"""Heuristics service for suggestions based on rules."""

from datetime import datetime

from ..models import Session, Project


def suggest_next_steps(session: Session, project: Project) -> list[str]:
    """
    Generate suggestions based on session state and project context.
    Rules:
    - si hay blockers abiertos, sugerir "Destrabar: [bloqueos]"
    - si hay changes sin references, sugerir "Validar cambios recientes"
    - si work_done está vacío y session > 30 min, sugerir "Revisar progreso del objetivo"
    - si no hay next_steps definidos, sugerir "Definir próximos pasos"
    """
    suggestions = []

    # Rule: blockers open
    if session.blockers:
        for blocker in session.blockers:
            suggestions.append(f"Destrabar: {blocker}")

    # Rule: changes without references
    changes_without_refs = []
    for change in session.changes:
        # Simple heuristic: if change doesn't reference anything specific
        if change and not any(ref in change.lower() for ref in ["#", "commit", "pr", "issue"]):
            changes_without_refs.append(change)

    if changes_without_refs:
        suggestions.append("Validar cambios recientes")

    # Rule: work_done empty and session > 30 minutes
    if not session.work_done:
        duration = session.duration_minutes
        if duration == 0 and session.ended_at and session.started_at:
            duration = int((session.ended_at - session.started_at).total_seconds() / 60)

        if duration > 30:
            suggestions.append("Revisar progreso del objetivo")

    # Rule: no next_steps defined
    if not session.next_steps:
        suggestions.append("Definir próximos pasos")

    return suggestions