import {z} from 'zod'

export type FormRequest = {formInstanceId?: string | undefined, formDefinitionId?: string | undefined, formDefinitionKey?: string | undefined, taskId?: string | undefined, processInstanceId?: string | undefined, processDefinitionId?: string | undefined, scopeId?: string | undefined, scopeType?: string | undefined, scopeDefinitionId?: string | undefined, outcome?: string | undefined, tenantId?: string | undefined, parentDeploymentId?: string | undefined, variables?: {[key: string]: Record<string, never>} | undefined};

export type CreateApiFormFormInstanceModelArgs = {body: FormRequest};

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

export const rowDefinition = z.object({cols: z.array(z.record(z.string(), z.object({}))).optional()});

export const metadataDefinition = z.object({key: z.string().optional(), name: z.string().optional(), description: z.string().optional(), version: z.string().optional(), modelType: z.string().optional(), flowableDesignVersion: z.number().int().optional()});

export const sectionDefinition = z.object({name: z.string().optional(), visibility: z.string().optional()});

export const outcomeDefinition = z.object({label: z.string().optional(), value: z.string().optional(), visible: z.string().optional(), enabled: z.string().optional(), primary: z.string().optional(), ignorePayload: z.boolean().optional(), ignoreValidation: z.boolean().optional(), hideErrors: z.boolean().optional(), styleClass: z.string().optional(), navigationUrl: z.string().optional(), outcomeFormKey: z.string().optional(), i18n: z.record(z.string(), z.record(z.string(), z.string())).optional()});

export const customValidationDefinition = z.object({expression: z.string().optional(), errorMsg: z.string().optional(), i18n: z.record(z.string(), z.record(z.string(), z.string())).optional()});

export const formInstanceModelResponse = z.object({id: z.string().optional(), name: z.string().optional(), description: z.string().optional(), key: z.string().optional(), version: z.number().int().optional(), formInstanceId: z.string().optional(), submittedBy: z.string().optional(), submittedDate: z.string().optional(), selectedOutcome: z.string().optional(), taskId: z.string().optional(), processInstanceId: z.string().optional(), processDefinitionId: z.string().optional(), tenantId: z.string().optional(), url: z.string().optional(), formKey: z.string().optional(), dialogSize: z.string().optional(), dialogTitle: z.string().optional(), dialogDescription: z.string().optional(), forceValidation: z.boolean().optional(), defaultDateFormat: z.string().optional(), defaultNumberFormat: z.string().optional(), rows: z.array(rowDefinition).optional(), metadata: metadataDefinition.optional(), section: sectionDefinition.optional(), outcomes: z.array(outcomeDefinition).optional(), customValidations: z.array(customValidationDefinition).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
};

/**
 * Get a form instance model
 * 
 * POST /form/form-instance-model
 */
export const createApiFormFormInstanceModel = async (args: CreateApiFormFormInstanceModelArgs, options?: CreateApiFormFormInstanceModelOptions) => {
const {baseUrl = "http://localhost:8090/form-api", 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 (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

const url = `${baseUrl.replace(/\/+$/, '')}/form/form-instance-model${query.size > 0 ? `?${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(formInstanceModelResponse, await res.json())
};