"""Build teams from config.

Config is a plain dict (loaded from YAML/JSON by the launcher). M1 needs only a
single same-model 2-member team; the schema is the SPEC §7 shape so M2+ scales
to multiple, mixed-model teams without changes.

    {
      "teams": [
        {"id": "falcon", "topology": "star", "framing": "neutral",
         "members": [
           {"name": "archie", "model": "qwen2.5-coder:3b", "role": "architect"},
           {"name": "bob",    "model": "qwen2.5-coder:3b", "role": "builder"}
         ]}
      ]
    }
"""

from __future__ import annotations

from .team import Member, Team


def build_team(spec: dict) -> Team:
    framing = spec.get("framing", "neutral")
    members = [
        Member(name=m["name"], model=m["model"],
               role=m.get("role", "peer"),
               framing=m.get("framing", framing))
        for m in spec["members"]
    ]
    if not members:
        raise ValueError(f"team {spec.get('id')!r} has no members")
    return Team(id=spec["id"], members=members,
                topology=spec.get("topology", "star"), framing=framing)


def build_teams(config: dict) -> list[Team]:
    teams = [build_team(t) for t in config.get("teams", [])]
    if not teams:
        raise ValueError("config has no teams")
    return teams


def same_model_team(model: str, *, team_id: str = "solo",
                    framing: str = "neutral") -> Team:
    """Convenience for M1: a 2-member architect+builder team on one model."""
    return build_team({
        "id": team_id, "topology": "star", "framing": framing,
        "members": [
            {"name": "archie", "model": model, "role": "architect"},
            {"name": "bob", "model": model, "role": "builder"},
        ],
    })