/* B07 상세 설계 도면 목록·단건 API 클라이언트. */

import { API_BASE_URL, API_TIMEOUT_MS } from "@config/config_frontend";

export interface DesignDrawingItem {
  id: string;
  // blank: 아직 내용을 만들지 않은 도면 — 도각만 실려 온다.
  kind: "cover" | "longitudinal" | "cross" | "mass_haul" | "watershed" | "blank";
  label: string;
  chainage_m: number | null;
  confirmed: boolean;
}

export interface CadDrawing {
  entities: Record<string, unknown>[];
  /** 횡단도 측점별 실좌표(m) → 종이(mm) 변환값. 구조물을 같은 자리에 얹는 데 쓴다. */
  cross_placements?: {
    chainage_m: number;
    ox: number;
    oy: number;
    dy: number;
    mm_per_m: number;
    x0: number;
    x1: number;
  }[];
  layers: {
    id: string;
    name: string;
    isVisible: boolean;
    isLocked: boolean;
  }[];
}

export interface DesignDrawingListResponse {
  status: string;
  project_id: string;
  route_id: number;
  drawings: DesignDrawingItem[];
}

/** 수량 산출표 값 (미산정 항목은 null). 백엔드 `_quantity_table`의 키와 대응. */
export type QuantityTable = Record<string, number | null>;

/** 측구 형식별 규격 (B06 엔진 ditch_spec 신구조와 1:1). */
export type DitchSpec =
  | { type: "none" }
  | {
      type: "standard";
      top_width_m: number;
      bottom_width_m: number;
      depth_m: number;
    }
  | { type: "l_type"; width_m: number; depth_m: number };

/** B06에서 지정한 설계(지반정보·계획정보). 횡단도에만 존재. status로 잠정/확정 구분. */
export interface CrossDesignInfo {
  ground_type: "soil" | "ripping_rock" | "blasting_rock";
  geometry_preset: "soil" | "rock";
  section_mode: "left_cut" | "right_cut" | "both_cut" | "both_fill";
  ditch_side: "left" | "right";
  ditch_type?: "standard" | "l_type" | null;
  ditch_enabled?: boolean;
  cut_slope_ratio: number;
  fill_slope_ratio: number;
  roadbed_width_m: number;
  carriageway_width_m?: number;
  cross_slope_pct?: number;
  paved?: boolean;
  ditch: DitchSpec;
  road_edges?: Record<"left" | "right", { offset_m: number; elevation_m: number }>;
  design_elevation_m: number;
  cut_area_m2: number;
  fill_area_m2: number;
  status?: "provisional" | "confirmed";
}

export interface DesignDrawingResponse {
  status: string;
  project_id: string;
  route_id: number;
  id: string;
  // blank: 아직 내용을 만들지 않은 도면 — 도각만 실려 온다.
  kind: "cover" | "longitudinal" | "cross" | "mass_haul" | "watershed" | "blank";
  label: string;
  drawing: CadDrawing;
  confirmed: boolean;
  quantity_table?: QuantityTable | null;
  design?: CrossDesignInfo | null;
}

export interface DesignDrawingConfirmResponse {
  status: string;
  project_id: string;
  id: string;
  confirmed: boolean;
  all_confirmed: boolean;
  design?: CrossDesignInfo | null;
}

async function requestJson<T>(path: string, init: RequestInit = {}): Promise<T> {
  const controller = new AbortController();
  const timeoutId = window.setTimeout(() => controller.abort(), API_TIMEOUT_MS);
  try {
    const response = await fetch(`${API_BASE_URL}${path}`, {
      ...init,
      credentials: "include",
      headers: { "Content-Type": "application/json" },
      signal: controller.signal,
    });
    const payload = (await response.json()) as T & { message?: string };
    if (!response.ok) throw new Error(payload.message ?? `HTTP ${response.status}`);
    return payload;
  } finally {
    window.clearTimeout(timeoutId);
  }
}

export function fetchDesignDrawingList(projectId: string): Promise<DesignDrawingListResponse> {
  return requestJson(`/projects/${projectId}/design-drawings`);
}

export function fetchDesignDrawing(
  projectId: string,
  drawingId: string,
): Promise<DesignDrawingResponse> {
  return requestJson(`/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}`);
}

export function confirmDesignDrawing(
  projectId: string,
  drawingId: string,
  drawing: CadDrawing,
  quantityTable?: QuantityTable | null,
): Promise<DesignDrawingConfirmResponse> {
  return requestJson(
    `/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}/confirm`,
    {
      method: "PUT",
      body: JSON.stringify({ drawing, quantity_table: quantityTable ?? null }),
    },
  );
}

export function invalidateDesignDrawing(projectId: string, drawingId: string): Promise<void> {
  return requestJson(
    `/projects/${projectId}/design-drawings/${encodeURIComponent(drawingId)}/invalidate`,
    { method: "POST" },
  );
}

/** 도각 편집 화면이 싣는 도각 한 장 (실치수 1:1, 잠금 없는 도면층). */
export interface FrameTemplateResponse {
  status: string;
  project_id: string;
  drawing: CadDrawing;
  /** 회사가 고친 도각을 쓰고 있으면 true, 프로그램 기본 도각이면 false. */
  customized: boolean;
}

export function fetchFrameTemplate(projectId: string): Promise<FrameTemplateResponse> {
  return requestJson(`/projects/${projectId}/frame-template`);
}

export function saveFrameTemplate(projectId: string, drawing: CadDrawing): Promise<void> {
  return requestJson(`/projects/${projectId}/frame-template`, {
    method: "PUT",
    body: JSON.stringify({ drawing }),
  });
}

/** 회사 도각을 지우고 프로그램 기본 도각으로 되돌린다. */
export function resetFrameTemplate(projectId: string): Promise<void> {
  return requestJson(`/projects/${projectId}/frame-template`, {
    method: "DELETE",
  });
}