import {z} from 'zod'

export type AccountTaskStatus = 'todo' | 'dismissed' | 'in-progress' | 'done';

export type AccountTaskTag = 'certificate-of-good-standing' | 'charity-registration' | 'charity-registration-renewal' | 'employee-final-wage-payment' | 'employee-new-hire-reporting' | 'employee-onboarding' | 'employee-termination' | 'exemption' | 'foreign-qualification' | 'initial-statement' | 'local-business-setup' | 'local-payroll-setup' | 'newspaper-publication' | 'notices' | 'payroll-setup' | 'registered-agent' | 'sos-report' | 'setup';

export type GetApiTasksArgs = {definition_id?: (string | null) | undefined, start_date?: (string | null) | undefined, end_date?: (string | null) | undefined, include_managed?: (boolean | null) | undefined, status?: (Array<AccountTaskStatus> | null) | undefined, tags?: (Array<AccountTaskTag> | null) | undefined};

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

export const taskContextEmployee = z.object({scope: z.literal("employee").optional(), employee_id: z.string()});

export const taskContextLegalEntity = z.object({scope: z.literal("legal-entity").optional(), legal_entity_id: z.string()});

export const taskDefinitionType = z.enum(["requirement", "data-collection", "criteria-collection"]);

export const locationRef = z.object({id: z.string(), code: z.string(), name: z.string()});

export const accountTaskDefinition = z.object({id: z.string(), title: z.string(), summary: z.string().nullable().optional(), description: z.string(), type: taskDefinitionType, resources: z.array(z.record(z.string(), z.string())), location: locationRef});

export const actionField = z.object({name: z.string(), description: z.string(), required: z.boolean(), type: z.string()});

export const accountTaskResolutionAction = z.object({type: z.literal("action").optional(), description: z.string(), method: z.string(), url: z.string(), content_type: z.string(), fields: z.array(actionField)});

export const accountTaskAutomationFormSpec = z.object({});

export const accountTaskResolutionAutomate = z.object({type: z.literal("automate").optional(), form_spec: accountTaskAutomationFormSpec, submit_url: z.string(), hosted_url: z.string()});

export const accountTaskResolutionManualStepPath = z.object({type: z.string(), value: z.string(), text: z.string().nullable().optional()});

export const accountTaskResolutionManualStep = z.object({id: z.string(), title: z.string(), description: z.string(), paths: z.array(accountTaskResolutionManualStepPath), order: z.number().int()});

export const accountTaskResolutionManual = z.object({type: z.literal("manual").optional(), steps: z.array(accountTaskResolutionManualStep)});

export const accountTaskResolutionRedirect = z.object({type: z.literal("redirect").optional(), url: z.string()});

export const accountManagedProvider = z.object({id: z.string(), name: z.string()});

export const accountTaskStatus = z.enum(["todo", "dismissed", "in-progress", "done"]);

export const feeFixed = z.object({type: z.literal("fixed").optional(), amount: z.string()});

export const feeRange = z.object({type: z.literal("range").optional(), min: z.string(), max: z.string()});

export const feeVariable = z.object({type: z.literal("variable").optional(), reason: z.string()});

export const eTAUnit = z.enum(["hour", "day", "week", "month"]);

export const accountTaskEstimation = z.object({min: z.number().int(), max: z.number().int(), unit: eTAUnit});

export const accountTaskETA = z.object({estimation: accountTaskEstimation, earliest_date: z.string().nullable().optional(), latest_date: z.string().nullable().optional()});

export const taskPriority = z.enum(["high", "medium", "low"]);

export const accountTaskCriteria = z.object({key: z.string(), reason: z.string(), data: z.union([z.object({}), z.unknown()]).optional()});

export const accountTask = z.object({id: z.string(), context: z.discriminatedUnion("scope", [taskContextEmployee, taskContextLegalEntity]), definition: accountTaskDefinition, resolutions: z.record(z.string(), z.discriminatedUnion("type", [accountTaskResolutionAction, accountTaskResolutionAutomate, accountTaskResolutionManual, accountTaskResolutionRedirect])), default_resolution_name: z.string(), managed_provider: accountManagedProvider.nullable().optional(), status: accountTaskStatus, period_start_date: z.string().nullable().optional(), period_end_date: z.string().nullable().optional(), due_date: z.string().nullable().optional(), unblocks: z.array(accountTaskDefinition), fee: z.union([feeFixed, feeRange, feeVariable]).nullable().optional(), eta: accountTaskETA.nullable().optional(), priority: taskPriority.optional(), criteria_met: z.array(accountTaskCriteria), tags: z.array(z.string()).nullable().optional()});

export const getApiTasksResponse = z.array(accountTask);

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
};

/**
 * List Tasks
 * 
 * GET /tasks
 * 
 * Also accepts auth: OAuth2PasswordBearer
 */
export const getApiTasks = async (args: GetApiTasksArgs, options: GetApiTasksOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2PasswordBearer} = options ?? {}

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

if (args.definition_id != null) query.append("definition_id", String(args.definition_id))
if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (args.include_managed != null) query.append("include_managed", String(args.include_managed))
for (const item of args.status ?? []) query.append("status", String(item))
for (const item of args.tags ?? []) query.append("tags", String(item))
if (OAuth2PasswordBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2PasswordBearer}`)

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