"""Exercise browser routes with HTMX search/filter support.

All filtering is done via HTMX partial responses — no JSON APIs.
"""

import structlog
from fastapi import APIRouter, Depends, Query, Request
from fastapi.responses import HTMLResponse
from sqlmodel import Session

from app.database import get_db_session
from app.models.user import User
from app.services.exercise_service import ExerciseService
from app.utils.auth import get_current_admin_user

logger = structlog.get_logger(__name__)

router = APIRouter(prefix="/exercises", tags=["exercises"])


@router.get("", response_class=HTMLResponse)
async def exercise_browser(
    request: Request,
    session: Session = Depends(get_db_session),
    admin: User = Depends(get_current_admin_user),
):
    """Render the exercise browser page with all exercises.

    Args:
        request: The incoming HTTP request.
        session: Database session.
        admin: The authenticated admin user.

    Returns:
        Rendered exercise browser page.
    """
    exercise_service = ExerciseService(session)
    exercises = exercise_service.list_exercises()
    workout_days = exercise_service.list_workout_days()

    # Collect unique muscle groups for the filter dropdown
    muscle_groups = sorted(set(ex.muscle_group for ex in exercises))

    templates = request.app.state.templates
    return templates.TemplateResponse("pages/exercise_browser.html", {
        "request": request,
        "exercises": exercises,
        "workout_days": workout_days,
        "muscle_groups": muscle_groups,
        "admin": admin,
    })


@router.get("/search", response_class=HTMLResponse)
async def exercise_search(
    request: Request,
    session: Session = Depends(get_db_session),
    admin: User = Depends(get_current_admin_user),
    workout_day: str = Query(default="", alias="workout_day"),
    muscle_group: str = Query(default="", alias="muscle_group"),
):
    """Return filtered exercise list as an HTMX partial.

    Called via hx-get from the exercise browser filter dropdowns.

    Args:
        request: The incoming HTTP request.
        session: Database session.
        admin: The authenticated admin user.
        workout_day: Filter by workout day name.
        muscle_group: Filter by muscle group.

    Returns:
        Rendered exercise list partial HTML.
    """
    exercise_service = ExerciseService(session)
    exercises = exercise_service.list_exercises(
        workout_day=workout_day or None,
        muscle_group=muscle_group or None,
    )

    templates = request.app.state.templates
    return templates.TemplateResponse("partials/exercise_list.html", {
        "request": request,
        "exercises": exercises,
    })