"""Prompt assembly for signal planner service."""

from __future__ import annotations

from .shared import Any, PROMPT_SIGNAL_PLANNER, Signal, json, now_cn_naive


class SignalPlannerPromptMixin:
    """Build planner prompt text from signal and project context."""

    @classmethod
    def _build_prompt(
        cls,
        *,
        signal: Signal,
        project_title: str,
        charter_json: dict[str, Any],
        recent_signals: list[dict[str, Any]],
        members: list[dict[str, Any]],
    ) -> str:
        strategic = cls._as_dict(signal.strategic_analysis)
        ai_analysis = (
            strategic.get("ai_analysis")
            if isinstance(strategic.get("ai_analysis"), dict)
            else {}
        )
        return PROMPT_SIGNAL_PLANNER.format(
            signal_id=int(signal.id),
            signal_title=str(signal.title or ""),
            signal_summary=str(signal.summary or ai_analysis.get("summary") or ""),
            signal_content=str(signal.content or ""),
            project_id=(
                str(signal.matched_project_id)
                if signal.matched_project_id is not None
                else ""
            ),
            project_title=str(project_title or ""),
            project_scope=str(ai_analysis.get("requirement_project_scope") or ""),
            charter_json=json.dumps(charter_json or {}, ensure_ascii=False),
            recent_signals=json.dumps(recent_signals, ensure_ascii=False),
            member_profiles=json.dumps(members, ensure_ascii=False),
            now_cn=now_cn_naive().isoformat(),
        )