/* =============================================================================
 * B04_wf1_Surface_Api_Fetch.ts
 * 1차 워크플로우(지표면 분석) API 클라이언트
 *
 * 백엔드 계약 (B04_wf1_Surface_Router.py):
 *   POST /api/projects/{project_id}/surface/analyze  → 분석 실행 + DB 기록
 *   GET  /api/projects/{project_id}/surface/models    → 모델 목록 조회
 *
 * 규칙:
 *   - 모든 제어 상수는 config_frontend에서 참조 (하드코딩 금지).
 *   - 오류 응답 형식 {status:"error", message:"..."}을 Error로 변환.
 * ========================================================================== */

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

/** 지표면 분석 실행 요청 (SurfaceAnalyzeRequest) */
export interface SurfaceAnalyzeRequest {
  input_file_id: number;
  source_filters?: string[];
  methods?: string[];
  force?: boolean;
}

/** 지표면 분석 실행 결과 (SurfaceAnalyzeResponse) */
export interface SurfaceAnalyzeResponse {
  status: string;
  project_id: string;
  ground_summary: Record<string, unknown>;
  manifest_status: string;
  surface_model_ids: number[];
}

/** 저장된 지표면 모델 요약 (SurfaceModelSummary) */
export interface SurfaceModelSummary {
  id: number;
  model_type: string;
  status: string;
  resolution_m: number | null;
  model_file_path: string | null;
  created_at: string | null;
}

export interface SurfaceInputFileSummary {
  id: number;
  file_type: string;
  original_filename: string;
  raw_file_path: string;
  file_size_mb: number | null;
  crs_epsg: number | null;
  status: string | null;
  created_at: string | null;
}

export interface SurfaceInputFileListResponse {
  status: string;
  project_id: string;
  files: SurfaceInputFileSummary[];
}

export interface SurfacePointCloudSampleResponse {
  status: string;
  project_id: string;
  point_count: number;
  sampled_count: number;
  bounds: Record<string, number>;
  points: [number, number, number][];
  rgb?: [number, number, number][];
}

export interface SurfaceGroundStatsResponse {
  status: string;
  project_id: string;
  filters: Record<string, Record<string, unknown>>;
}

export interface SurfaceStatusResponse {
  project_id: string;
  status: "pending" | "in_progress" | "completed" | "failed";
  model_count: number;
  progress_percent: number;
  current_stage: string;
  message: string;
}

/** 지표면 모델 목록 응답 (SurfaceModelListResponse) */
export interface SurfaceModelListResponse {
  status: string;
  project_id: string;
  models: SurfaceModelSummary[];
}

/** 공통 fetch 헬퍼: 타임아웃 + 인증 헤더 + 오류 응답 변환. */
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",
        ...(init.headers ?? {}),
      },
      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);
  }
}

/** 지표면 분석을 실행한다 (LAS 구조화 → 지면 필터 → 지표면 모델 생성). */
export async function analyzeSurface(
  projectId: string,
  request: SurfaceAnalyzeRequest,
): Promise<SurfaceAnalyzeResponse> {
  return requestJson<SurfaceAnalyzeResponse>(`/projects/${projectId}/surface/analyze`, {
    method: "POST",
    body: JSON.stringify(request),
  });
}

/** 프로젝트의 지표면 모델 목록을 조회한다. */
export async function listSurfaceModels(projectId: string): Promise<SurfaceModelListResponse> {
  return requestJson<SurfaceModelListResponse>(`/projects/${projectId}/surface/models`, {
    method: "GET",
  });
}

export async function listSurfaceInputFiles(
  projectId: string,
): Promise<SurfaceInputFileListResponse> {
  return requestJson<SurfaceInputFileListResponse>(`/projects/${projectId}/surface/input-files`, {
    method: "GET",
  });
}

export async function fetchSurfacePointCloud(
  projectId: string,
): Promise<SurfacePointCloudSampleResponse> {
  return requestJson<SurfacePointCloudSampleResponse>(
    `/projects/${projectId}/surface/point-cloud`,
    {
      method: "GET",
    },
  );
}

export async function fetchSurfaceGroundStats(
  projectId: string,
): Promise<SurfaceGroundStatsResponse> {
  return requestJson<SurfaceGroundStatsResponse>(`/projects/${projectId}/surface/ground-stats`, {
    method: "GET",
  });
}

export async function fetchSurfaceStatus(projectId: string): Promise<SurfaceStatusResponse> {
  return requestJson<SurfaceStatusResponse>(`/projects/${projectId}/surface/status`, {
    method: "GET",
  });
}