateApiApiLiaAnalystPowerbiMetadataOptions) => {
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/powerbi/metadata${query.size > 0 ? `?${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(powerBISemanticModelMetadata, await res.json())
};