"""
config_system.py
백엔드 작동 제어 및 알고리즘 파라미터

모든 제어 변수는 여기서 관리. 코드 내 하드코딩 금지.
"""

import os
from pathlib import Path

from dotenv import load_dotenv

PROJECT_ROOT = Path(__file__).resolve().parent.parent
load_dotenv(PROJECT_ROOT / ".env")
os.environ["PYTHONUTF8"] = "1"
# ─────────────────────────────────────────────────────────────────────────
# 1. FastAPI 서버
# ─────────────────────────────────────────────────────────────────────────
SERVER_HOST = os.getenv("SERVER_HOST", "0.0.0.0")
SERVER_PORT = int(os.getenv("SERVER_PORT", "8000"))
DEBUG = os.getenv("DEBUG", "False").lower() == "true"

# 정적 파일 서빙 (프론트엔드 빌드 결과)
STATIC_DIR = os.path.join(os.path.dirname(os.path.dirname(__file__)), "node_modules", ".build")
STATIC_URL = "/static"

# ─────────────────────────────────────────────────────────────────────────
# 2. 로깅
# ─────────────────────────────────────────────────────────────────────────
LOG_LEVEL = os.getenv("LOG_LEVEL", "INFO")

# ─────────────────────────────────────────────────────────────────────────
# 3. 데이터베이스 (MariaDB)
# ─────────────────────────────────────────────────────────────────────────
DB_HOST = os.getenv("DB_HOST", "localhost")
DB_PORT = int(os.getenv("DB_PORT", "3306"))
DB_NAME = os.getenv("DB_NAME", "aislo_db")
DB_USER = os.getenv("DB_USER", "aislo")
DB_PASSWORD = os.getenv("DB_PASSWORD", "aislo")

# asyncmy 연결 풀 설정
DB_POOL_MIN = int(os.getenv("DB_POOL_MIN", "5"))
DB_POOL_MAX = int(os.getenv("DB_POOL_MAX", "20"))

# ─────────────────────────────────────────────────────────────────────────
# 4. 파일 업로드 제한
# ─────────────────────────────────────────────────────────────────────────
UPLOAD_MAX_MB = int(os.getenv("UPLOAD_MAX_MB", "500"))
UPLOAD_MAX_FILES = int(os.getenv("UPLOAD_MAX_FILES", "20"))
UPLOAD_CHUNK_SIZE_BYTES = int(os.getenv("UPLOAD_CHUNK_SIZE_BYTES", str(1024 * 1024)))
UPLOAD_ALLOWED_EXT = [".las", ".laz", ".dem", ".tif", ".tiff", ".tfw", ".prj", ".dxf", ".dwg"]

# ─────────────────────────────────────────────────────────────────────────
# 5. 지형 분석 알고리즘 파라미터
# ─────────────────────────────────────────────────────────────────────────
# Trimesh 메쉬 생성
MESH_GRID_SIZE = float(os.getenv("MESH_GRID_SIZE", "1.0"))  # 미터 단위
MESH_SMOOTHING_ITERATIONS = int(os.getenv("MESH_SMOOTHING_ITERATIONS", "0"))
SURFACE_LAS_CHUNK_SIZE = int(os.getenv("SURFACE_LAS_CHUNK_SIZE", "500000"))
SURFACE_DEFAULT_RGB_VALUE = int(os.getenv("SURFACE_DEFAULT_RGB_VALUE", "128"))
SURFACE_GRID_CELL_SIZE_M = float(os.getenv("SURFACE_GRID_CELL_SIZE_M", "2.0"))
SURFACE_GRID_HEIGHT_THRESHOLD_M = float(os.getenv("SURFACE_GRID_HEIGHT_THRESHOLD_M", "1.5"))

# CSF (Cloth Simulation Filter) 지면 분류 파라미터
SURFACE_CSF_CLOTH_RESOLUTION_M = float(os.getenv("SURFACE_CSF_CLOTH_RESOLUTION_M", "1.5"))
SURFACE_CSF_RIGIDNESS = int(os.getenv("SURFACE_CSF_RIGIDNESS", "1"))
SURFACE_CSF_TIME_STEP = float(os.getenv("SURFACE_CSF_TIME_STEP", "0.65"))
SURFACE_CSF_CLASS_THRESHOLD_M = float(os.getenv("SURFACE_CSF_CLASS_THRESHOLD_M", "0.5"))
SURFACE_CSF_ITERATIONS = int(os.getenv("SURFACE_CSF_ITERATIONS", "150"))
SURFACE_CSF_SLOPE_SMOOTH = os.getenv("SURFACE_CSF_SLOPE_SMOOTH", "True").lower() == "true"
SURFACE_CSF_SLOPE_SMOOTH_THRESHOLD_M = float(
    os.getenv("SURFACE_CSF_SLOPE_SMOOTH_THRESHOLD_M", "1.8")
)

# PMF (Progressive Morphological Filter) 지면 분류 파라미터
SURFACE_PMF_CELL_SIZE_M = float(os.getenv("SURFACE_PMF_CELL_SIZE_M", "2.0"))
SURFACE_PMF_MAX_WINDOW_SIZE = int(os.getenv("SURFACE_PMF_MAX_WINDOW_SIZE", "40"))
SURFACE_PMF_INITIAL_WINDOW_SIZE = int(os.getenv("SURFACE_PMF_INITIAL_WINDOW_SIZE", "3"))
SURFACE_PMF_SLOPE = float(os.getenv("SURFACE_PMF_SLOPE", "1.0"))
SURFACE_PMF_MAX_DISTANCE_M = float(os.getenv("SURFACE_PMF_MAX_DISTANCE_M", "2.5"))

# RANSAC (Local plane fitting) 지면 분류 파라미터
SURFACE_RANSAC_DISTANCE_THRESHOLD_M = float(os.getenv("SURFACE_RANSAC_DISTANCE_THRESHOLD_M", "0.3"))
SURFACE_RANSAC_N = int(os.getenv("SURFACE_RANSAC_N", "3"))
SURFACE_RANSAC_ITERATIONS = int(os.getenv("SURFACE_RANSAC_ITERATIONS", "100"))
SURFACE_RANSAC_LOCAL_GRID_SIZE_M = float(os.getenv("SURFACE_RANSAC_LOCAL_GRID_SIZE_M", "10.0"))
SURFACE_RANSAC_SEED = int(os.getenv("SURFACE_RANSAC_SEED", "42"))

# ─────────────────────────────────────────────────────────────────────────
# 5-2. 지표면 모델 생성 파라미터 (TIN/DTM/NURBS/implicit/meshfree)
# ─────────────────────────────────────────────────────────────────────────
# 빌드 대상 지면 필터·표현 방식
SURFACE_MODEL_SOURCE_FILTERS = tuple(
    os.getenv("SURFACE_MODEL_SOURCE_FILTERS", "grid_min_z,csf,pmf").split(",")
)
SURFACE_MODEL_PRECOMPUTE = tuple(
    os.getenv("SURFACE_MODEL_PRECOMPUTE", "tin,dtm,nurbs,implicit,meshfree").split(",")
)
SURFACE_MODEL_SMOOTHING_METHODS = tuple(
    os.getenv("SURFACE_MODEL_SMOOTHING_METHODS", "dtm,tin").split(",")
)
SURFACE_MODEL_SYNC_TIMEOUT_SECONDS = int(os.getenv("SURFACE_MODEL_SYNC_TIMEOUT_SECONDS", "0"))

# footprint(외곽) 산출
SURFACE_FOOTPRINT_RESOLUTION_M = float(os.getenv("SURFACE_FOOTPRINT_RESOLUTION_M", "1.0"))
SURFACE_FOOTPRINT_GAP_CLOSE_M = float(os.getenv("SURFACE_FOOTPRINT_GAP_CLOSE_M", "1.0"))
SURFACE_BOUNDARY_INSET_M = float(os.getenv("SURFACE_BOUNDARY_INSET_M", "1.0"))
SURFACE_KEEP_LARGEST_FOOTPRINT = (
    os.getenv("SURFACE_KEEP_LARGEST_FOOTPRINT", "True").lower() == "true"
)
SURFACE_TILE_SIZE_M = float(os.getenv("SURFACE_TILE_SIZE_M", "50.0"))
SURFACE_MAX_PREVIEW_VERTICES = int(os.getenv("SURFACE_MAX_PREVIEW_VERTICES", "120000"))

# 표현별 파라미터
SURFACE_TIN_MAX_INPUT_POINTS = int(os.getenv("SURFACE_TIN_MAX_INPUT_POINTS", "200000"))
SURFACE_DTM_GRID_RESOLUTION_M = float(os.getenv("SURFACE_DTM_GRID_RESOLUTION_M", "1.0"))
SURFACE_NURBS_DEGREE = int(os.getenv("SURFACE_NURBS_DEGREE", "3"))
SURFACE_NURBS_PATCH_SIZE_M = float(os.getenv("SURFACE_NURBS_PATCH_SIZE_M", "50.0"))
SURFACE_NURBS_CONTROL_POINTS_PER_AXIS = int(
    os.getenv("SURFACE_NURBS_CONTROL_POINTS_PER_AXIS", "16")
)
SURFACE_IMPLICIT_MAX_POINTS_PER_TILE = int(
    os.getenv("SURFACE_IMPLICIT_MAX_POINTS_PER_TILE", "20000")
)
SURFACE_IMPLICIT_SMOOTHING = float(os.getenv("SURFACE_IMPLICIT_SMOOTHING", "0.5"))
SURFACE_MESHFREE_MAX_MODEL_POINTS = int(os.getenv("SURFACE_MESHFREE_MAX_MODEL_POINTS", "300000"))
SURFACE_MESHFREE_POINT_RADIUS_M = float(os.getenv("SURFACE_MESHFREE_POINT_RADIUS_M", "0.5"))

# 스무딩 파라미터
SURFACE_SMOOTHING_DTM_SIGMA_M = float(os.getenv("SURFACE_SMOOTHING_DTM_SIGMA_M", "0.5"))
SURFACE_SMOOTHING_DTM_SPLINE_SMOOTH = float(os.getenv("SURFACE_SMOOTHING_DTM_SPLINE_SMOOTH", "0.0"))
SURFACE_SMOOTHING_DTM_PREVIEW_RESOLUTION_M = float(
    os.getenv("SURFACE_SMOOTHING_DTM_PREVIEW_RESOLUTION_M", "0.5")
)
SURFACE_SMOOTHING_TIN_TAUBIN_ITERATIONS = int(
    os.getenv("SURFACE_SMOOTHING_TIN_TAUBIN_ITERATIONS", "10")
)
SURFACE_SMOOTHING_TIN_TAUBIN_LAMBDA = float(os.getenv("SURFACE_SMOOTHING_TIN_TAUBIN_LAMBDA", "0.5"))
SURFACE_SMOOTHING_TIN_TAUBIN_MU = float(os.getenv("SURFACE_SMOOTHING_TIN_TAUBIN_MU", "-0.53"))

# 등고선 파라미터
SURFACE_CONTOUR_INTERVAL_M = float(os.getenv("SURFACE_CONTOUR_INTERVAL_M", "5.0"))
SURFACE_CONTOUR_GRID_RESOLUTION_M = float(os.getenv("SURFACE_CONTOUR_GRID_RESOLUTION_M", "1.0"))


def build_surface_model_config() -> dict:
    """지표면 모델 파이프라인이 사용하는 config dict를 조립한다."""
    return {
        "source_filters": list(SURFACE_MODEL_SOURCE_FILTERS),
        "precompute": list(SURFACE_MODEL_PRECOMPUTE),
        "smoothing_methods": tuple(SURFACE_MODEL_SMOOTHING_METHODS),
        "sync_timeout_seconds": SURFACE_MODEL_SYNC_TIMEOUT_SECONDS,
        "footprint_resolution_meters": SURFACE_FOOTPRINT_RESOLUTION_M,
        "footprint_gap_close_meters": SURFACE_FOOTPRINT_GAP_CLOSE_M,
        "boundary_inset_meters": SURFACE_BOUNDARY_INSET_M,
        "keep_largest_footprint": SURFACE_KEEP_LARGEST_FOOTPRINT,
        "tile_size_meters": SURFACE_TILE_SIZE_M,
        "max_preview_vertices": SURFACE_MAX_PREVIEW_VERTICES,
        "tin_max_input_points": SURFACE_TIN_MAX_INPUT_POINTS,
        "dtm_grid_resolution_meters": SURFACE_DTM_GRID_RESOLUTION_M,
        "nurbs_degree": SURFACE_NURBS_DEGREE,
        "nurbs_patch_size_meters": SURFACE_NURBS_PATCH_SIZE_M,
        "nurbs_control_points_per_axis": SURFACE_NURBS_CONTROL_POINTS_PER_AXIS,
        "implicit_max_points_per_tile": SURFACE_IMPLICIT_MAX_POINTS_PER_TILE,
        "implicit_smoothing": SURFACE_IMPLICIT_SMOOTHING,
        "meshfree_max_model_points": SURFACE_MESHFREE_MAX_MODEL_POINTS,
        "meshfree_point_radius_meters": SURFACE_MESHFREE_POINT_RADIUS_M,
        "smoothing_dtm_sigma_meters": SURFACE_SMOOTHING_DTM_SIGMA_M,
        "smoothing_dtm_spline_smooth": SURFACE_SMOOTHING_DTM_SPLINE_SMOOTH,
        "smoothing_dtm_preview_resolution_meters": SURFACE_SMOOTHING_DTM_PREVIEW_RESOLUTION_M,
        "smoothing_tin_taubin_iterations": SURFACE_SMOOTHING_TIN_TAUBIN_ITERATIONS,
        "smoothing_tin_taubin_lambda": SURFACE_SMOOTHING_TIN_TAUBIN_LAMBDA,
        "smoothing_tin_taubin_mu": SURFACE_SMOOTHING_TIN_TAUBIN_MU,
        "contour_interval_meters": SURFACE_CONTOUR_INTERVAL_M,
        "contour_grid_resolution_meters": SURFACE_CONTOUR_GRID_RESOLUTION_M,
    }


# ─────────────────────────────────────────────────────────────────────────
# 5-3. 경로 설계 파라미터 (B05 WF2)
# ─────────────────────────────────────────────────────────────────────────
# 비용 함수 가중치
ROUTE_W_DIST = float(os.getenv("ROUTE_W_DIST", "1.0"))
ROUTE_W_GRADE = float(os.getenv("ROUTE_W_GRADE", "2.0"))
ROUTE_W_SIDE = float(os.getenv("ROUTE_W_SIDE", "1.5"))
ROUTE_W_CURVE = float(os.getenv("ROUTE_W_CURVE", "0.5"))
ROUTE_W_AVOID = float(os.getenv("ROUTE_W_AVOID", "10.0"))
ROUTE_WEIGHT_MAX = float(os.getenv("ROUTE_WEIGHT_MAX", "1000.0"))

# 격자·경사·비용 제약
ROUTE_MAX_GRADE = float(os.getenv("ROUTE_MAX_GRADE", "0.14"))
ROUTE_MAX_GRADE_PAVED = float(os.getenv("ROUTE_MAX_GRADE_PAVED", "0.18"))
ROUTE_GRID_RES_M = float(os.getenv("ROUTE_GRID_RES_M", "2.0"))
ROUTE_AVOID_DEFAULT_RADIUS_M = float(os.getenv("ROUTE_AVOID_DEFAULT_RADIUS_M", "25.0"))
ROUTE_DEFAULT_GRADE_CLASS = os.getenv("ROUTE_DEFAULT_GRADE_CLASS", "trunk")
ROUTE_MAX_COST_CELLS = int(os.getenv("ROUTE_MAX_COST_CELLS", "4000000"))
ROUTE_REQUIRED_POINT_TOLERANCE_M = float(os.getenv("ROUTE_REQUIRED_POINT_TOLERANCE_M", "1.0"))
ROUTE_GRADE_CLASSES = ("trunk", "branch", "work")

# 임도 등급별 종단경사 한계 및 최소 곡선반지름
FOREST_ROAD_MAX_GRADE = {"trunk": 0.26, "branch": 0.28, "work": 0.40}
FOREST_ROAD_MIN_CURVE_R_M = {"trunk": 12.0, "branch": 10.0, "work": 6.0}

# 대안(정속경사) 파라미터
ROUTE_ALT_MIN_GRADE = float(os.getenv("ROUTE_ALT_MIN_GRADE", "0.08"))
ROUTE_ALT_MAX_GRADE = float(os.getenv("ROUTE_ALT_MAX_GRADE", "0.14"))
ROUTE_ALT_GRADE_TOLERANCE = float(os.getenv("ROUTE_ALT_GRADE_TOLERANCE", "0.005"))

# 지형 skeleton (능선/계곡) 파라미터
SKELETON_VALLEY_ACC_THRESHOLD_CELLS = int(os.getenv("SKELETON_VALLEY_ACC_THRESHOLD_CELLS", "500"))
SKELETON_MAIN_VALLEY_ACC_THRESHOLD_CELLS = int(
    os.getenv("SKELETON_MAIN_VALLEY_ACC_THRESHOLD_CELLS", "5000")
)
SKELETON_RIDGE_ACC_THRESHOLD_CELLS = int(os.getenv("SKELETON_RIDGE_ACC_THRESHOLD_CELLS", "500"))
SKELETON_MAIN_RIDGE_ACC_THRESHOLD_CELLS = int(
    os.getenv("SKELETON_MAIN_RIDGE_ACC_THRESHOLD_CELLS", "5000")
)
SKELETON_NODE_SPACING_M = float(os.getenv("SKELETON_NODE_SPACING_M", "10.0"))


# ─────────────────────────────────────────────────────────────────────────
# 5-4. 종횡단 생성 파라미터 (B06 WF3)
# ─────────────────────────────────────────────────────────────────────────
SECTION_STATION_INTERVAL_M = float(os.getenv("SECTION_STATION_INTERVAL_M", "20.0"))
SECTION_CROSS_HALF_WIDTH_M = float(os.getenv("SECTION_CROSS_HALF_WIDTH_M", "15.0"))
SECTION_CROSS_SAMPLE_INTERVAL_M = float(os.getenv("SECTION_CROSS_SAMPLE_INTERVAL_M", "0.5"))
SECTION_LONG_SAMPLE_INTERVAL_M = float(os.getenv("SECTION_LONG_SAMPLE_INTERVAL_M", "1.0"))
SECTION_INCLUDE_ENDPOINT = os.getenv("SECTION_INCLUDE_ENDPOINT", "True").lower() == "true"


# ─────────────────────────────────────────────────────────────────────────
# 6. 저장소 경로
# ─────────────────────────────────────────────────────────────────────────
STORAGE_BASE_DIR = os.path.join(os.path.dirname(os.path.dirname(__file__)), "storage")

# 시스템 리소스 로그 (루트 log 폴더에 단일 파일, 1개월 보관)
LOG_BASE_DIR = os.path.join(os.path.dirname(os.path.dirname(__file__)), "log")
RESOURCE_LOG_PATH = os.path.join(LOG_BASE_DIR, "system_resources.log")
RESOURCE_SAMPLE_INTERVAL_SEC = 120  # 계측 주기: 2분
RESOURCE_LOG_RETENTION_DAYS = 30  # 로그 보관: 1개월
PROJECT_STORAGE_STAGE_DIRS = frozenset(
    {
        "B03_FileInput",
        "B04_wf1_Surface",
        "B05_wf2_Route",
        "B06_wf3_ProfileCross",
        "B07_wf4_DesignDetail",
        "B08_wf5_Quantity",
        "B09_wf6_Estimation",
    }
)


# 프로젝트별 저장 구조: storage/[고객사]/[사용자]/[프로젝트ID]/
def get_project_storage_path(company: str, user: str, project_id: str) -> str:
    """검증된 식별자로 프로젝트 저장 경로를 생성한다."""
    segments = (company, user, project_id)
    for segment in segments:
        if (
            not segment
            or segment in {".", ".."}
            or os.path.isabs(segment)
            or "/" in segment
            or "\\" in segment
        ):
            raise ValueError("저장 경로 식별자는 비어 있거나 경로 구분자를 포함할 수 없습니다.")

    storage_root = os.path.abspath(STORAGE_BASE_DIR)
    path = os.path.abspath(os.path.join(storage_root, *segments))
    if os.path.commonpath((storage_root, path)) != storage_root:
        raise ValueError("프로젝트 저장 경로가 저장소 루트를 벗어났습니다.")

    os.makedirs(path, exist_ok=True)
    return path


# ─────────────────────────────────────────────────────────────────────────
# 7. 인증 및 이메일
# ─────────────────────────────────────────────────────────────────────────
SESSION_COOKIE_NAME = os.getenv("SESSION_COOKIE_NAME", "session_id")
SESSION_MAX_AGE_SECONDS = int(os.getenv("SESSION_MAX_AGE_SECONDS", "43200"))
SESSION_IDLE_TIMEOUT_SECONDS = int(os.getenv("SESSION_IDLE_TIMEOUT_SECONDS", "14400"))
SESSION_COOKIE_SECURE = os.getenv("SESSION_COOKIE_SECURE", "True").lower() == "true"
PASSWORD_BCRYPT_ROUNDS = int(os.getenv("PASSWORD_BCRYPT_ROUNDS", "12"))
OTP_VALID_MINUTES = int(os.getenv("EMAIL_OTP_VALID_MINUTES", "5"))
EMAIL_REVERIFY_DAYS = int(os.getenv("EMAIL_REVERIFY_DAYS", "90"))

SMTP_HOST = os.getenv("SMTP_HOST", "smtp.gmail.com")
SMTP_PORT = int(os.getenv("SMTP_PORT", "587"))
SMTP_USERNAME = os.getenv("SMTP_USERNAME", "")
SMTP_PASSWORD = os.getenv("SMTP_PASSWORD", "")
SMTP_USE_TLS = os.getenv("SMTP_USE_TLS", "True").lower() == "true"
EMAIL_FROM_ADDRESS = os.getenv("EMAIL_FROM_ADDRESS", SMTP_USERNAME)
EMAIL_FROM_NAME = os.getenv("EMAIL_FROM_NAME", "Aislo Support")
EMAIL_RETRY_COUNT = int(os.getenv("EMAIL_RETRY_COUNT", "3"))
EMAIL_RETRY_DELAY_SECONDS = int(os.getenv("EMAIL_RETRY_DELAY_SECONDS", "2"))
EMAIL_NOTIFICATION_ENABLED = os.getenv("EMAIL_NOTIFICATION_ENABLED", "True").lower() == "true"
ADMIN_EMAIL = os.getenv("ADMIN_EMAIL", "")

# ─────────────────────────────────────────────────────────────────────────
# 8. CORS (프론트엔드 도메인)
# ─────────────────────────────────────────────────────────────────────────
CORS_ORIGINS = os.getenv("CORS_ORIGINS", "http://localhost:5173,http://localhost:8000").split(",")

# ─────────────────────────────────────────────────────────────────────────
# 9. 환경 정보
# ─────────────────────────────────────────────────────────────────────────
ENVIRONMENT = os.getenv("ENVIRONMENT", "development")  # development, staging, production