import { ASSIGNEE_FILTER_UNASSIGNED } from "@/domain/work-orders/types/work-order-list";
import {
  EMPTY_ADVANCED_FILTERS,
  type WorkOrderAdvancedFilters,
} from "@/domain/work-orders/types/work-order-advanced-filters";
import type { WorkOrderBarFilters } from "@/domain/work-orders/types/work-order-list-filters";
import {
  BOARD_DISPATCHER_UNASSIGNED,
  DATE_RANGE_TO_PRESET,
  DOC_STATUS_API,
  LIFECYCLE_STATUS_API,
  NON_TERMINAL_LIFECYCLE_STATUSES,
  type WorkOrderBoardQueryParams,
  type WorkOrderBoardSearchQueryParams,
} from "@/domain/work-orders/types/work-order-board";
import { mapWizardTypeToApi } from "@/domain/work-orders/mappers/work-order-board-mapper";
import { weekRange } from "@/domain/work-orders/utils/list-week-utils";
import type { CompletionDocFilter } from "@/domain/work-orders/types/work-order-advanced-filters";
import type { WizardWOStatus, WOType } from "@/domain/work-orders/types/work-order-wizard";

export const BOARD_SEARCH_MAX_PAGE_SIZE = 200;

/** Wide Custom window so applied advanced search is not pinned to ThisWeek. */
export const ADVANCED_SEARCH_ALL_WEEKS_FROM = "2000-01-01";
export const ADVANCED_SEARCH_ALL_WEEKS_TO = "2099-12-31";

/**
 * Wide Custom window for SH-165. GET /board/search defaults omitted
 * `datePreset` to ThisWeek (`WorkOrderSearchDateRangeResolver`), which would
 * hide scheduled-unassigned WOs outside the current week.
 */
export const UNASSIGNED_QUEUE_DATE_FROM = "1970-01-01";
export const UNASSIGNED_QUEUE_DATE_TO = "2099-12-31";

function toBoardDispatcherId(id: string): string {
  if (id === ASSIGNEE_FILTER_UNASSIGNED || id === BOARD_DISPATCHER_UNASSIGNED) {
    return BOARD_DISPATCHER_UNASSIGNED;
  }
  return id;
}

function mapDispatchers(ids: Iterable<string>): string[] | undefined {
  const list = [...ids].map(toBoardDispatcherId);
  return list.length > 0 ? list : undefined;
}

/** Maps UI type filters to API `types` + separate `overdue` flag. Overdue is never sent as types=99. */
function mapWoTypeFilters(types: Iterable<WOType | string>): {
  types?: number[];
  overdue?: boolean;
} {
  const list: number[] = [];
  let overdue = false;
  for (const type of types) {
    if (type === "All") {
      continue;
    }
    if (type === "Overdue") {
      overdue = true;
      continue;
    }
    const api = mapWizardTypeToApi(type as WOType);
    if (api != null) {
      list.push(api);
    }
  }
  return {
    types: list.length > 0 ? list : undefined,
    overdue: overdue || undefined,
  };
}

function mapStatuses(statuses: Iterable<WizardWOStatus | string>): number[] | undefined {
  const list: number[] = [];
  for (const status of statuses) {
    const value = LIFECYCLE_STATUS_API[status as WizardWOStatus];
    if (typeof value === "number") {
      list.push(value);
    } else if (status === "Canceled" || status === "Cancelled") {
      list.push(LIFECYCLE_STATUS_API.Canceled);
    }
  }
  return list.length > 0 ? list : undefined;
}

function mapDocStatuses(docs: Iterable<CompletionDocFilter>): number[] | undefined {
  const list: number[] = [];
  for (const doc of docs) {
    if (doc === "Yes") list.push(DOC_STATUS_API.Yes);
    else if (doc === "No") list.push(DOC_STATUS_API.No);
    else if (doc === "NN") list.push(DOC_STATUS_API.NotNeeded);
  }
  return list.length > 0 ? list : undefined;
}

function resolveVendorIds(
  vendorTechs: Iterable<string>,
  vendorIdsByCompanyName?: Map<string, number>,
): number[] | undefined {
  if (!vendorIdsByCompanyName) return undefined;
  const vendorIds: number[] = [];
  for (const name of vendorTechs) {
    const id = vendorIdsByCompanyName.get(name);
    if (typeof id === "number") {
      vendorIds.push(id);
    }
  }
  return vendorIds.length > 0 ? vendorIds : undefined;
}

function mapSearchFacetParams(
  filters: WorkOrderAdvancedFilters,
): Pick<
  WorkOrderBoardSearchQueryParams,
  | "severities"
  | "rescheduled"
  | "carriedOver"
  | "addOn"
  | "avetaOnly"
  | "flagColors"
  | "internalOnly"
  | "hasUplift"
  | "upliftStatuses"
> {
  return {
    severities: filters.severities?.size ? [...filters.severities] : undefined,
    rescheduled: filters.rescheduled || undefined,
    carriedOver: filters.carriedOver || undefined,
    addOn: filters.addOn || undefined,
    avetaOnly: filters.avetaOnly || undefined,
    flagColors: filters.flagColors?.size ? [...filters.flagColors] : undefined,
    internalOnly: filters.internalOnly || undefined,
    hasUplift: filters.hasUplift || undefined,
    upliftStatuses:
      filters.hasUplift && filters.upliftStatuses?.size ? [...filters.upliftStatuses] : undefined,
  };
}

/** Build GET /board query from weekly filter bar. */
export function toBoardQueryParams(
  bar: WorkOrderBarFilters,
  search: string,
): WorkOrderBoardQueryParams {
  const [, weekTo] = weekRange(bar.weekMonday);
  const typeFilters = bar.types.size > 0 ? mapWoTypeFilters(bar.types) : {};

  return {
    weekStart: bar.weekMonday,
    weekEnd: weekTo,
    dispatchers: mapDispatchers(bar.dispatcherIds),
    types: typeFilters.types,
    overdue: typeFilters.overdue,
    search: search.trim().length >= 2 ? search.trim() : undefined,
  };
}

function resolveAdvancedSearchDate(filters: WorkOrderAdvancedFilters): {
  datePreset?: WorkOrderBoardSearchQueryParams["datePreset"];
  dateFrom?: string;
  dateTo?: string;
} {
  // SH-338: server-side unscheduledOnly owns the date-range exemption; the
  // client must not fake a Custom window and sends no date params.
  if (filters.unscheduledOnly) {
    return {};
  }
  if (filters.dateRange === EMPTY_ADVANCED_FILTERS.dateRange) {
    return {
      datePreset: "Custom",
      dateFrom: ADVANCED_SEARCH_ALL_WEEKS_FROM,
      dateTo: ADVANCED_SEARCH_ALL_WEEKS_TO,
    };
  }

  const datePreset = DATE_RANGE_TO_PRESET[filters.dateRange];
  if (datePreset === "Custom") {
    return {
      datePreset,
      dateFrom: filters.customFrom || undefined,
      dateTo: filters.customTo || undefined,
    };
  }

  return { datePreset };
}

/** Build GET /board/search query from advanced filters (+ optional bar/search). */
export function toBoardSearchQueryParams(input: {
  filters: WorkOrderAdvancedFilters;
  search?: string;
  page?: number;
  pageSize?: number;
  sortBy?: string;
  sortDir?: string;
  /** Optional company-name → vendorId resolution. */
  vendorIdsByCompanyName?: Map<string, number>;
}): WorkOrderBoardSearchQueryParams {
  const { filters } = input;
  const date = resolveAdvancedSearchDate(filters);
  const pageSize = Math.min(
    input.pageSize ?? BOARD_SEARCH_MAX_PAGE_SIZE,
    BOARD_SEARCH_MAX_PAGE_SIZE,
  );

  const typeFilters = mapWoTypeFilters(filters.types);
  const trimmedSearch = input.search?.trim();
  const search = trimmedSearch && trimmedSearch.length >= 2 ? trimmedSearch : undefined;

  return {
    page: input.page ?? 0,
    pageSize,
    search,
    datePreset: date.datePreset,
    dateFrom: date.dateFrom,
    dateTo: date.dateTo,
    sites: filters.sites.size > 0 ? [...filters.sites] : undefined,
    types: typeFilters.types,
    overdue: typeFilters.overdue,
    dispatchers: mapDispatchers(filters.dispatchers),
    regions: filters.regions.size > 0 ? [...filters.regions] : undefined,
    statuses: mapStatuses(filters.statuses),
    pmTypes: filters.pmTypes.size > 0 ? [...filters.pmTypes] : undefined,
    vendorIds: resolveVendorIds(filters.vendorTechs, input.vendorIdsByCompanyName),
    docStatuses: mapDocStatuses(filters.docs),
    unscheduledOnly: filters.unscheduledOnly || undefined,
    ...mapSearchFacetParams(filters),
    sortBy: input.sortBy || "scheduledDate",
    sortDir: input.sortDir === "desc" ? "desc" : "asc",
  };
}

/** ky/URLSearchParams-friendly object; arrays become repeated keys. */
export function buildBoardSearchParamsRecord(
  params: WorkOrderBoardQueryParams | WorkOrderBoardSearchQueryParams,
): Record<string, string | number | boolean | (string | number)[]> {
  const out: Record<string, string | number | boolean | (string | number)[]> = {};

  for (const [key, value] of Object.entries(params)) {
    if (value === undefined || value === null || value === "") {
      continue;
    }
    if (Array.isArray(value)) {
      if (value.length === 0) continue;
      out[key] = value;
      continue;
    }
    out[key] = value as string | number | boolean;
  }

  return out;
}

export function woTypeFilterIsOverdue(type: string): boolean {
  return type === "Overdue";
}

/** Week-independent GET /board/search params for the pinned Unassigned queue. */
export function toUnassignedQueueQueryParams(
  page = 0,
  pageSize = BOARD_SEARCH_MAX_PAGE_SIZE,
): WorkOrderBoardSearchQueryParams {
  return {
    page,
    pageSize: Math.min(pageSize || BOARD_SEARCH_MAX_PAGE_SIZE, BOARD_SEARCH_MAX_PAGE_SIZE),
    dispatchers: [BOARD_DISPATCHER_UNASSIGNED],
    statuses: [...NON_TERMINAL_LIFECYCLE_STATUSES],
    datePreset: "Custom",
    dateFrom: UNASSIGNED_QUEUE_DATE_FROM,
    dateTo: UNASSIGNED_QUEUE_DATE_TO,
  };
}