mirror of
https://github.com/Alishahryar1/free-claude-code.git
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Alishahryar1
126 lines
4.3 KiB
Python
126 lines
4.3 KiB
Python
"""Model routing for Claude-compatible requests."""
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from __future__ import annotations
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from dataclasses import dataclass
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from loguru import logger
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from config.provider_ids import SUPPORTED_PROVIDER_IDS
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from config.settings import Settings
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from .gateway_model_ids import decode_gateway_model_id
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from .models.anthropic import MessagesRequest, TokenCountRequest
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@dataclass(frozen=True, slots=True)
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class ResolvedModel:
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original_model: str
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provider_id: str
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provider_model: str
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provider_model_ref: str
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thinking_enabled: bool
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@dataclass(frozen=True, slots=True)
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class RoutedMessagesRequest:
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request: MessagesRequest
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resolved: ResolvedModel
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@dataclass(frozen=True, slots=True)
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class RoutedTokenCountRequest:
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request: TokenCountRequest
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resolved: ResolvedModel
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class ModelRouter:
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"""Resolve incoming Claude model names to configured provider/model pairs."""
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def __init__(self, settings: Settings):
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self._settings = settings
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def resolve(self, claude_model_name: str) -> ResolvedModel:
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(
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direct_provider_id,
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direct_provider_model,
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force_thinking_enabled,
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) = self._direct_provider_model(claude_model_name)
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if direct_provider_id is not None and direct_provider_model is not None:
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thinking_enabled = (
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force_thinking_enabled
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if force_thinking_enabled is not None
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else self._settings.resolve_thinking(direct_provider_model)
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)
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logger.debug(
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"MODEL DIRECT: '{}' -> provider='{}' model='{}' thinking={}",
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claude_model_name,
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direct_provider_id,
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direct_provider_model,
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thinking_enabled,
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)
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return ResolvedModel(
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original_model=claude_model_name,
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provider_id=direct_provider_id,
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provider_model=direct_provider_model,
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provider_model_ref=claude_model_name,
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thinking_enabled=thinking_enabled,
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)
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provider_model_ref = self._settings.resolve_model(claude_model_name)
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thinking_enabled = self._settings.resolve_thinking(claude_model_name)
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provider_id = Settings.parse_provider_type(provider_model_ref)
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provider_model = Settings.parse_model_name(provider_model_ref)
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if provider_model != claude_model_name:
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logger.debug(
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"MODEL MAPPING: '{}' -> '{}'", claude_model_name, provider_model
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)
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return ResolvedModel(
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original_model=claude_model_name,
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provider_id=provider_id,
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provider_model=provider_model,
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provider_model_ref=provider_model_ref,
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thinking_enabled=thinking_enabled,
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)
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def _direct_provider_model(
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self, model_name: str
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) -> tuple[str | None, str | None, bool | None]:
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decoded = decode_gateway_model_id(model_name)
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if decoded is not None:
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if decoded.provider_id not in SUPPORTED_PROVIDER_IDS:
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return None, None, None
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return (
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decoded.provider_id,
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decoded.provider_model,
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decoded.force_thinking_enabled,
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)
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provider_id, separator, provider_model = model_name.partition("/")
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if not separator:
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return None, None, None
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if provider_id not in SUPPORTED_PROVIDER_IDS:
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return None, None, None
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if not provider_model:
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return None, None, None
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return provider_id, provider_model, None
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def resolve_messages_request(
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self, request: MessagesRequest
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) -> RoutedMessagesRequest:
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"""Return an internal routed request context."""
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resolved = self.resolve(request.model)
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routed = request.model_copy(deep=True)
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routed.model = resolved.provider_model
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return RoutedMessagesRequest(request=routed, resolved=resolved)
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def resolve_token_count_request(
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self, request: TokenCountRequest
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) -> RoutedTokenCountRequest:
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"""Return an internal token-count request context."""
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resolved = self.resolve(request.model)
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routed = request.model_copy(
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update={"model": resolved.provider_model}, deep=True
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)
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return RoutedTokenCountRequest(request=routed, resolved=resolved)
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