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"""
Bindings for the HMC Topology Geometry.
"""
from dataclasses import dataclass
from typing import List, Mapping

from geojson import LineString, Point
from google.protobuf.message import Message
from here.content.base import ContentIndexer, ContentPartition, SingleLayerBinding
from here.content.content import hmc_schema_version
from here.content.utils.proto import parse_linestring, parse_point, parse_ref
from here.platform.adapter import Identifier, Partition, Ref

[docs]
@dataclass
class Node:
"""Topology node."""

partition_id: Partition
node_id: Identifier
segment_ref: List[Ref]
geometry: Point
z_level: int

indexer = ContentIndexer(partition="partition_id", identifier="node_id")

[docs]
@dataclass
class Segment:
"""Topology segment."""

partition_id: Partition
segment_id: Identifier
start_node_ref: Ref
end_node_ref: Ref
geometry: LineString
z_level: List[int]
length: float

indexer = ContentIndexer(partition="partition_id", identifier="segment_id")

[docs]
class TopologyGeometry(SingleLayerBinding):
"""
Bindings for the HMC Topology Geometry.
"""

[docs]
@classmethod
def schema_hrn(cls) -> List[str]:
"""
:return: the HRN of schema this binding can parse and index
"""
return [f"hrn:here:schema:::com.here.schema.rib:topology-geometry_v2:{hmc_schema_version}"]

[docs]
@classmethod
def object_types(cls) -> Mapping[str, type]:
"""
:return: the types of features supported by this binding
"""
return {"node": Node, "segment": Segment}

[docs]
@classmethod
def parse_and_index(cls, partition_id: str, msg: Message) -> ContentPartition:
"""
Parse and index decoded message.

:param partition_id: identifier of the partition
:param msg: decoded content from the layer, in the form of a Protobuf message
:return: the content of a partition parsed and indexed in its own data structure
"""
assert hasattr(msg, "node")
assert hasattr(msg, "segment")

node = [
Node(
partition_id=Partition(partition_id),
node_id=Identifier(n.identifier),
segment_ref=[parse_ref(r) for r in n.segment_ref],
geometry=parse_point(n.geometry),
z_level=n.geometry.z_level,
)
for n in msg.node # type: ignore
]
segment = [
Segment(
partition_id=Partition(partition_id),
segment_id=Identifier(s.identifier),
start_node_ref=parse_ref(s.start_node_ref),
end_node_ref=parse_ref(s.end_node_ref),
geometry=parse_linestring(s.geometry),
z_level=[p.z_level for p in s.geometry.point],
length=s.length,
)
for s in msg.segment # type: ignore
]

return ContentPartition(cls, node=node, segment=segment)