import { DOC_STATUS_API } from "@/domain/work-orders/types/work-order-board";
import type {
  BoardMediaCategory,
  WorkOrderBoardCompletion,
  WorkOrderBoardDetail,
  WorkOrderBoardMediaItem,
} from "@/domain/work-orders/types/work-order-board-detail";
import { BOARD_MEDIA_CATEGORY_API } from "@/domain/work-orders/types/work-order-board-detail";
import type { CompletionDocStatus } from "@/domain/work-orders/types/work-order-table-row";
import type {
  WorkOrderAuditEntry,
  WorkOrderComment,
} from "@/domain/work-orders/types/work-order-detail";
import { mapWorkOrderTableRow } from "@/domain/work-orders/mappers/work-order-mapper";
import type {
  FileCategory,
  MediaCategory,
  MediaFile,
} from "@/domain/work-orders/types/work-order-media";

function asRecord(raw: unknown): Record<string, unknown> {
  return typeof raw === "object" && raw !== null ? (raw as Record<string, unknown>) : {};
}

function readString(record: Record<string, unknown>, ...keys: string[]): string {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "string") {
      return value;
    }
    if (typeof value === "number" || typeof value === "boolean") {
      return String(value);
    }
  }
  return "";
}

function readNumber(record: Record<string, unknown>, ...keys: string[]): number | null {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "number" && Number.isFinite(value)) {
      return value;
    }
    if (typeof value === "string" && value.trim() !== "") {
      const parsed = Number(value);
      if (Number.isFinite(parsed)) {
        return parsed;
      }
    }
  }
  return null;
}

function readBoolean(record: Record<string, unknown>, ...keys: string[]): boolean {
  for (const key of keys) {
    const value = record[key];
    if (typeof value === "boolean") {
      return value;
    }
  }
  return false;
}

function readStringArray(record: Record<string, unknown>, ...keys: string[]): string[] {
  for (const key of keys) {
    const value = record[key];
    if (!Array.isArray(value)) {
      continue;
    }

    const mapped = value
      .map((entry) => {
        if (typeof entry === "string") {
          return entry;
        }
        if (typeof entry === "number" || typeof entry === "boolean") {
          return String(entry);
        }
        return "";
      })
      .filter(Boolean);

    if (mapped.length > 0) {
      return mapped;
    }
  }

  return [];
}

function mapDocStatus(raw: unknown): CompletionDocStatus {
  const numeric = typeof raw === "number" ? raw : Number(raw);
  if (numeric === DOC_STATUS_API.Yes) return "Yes";
  if (numeric === DOC_STATUS_API.No) return "No";
  if (numeric === DOC_STATUS_API.NotNeeded) return "NN";
  if (raw === "Yes" || raw === "No" || raw === "NN") return raw;
  if (raw === "NotNeeded") return "NN";
  return "";
}

function mapMediaCategory(raw: unknown): BoardMediaCategory {
  const numeric = typeof raw === "number" ? raw : Number(raw);
  if (numeric === BOARD_MEDIA_CATEGORY_API.Before) return "Before";
  if (numeric === BOARD_MEDIA_CATEGORY_API.After) return "After";
  if (numeric === BOARD_MEDIA_CATEGORY_API.Extra) return "Extra";
  if (numeric === BOARD_MEDIA_CATEGORY_API.Completion) return "Completion";
  return "Extra";
}

export function mapBoardDetailComment(raw: unknown): WorkOrderComment {
  const item = asRecord(raw);
  const id = readNumber(item, "id");
  const authorId = readString(item, "authorId", "AuthorId") || null;
  return {
    id: id ?? (readString(item, "id") || `comment-${readString(item, "time")}`),
    createdDate: readString(item, "time", "createdDate", "CreatedDate"),
    commenttext: readString(item, "text", "commenttext", "Commenttext"),
    commentType: readString(item, "commentType", "CommentType") || "internal",
    userName: readString(item, "userName", "UserName", "authorName", "AuthorName"),
    authorId,
    commenter: readString(item, "commenter", "Commenter") || null,
    recordType: readString(item, "recordType", "RecordType") || null,
    mentions: readStringArray(item, "mentions", "Mentions"),
  };
}

export function mapBoardDetailAuditEntry(raw: unknown, index: number): WorkOrderAuditEntry {
  const item = asRecord(raw);
  const time = readString(item, "time", "createdAt", "CreatedAt");
  const typeRaw = readString(item, "type", "Type").toLowerCase();
  const type: "manual" | "system" = typeRaw === "system" ? "system" : "manual";
  const dispatcherId = readString(item, "dispatcherId", "DispatcherId");
  const userName = readString(item, "userName", "UserName");

  return {
    id: `${time || "audit"}-${index}`,
    fieldName: readString(item, "fieldName", "FieldName"),
    oldValue: readString(item, "oldValue", "OldValue"),
    newValue: readString(item, "newValue", "NewValue"),
    action: readString(item, "action", "Action"),
    createdAt: time,
    userName: type === "system" ? "System" : userName,
    type,
    dispatcherId: dispatcherId || undefined,
  };
}

export type UploadableMediaCategory = "Before" | "After" | "Extra";

export function buildMediaFormData(file: File, category?: UploadableMediaCategory): FormData {
  const form = new FormData();
  if (category) {
    form.append("category", category);
  }
  form.append("file", file);
  return form;
}

export function buildCompletionDocFormData(params: {
  file: File;
  workOrderVersion: string;
  signOffName?: string;
  signOffSignature?: string;
}): FormData {
  const form = new FormData();
  form.append("file", params.file);
  form.append("workOrderVersion", params.workOrderVersion);
  if (params.signOffName) {
    form.append("signOffName", params.signOffName);
  }
  if (params.signOffSignature) {
    form.append("signOffSignature", params.signOffSignature);
  }
  return form;
}

export function mapCompletion(raw: unknown): WorkOrderBoardCompletion {
  const item = asRecord(raw);
  const templateRaw = item.template ?? item.Template;
  const templateRecord = templateRaw != null ? asRecord(templateRaw) : null;
  const signoffsRaw = item.dispatchSignoffs ?? item.DispatchSignoffs;
  const signoffs = Array.isArray(signoffsRaw)
    ? signoffsRaw.map((entry) => {
        const s = asRecord(entry);
        return {
          dispatchId: readNumber(s, "dispatchId", "DispatchId"),
          signoffType: readString(s, "signoffType", "SignoffType"),
          name: readString(s, "name", "Name"),
          signedAt: readString(s, "signedAt", "SignedAt"),
        };
      })
    : [];

  return {
    docStatus: mapDocStatus(item.docStatus ?? item.DocStatus),
    template: templateRecord
      ? {
          id: readNumber(templateRecord, "id", "Id") ?? 0,
          name: readString(templateRecord, "name", "Name"),
          serviceKey: readString(templateRecord, "serviceKey", "ServiceKey"),
          workOrderType: readNumber(templateRecord, "workOrderType", "WorkOrderType"),
          templateUrl: readString(templateRecord, "templateUrl", "TemplateUrl"),
          isActive: readBoolean(templateRecord, "isActive", "IsActive"),
        }
      : null,
    signOffName: readString(item, "signOffName", "SignOffName"),
    signOffAttachment: readString(item, "signOffAttachment", "SignOffAttachment"),
    signOffSignature: readString(item, "signOffSignature", "SignOffSignature"),
    dispatchSignoffs: signoffs,
  };
}

export function mapBoardDetailMediaItem(raw: unknown): WorkOrderBoardMediaItem {
  const item = asRecord(raw);
  const id = readNumber(item, "id");
  const isLegacyFlag = readBoolean(item, "isLegacy", "IsLegacy");
  return {
    id: String(id ?? (readString(item, "id") || cryptoRandomId())),
    category: mapMediaCategory(item.category ?? item.Category),
    url: readString(item, "url", "Url"),
    fileName: readString(item, "fileName", "FileName") || "file",
    uploadedAt: readString(item, "uploadedAt", "UploadedAt"),
    isLegacy: isLegacyFlag || (id != null && id <= 0),
  };
}

function cryptoRandomId(): string {
  return `media-${Date.now()}-${Math.random().toString(36).slice(2, 9)}`;
}

function classifyFileName(fileName: string, url: string): FileCategory {
  const name = `${fileName} ${url}`.toLowerCase();
  if (/\.(jpe?g|png|gif|webp|bmp)(\?|$)/i.test(name) || name.includes("image/")) {
    return "image";
  }
  if (/\.(mp4|mov|webm|m4v)(\?|$)/i.test(name) || name.includes("video/")) {
    return "video";
  }
  if (/\.pdf(\?|$)/i.test(name)) {
    return "pdf";
  }
  if (/\.(docx?|xlsx?|pptx?)(\?|$)/i.test(name)) {
    return "doc";
  }
  return "other";
}

function boardCategoryToMediaCategory(category: BoardMediaCategory): MediaCategory {
  if (category === "Extra") return "Other";
  if (category === "Completion") return "Report";
  return "Photo";
}

/** Adapt board detail media items for existing MediaUploader / Extras UI. */
export function boardMediaItemsToMediaFiles(items: WorkOrderBoardMediaItem[]): MediaFile[] {
  return items.map((item) => ({
    id: item.id,
    name: item.fileName,
    fileType: classifyFileName(item.fileName, item.url),
    url: item.url,
    category: boardCategoryToMediaCategory(item.category),
    purpose: item.category,
    isLegacy: item.isLegacy || Number(item.id) <= 0,
    uploadStatus: "done" as const,
  }));
}

export function mapWorkOrderBoardDetail(raw: unknown): WorkOrderBoardDetail {
  const root = asRecord(raw);
  const infoRaw = root.info ?? root.Info ?? root;
  const commentsRaw = root.comments ?? root.Comments;
  const auditRaw = root.audit ?? root.Audit;
  const mediaRaw = root.media ?? root.Media;
  const completionRaw = root.completion ?? root.Completion;

  const comments = Array.isArray(commentsRaw) ? commentsRaw.map(mapBoardDetailComment) : [];
  const audit = Array.isArray(auditRaw)
    ? auditRaw.map((entry, index) => mapBoardDetailAuditEntry(entry, index))
    : [];
  const media = Array.isArray(mediaRaw) ? mediaRaw.map(mapBoardDetailMediaItem) : [];

  return {
    info: mapWorkOrderTableRow(infoRaw),
    completion: mapCompletion(completionRaw ?? {}),
    comments,
    audit,
    media,
  };
}