"""MCP tool definitions for CAD review."""
from __future__ import annotations

import logging
from pathlib import Path

logger = logging.getLogger(__name__)


def register_tools(mcp):
    """Register all MCP tools."""

    @mcp.tool()
    def get_assembly_tree(job_id: str) -> str:
        """Get the assembly tree structure for a loaded STEP file.

        Args:
            job_id: The job ID from uploading a STEP file.
        """
        from src.api.router import get_manager
        manager = get_manager()
        job = manager.get_job(job_id)
        if job is None:
            return f"Error: Job not found: {job_id}"
        if job.assembly_tree is None:
            return f"Error: Assembly tree not available yet (status: {job.status})"

        import json
        return json.dumps(job.assembly_tree.to_dict(), indent=2)

    @mcp.tool()
    def get_part_info(job_id: str, part_id: str) -> str:
        """Get detailed information about a specific part.

        Args:
            job_id: The job ID.
            part_id: The part ID from the assembly tree.
        """
        from src.api.router import get_manager
        manager = get_manager()
        job = manager.get_job(job_id)
        if job is None:
            return f"Error: Job not found: {job_id}"
        if job.assembly_tree is None:
            return "Error: Assembly tree not available yet"

        node = job.assembly_tree.find_by_id(part_id)
        if node is None:
            return f"Error: Part not found: {part_id}"

        import json
        info = node.to_dict()
        mesh = job.part_meshes.get(part_id)
        if mesh:
            info["mesh_vertices"] = len(mesh.vertices)
            info["mesh_triangles"] = len(mesh.triangles)
        return json.dumps(info, indent=2)

    @mcp.tool()
    def measure_part_distance(job_id: str, part_a_id: str, part_b_id: str) -> str:
        """Measure the minimum distance between two parts.

        Args:
            job_id: The job ID.
            part_a_id: ID of the first part.
            part_b_id: ID of the second part.
        """
        from src.api.router import get_manager
        from src.geometry.measurement import measure_distance

        manager = get_manager()
        job = manager.get_job(job_id)
        if job is None:
            return f"Error: Job not found: {job_id}"
        if job.assembly_tree is None:
            return "Error: Assembly tree not available yet"

        node_a = job.assembly_tree.find_by_id(part_a_id)
        node_b = job.assembly_tree.find_by_id(part_b_id)

        if node_a is None or node_a.shape is None:
            return f"Error: Part not found or has no shape: {part_a_id}"
        if node_b is None or node_b.shape is None:
            return f"Error: Part not found or has no shape: {part_b_id}"

        result = measure_distance(node_a.shape, node_b.shape)

        import json
        return json.dumps({
            "distance_mm": result.distance_mm,
            "point_a": result.point_a,
            "point_b": result.point_b,
        }, indent=2)

    @mcp.tool()
    def check_compliance_rules(job_id: str) -> str:
        """Run compliance checks on the loaded assembly.

        Args:
            job_id: The job ID.
        """
        from src.api.router import get_manager
        from src.compliance.kmvss_checker import check_compliance
        from src.compliance.rule_loader import load_rules

        manager = get_manager()
        job = manager.get_job(job_id)
        if job is None:
            return f"Error: Job not found: {job_id}"
        if job.assembly_tree is None:
            return "Error: Assembly tree not available yet"

        rules_path = Path(__file__).parent.parent.parent / "config" / "kmvss_rules.yaml"
        rules = load_rules(rules_path)
        results = check_compliance(rules, job.assembly_tree)

        import json
        return json.dumps([{
            "rule": r.rule_name,
            "passed": r.passed,
            "message": r.message,
            "severity": r.severity,
        } for r in results], indent=2)

    @mcp.tool()
    def get_collision_report(job_id: str) -> str:
        """Get a collision/proximity report for all parts.

        Args:
            job_id: The job ID.
        """
        from src.api.router import get_manager
        from src.geometry.measurement import scan_proximity

        manager = get_manager()
        job = manager.get_job(job_id)
        if job is None:
            return f"Error: Job not found: {job_id}"
        if job.assembly_tree is None:
            return "Error: Assembly tree not available yet"

        parts = []
        for leaf in job.assembly_tree.iter_leaves():
            if leaf.shape is not None and not leaf.shape.IsNull():
                parts.append({"id": leaf.id, "name": leaf.name, "shape": leaf.shape})

        results = scan_proximity(parts)

        import json
        return json.dumps([{
            "part_a": r.part_a_name,
            "part_b": r.part_b_name,
            "distance_mm": r.min_distance_mm,
            "status": r.status,
        } for r in results], indent=2)