"""Model-provider adapter for the legacy Anthropic-compatible endpoint."""
from __future__ import annotations

import json

try:  # Works both as `python pilot/ai_review.py` and `import pilot.model_client`.
    from .gitea_client import request
except ImportError:  # pragma: no cover - script-style runtime
    from gitea_client import request


def parse_text_blocks(content: object) -> str:
    """Return only text blocks from an Anthropic-style response."""
    if not isinstance(content, list):
        return ""
    return "\n".join(
        block["text"]
        for block in content
        if isinstance(block, dict)
        and block.get("type") == "text"
        and isinstance(block.get("text"), str)
    ).strip()


def complete(base_url: str, model: str, system: str, user: str, max_tokens: int) -> str:
    payload = {
        "model": model,
        "max_tokens": max_tokens,
        "system": system,
        "messages": [{"role": "user", "content": user}],
    }
    status, raw = request("POST", f"{base_url.rstrip('/')}/v1/messages", "ollama", payload)
    if status != 200:
        detail = raw[:500].decode("utf-8", errors="replace")
        raise RuntimeError(f"model call failed: HTTP {status}: {detail}")
    return parse_text_blocks(json.loads(raw).get("content", []))