from pathlib import Path
import os

from fastapi import APIRouter, Depends, HTTPException, Request

from services.auth_service import get_current_active_user
from models.database import User
from utils.logger import get_logger
from api.routes import (
    tasks,
    cavity_layout_optimizer,
    mold_system_designer,
    side_action_designer,
    mold_cam_designer,
    collision_detector,
    toolpath_optimizer,
    edm_designer,
    machining_simulator,
    cad_exporter,
)

logger = get_logger(__name__)

router = APIRouter()


@router.post("/optimize-layout")
async def optimize_cavity_layout(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """多型腔布局优化"""
    body = await request.json()
    product_bbox = body.get("product_bbox", {"dimensions": [100, 100, 50]})
    cavity_count = body.get("cavity_count", 1)
    mold_base_size = body.get("mold_base_size")
    layout_type = body.get("layout_type", "auto")

    if cavity_count < 1 or cavity_count > 64:
        raise HTTPException(400, "型腔数量必须在 1-64 之间")

    result = cavity_layout_optimizer.optimize_layout(
        product_bbox=product_bbox,
        cavity_count=cavity_count,
        mold_base_size=mold_base_size,
        layout_type=layout_type,
    )

    return {"status": "success", "data": result}


@router.post("/design-cooling")
async def design_cooling_system(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """冷却系统设计"""
    body = await request.json()
    mold_size = body.get("mold_size", {"length": 300, "width": 300, "height": 200})
    product_bbox = body.get("product_bbox", {"dimensions": [100, 100, 50]})
    material = body.get("material", "ABS")
    cavity_count = body.get("cavity_count", 1)
    cycle_time_target = body.get("cycle_time_target")

    from core.mold_system_designer import CoolingSystemDesigner

    designer = CoolingSystemDesigner()
    result = designer.design_cooling_system(
        mold_size=mold_size,
        product_bbox=product_bbox,
        material=material,
        cavity_count=cavity_count,
        cycle_time_target=cycle_time_target,
    )

    return {"status": "success", "data": result}


@router.post("/design-gating")
async def design_gating_system(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """浇注系统设计"""
    body = await request.json()
    product_bbox = body.get("product_bbox", {"dimensions": [100, 100, 50]})
    material = body.get("material", "ABS")
    cavity_count = body.get("cavity_count", 1)
    gate_type = body.get("gate_type", "auto")
    layout_positions = body.get("layout_positions")

    from core.mold_system_designer import GatingSystemDesigner

    designer = GatingSystemDesigner()
    result = designer.design_gating_system(
        product_bbox=product_bbox,
        material=material,
        cavity_count=cavity_count,
        gate_type=gate_type,
        layout_positions=layout_positions,
    )

    return {"status": "success", "data": result}


@router.post("/design-mold-system")
async def design_complete_mold_system(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """综合模具系统设计（冷却+浇注）"""
    body = await request.json()
    mold_size = body.get("mold_size", {"length": 300, "width": 300, "height": 200})
    product_bbox = body.get("product_bbox", {"dimensions": [100, 100, 50]})
    material = body.get("material", "ABS")
    cavity_count = body.get("cavity_count", 1)
    gate_type = body.get("gate_type", "auto")
    cycle_time_target = body.get("cycle_time_target")
    layout_positions = body.get("layout_positions")

    result = mold_system_designer.design_complete_system(
        mold_size=mold_size,
        product_bbox=product_bbox,
        material=material,
        cavity_count=cavity_count,
        gate_type=gate_type,
        cycle_time_target=cycle_time_target,
        layout_positions=layout_positions,
    )

    return {"status": "success", "data": result}


@router.post("/ai-parting-detect")
async def ai_parting_surface_detect(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """AI 分型面检测"""
    body = await request.json()
    task_id = body.get("task_id")

    if not task_id or task_id not in tasks:
        raise HTTPException(404, "任务不存在")

    task_data = tasks[task_id]
    geometry_data = task_data.get("geometry_data")
    if not geometry_data:
        raise HTTPException(400, "该任务尚未完成几何分析")

    from core.ai_parting_detector import AIPartingSurfaceDetectorV2

    detector = AIPartingSurfaceDetectorV2(use_gnn=True)
    result = detector._detect_with_geometry(None, geometry_data)
    return {"status": "success", "data": result}


@router.post("/detect-undercuts")
async def detect_undercuts(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """倒扣区域检测与滑块/斜顶机构设计"""
    body = await request.json()
    task_id = body.get("task_id")
    parting_direction = body.get("parting_direction", [0, 0, 1])
    mold_size = body.get("mold_size", {"length": 300, "width": 300, "height": 200})

    if not task_id or task_id not in tasks:
        raise HTTPException(404, "任务不存在")

    task_data = tasks[task_id]
    geometry_data = task_data.get("geometry_data")
    if not geometry_data:
        raise HTTPException(400, "该任务尚未完成几何分析")

    result = side_action_designer.analyze_and_design(
        shape=None,
        parting_direction=parting_direction,
        mold_size=mold_size,
    )
    return {"status": "success", "data": result}


@router.post("/design-cam")
async def design_mold_cam(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """模具CAM刀路设计"""
    body = await request.json()
    cavity_bbox = body.get("cavity_bbox", {"dimensions": [100, 100, 50], "min": [-50, -50, -25], "max": [50, 50, 25]})
    stock_bbox = body.get("stock_bbox", {"dimensions": [150, 150, 100], "min": [-75, -75, -50], "max": [75, 75, 50]})
    mold_steel = body.get("mold_steel", "P20")
    surface_quality = body.get("surface_quality", "standard")
    controller = body.get("controller", "fanuc")

    result = mold_cam_designer.design_mold_cam(
        cavity_bbox=cavity_bbox,
        stock_bbox=stock_bbox,
        mold_steel=mold_steel,
        surface_quality=surface_quality,
        controller=controller,
    )

    return {"status": "success", "data": result}


@router.post("/check-collision")
async def check_toolpath_collision(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """刀路碰撞检测"""
    body = await request.json()
    toolpath_points = body.get("toolpath_points", [[0, 0, 50], [10, 10, -5], [20, 20, -10]])
    tool = body.get("tool", {"diameter": 10, "flute_length": 30, "shank_diameter": 10})
    stock_bbox = body.get("stock_bbox", {"min": [-50, -50, -25], "max": [50, 50, 25]})
    clamp_positions = body.get("clamp_positions")

    result = collision_detector.check_toolpath_safety(
        toolpath_points, tool, stock_bbox, clamp_positions
    )
    return {"status": "success", "data": result}


@router.post("/optimize-toolpath")
async def optimize_toolpath(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """刀路优化"""
    body = await request.json()
    toolpath_points = body.get("toolpath_points", [[0, 0, 50], [10, 10, -5], [20, 20, -10]])
    cutting_params = body.get("cutting_params", {"feed_rate_mm_min": 500})
    stock_bbox = body.get("stock_bbox")

    result = toolpath_optimizer.optimize_toolpath(
        toolpath_points, cutting_params, stock_bbox
    )
    return {"status": "success", "data": result}


@router.post("/design-electrodes")
async def design_edm_electrodes(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """EDM电极设计"""
    body = await request.json()
    undercut_regions = body.get("undercut_regions", [{"center": [0, 0, 0], "area": 100, "type": "undercut"}])
    cavity_bbox = body.get("cavity_bbox", {"dimensions": [100, 100, 50]})
    material = body.get("material", "copper")
    spark_gap = body.get("spark_gap", 0.05)
    overburn = body.get("overburn", 0.1)

    result = edm_designer.design_electrodes(
        undercut_regions, cavity_bbox, material, spark_gap, overburn
    )
    return {"status": "success", "data": result}


@router.post("/simulate-machining")
async def simulate_machining(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """加工仿真"""
    body = await request.json()
    operations = body.get("operations", [{"strategy": "z_level_roughing", "levels": [{"z": -5}]}])
    stock_bbox = body.get("stock_bbox", {"dimensions": [100, 100, 50], "min": [-50, -50, -25], "max": [50, 50, 25]})
    resolution = body.get("resolution", 2.0)

    result = machining_simulator.simulate_machining(
        operations, stock_bbox, resolution
    )
    return {"status": "success", "data": result}


@router.post("/export-mold")
async def export_mold_results(
    request: Request,
    current_user: User = Depends(get_current_active_user),
):
    """导出模具设计结果（STEP/IGES/STL/BRep）"""
    body = await request.json()
    task_id = body.get("task_id")
    formats = body.get("formats", ["step", "stl"])
    components = body.get("components", ["cavity", "core"])

    if not task_id or task_id not in tasks:
        raise HTTPException(404, "任务不存在")

    task_data = tasks[task_id]
    cavity_shapes = task_data.get("cavity_shapes")
    if not cavity_shapes:
        raise HTTPException(400, "该任务尚未完成模具生成或形状数据不可用")

    base_filename = Path(task_data.get("filename", f"mold_{task_id}")).stem
    result = cad_exporter.export_mold_results(
        cavity_data=cavity_shapes,
        base_filename=base_filename,
        formats=formats,
        components=components,
    )

    return {"status": "success", "data": result}


@router.get("/export-download/{filepath:path}")
async def download_export_file(
    filepath: str,
    current_user: User = Depends(get_current_active_user),
):
    """下载导出的CAD文件"""
    from fastapi.responses import FileResponse

    full_path = os.path.join(cad_exporter.output_dir, filepath)

    if not os.path.exists(full_path):
        raise HTTPException(404, "文件不存在")

    if not os.path.abspath(full_path).startswith(os.path.abspath(cad_exporter.output_dir)):
        raise HTTPException(403, "禁止访问")

    media_types = {
        ".step": "application/step",
        ".stp": "application/step",
        ".iges": "application/iges",
        ".igs": "application/iges",
        ".stl": "model/stl",
        ".brep": "application/octet-stream",
    }

    ext = Path(full_path).suffix.lower()
    media_type = media_types.get(ext, "application/octet-stream")

    return FileResponse(
        full_path,
        media_type=media_type,
        filename=os.path.basename(full_path),
    )


@router.get("/export-recommendations")
async def get_export_recommendations(
    target: str = "ug",
    current_user: User = Depends(get_current_active_user),
):
    """获取导出格式建议（UG/FreeCAD/SolidWorks）"""
    result = cad_exporter.get_export_recommendations(target)
    return {"status": "success", "data": result}