import {z} from 'zod'

export type QueryVariable = {name?: string | undefined, operation?: ('equals' | 'notEquals' | 'equalsIgnoreCase' | 'notEqualsIgnoreCase' | 'like' | 'likeIgnoreCase' | 'greaterThan' | 'greaterThanOrEquals' | 'lessThan' | 'lessThanOrEquals' | 'exists' | 'notExists') | undefined, value?: Record<string, never> | undefined, type?: string | undefined};

export type HistoricVariableInstanceQueryRequest = {start?: number | undefined, size?: number | undefined, sort?: string | undefined, order?: string | undefined, excludeTaskVariables?: boolean | undefined, taskId?: string | undefined, planItemInstanceId?: string | undefined, caseInstanceId?: string | undefined, variableName?: string | undefined, variableNameLike?: string | undefined, variables?: Array<QueryVariable> | undefined, excludeLocalVariables?: boolean | undefined};

export type CreateApiCmmnQueryHistoricVariableInstancesArgs = {sort?: ('caseInstanceId' | 'variableName') | undefined, body: HistoricVariableInstanceQueryRequest};

export type CreateApiCmmnQueryHistoricVariableInstancesOptions = {baseUrl: string, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const restVariable = z.object({name: z.string().optional(), type: z.string().optional(), value: z.object({}).optional(), valueUrl: z.string().optional(), scope: z.string().optional()});

export const historicVariableInstanceResponse = z.object({id: z.string().optional(), caseInstanceId: z.string().optional(), caseInstanceUrl: z.string().optional(), taskId: z.string().optional(), planItemInstanceId: z.string().optional(), variable: restVariable.optional()});

export const dataResponseHistoricVariableInstanceResponse = z.object({data: z.array(historicVariableInstanceResponse).optional(), total: z.number().int().optional(), start: z.number().int().optional(), sort: z.string().optional(), order: z.string().optional(), size: z.number().int().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
};

/**
 * Query for historic variable instances
 * 
 * POST /cmmn-query/historic-variable-instances
 */
export const createApiCmmnQueryHistoricVariableInstances = async (args: CreateApiCmmnQueryHistoricVariableInstancesArgs, options: CreateApiCmmnQueryHistoricVariableInstancesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.sort != null) query.append("sort", String(args.sort))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/cmmn-query/historic-variable-instances${query.size > 0 ? `?${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(dataResponseHistoricVariableInstanceResponse, await res.json())
};