import {z} from 'zod'

export type DayPosition = 'firstHalf' | 'secondHalf' | 'fullDay';

export type ShiftOverrideDuration = {unit: 'days' | 'hours', value: number, iso: string};

export type ShiftOverrideNature = 'worked' | 'off' | 'partTime' | 'weeklyRest';

export type ShiftOverrideCandidate = {employeeId: number, position: DayPosition, startsAt: string, duration: ShiftOverrideDuration, nature: ShiftOverrideNature, comment?: (string | null) | undefined};

export type UpdateApiScheduleApiShiftOverridesArgs = {'employee.id': number, 'startsAt.between': string, body: Array<ShiftOverrideCandidate>};

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

export const dayPosition = z.enum(["firstHalf", "secondHalf", "fullDay"]);

export const shiftOverrideDuration = z.object({unit: z.enum(["days", "hours"]), value: z.number().gte(0), iso: z.string()});

export const shiftOverrideEventUnit = z.enum(["day", "hour", "time"]);

export const shiftOverrideNature = z.enum(["worked", "off", "partTime", "weeklyRest"]);

export const shiftOverride = z.object({id: z.number().int().gte(0), employee: z.object({id: z.number().int().gte(0).optional()}), position: dayPosition, startsAt: z.string(), endsAt: z.string(), duration: shiftOverrideDuration, workCycleUnit: shiftOverrideEventUnit, nature: shiftOverrideNature, comment: z.string().nullable().optional(), isLocked: z.boolean(), createdAt: z.string(), createdBy: z.object({id: z.number().int().gte(0).optional()}).nullable().optional(), lastUpdatedAt: z.string(), lastUpdatedBy: z.object({id: z.number().int().gte(0).optional()}).nullable().optional()});

export const updateApiScheduleApiShiftOverridesResponse = z.object({items: z.array(shiftOverride).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
};

/**
 * Replace ShiftOverrides for an employee.
 * 
 * PUT /schedule/api/shift-overrides
 */
export const updateApiScheduleApiShiftOverrides = async (args: UpdateApiScheduleApiShiftOverridesArgs, options?: UpdateApiScheduleApiShiftOverridesOptions) => {
const {baseUrl = "https://example.ilucca.net", fetch: fetchFn = fetch} = options ?? {}

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

if (args['employee.id'] != null) query.append("employee.id", String(args['employee.id']))
if (args['startsAt.between'] != null) query.append("startsAt.between", String(args['startsAt.between']))

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

const res = await fetchFn(url, {method: "PUT", 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(updateApiScheduleApiShiftOverridesResponse, await res.json())
};