"""Progress dashboard routes.

Displays summary statistics, volume charts, and per-exercise progress.
"""

import json

import structlog
from fastapi import APIRouter, Depends, 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.analytics_service import AnalyticsService
from app.services.exercise_service import ExerciseService
from app.services.progression_service import ProgressionService
from app.utils.auth import get_current_admin_user, get_active_profile_id

logger = structlog.get_logger(__name__)

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


@router.get("", response_class=HTMLResponse)
async def dashboard(
    request: Request,
    session: Session = Depends(get_db_session),
    admin: User = Depends(get_current_admin_user),
):
    """Render the progress dashboard for the active profile.

    Shows: summary stats, volume by day chart, exercise progress links.
    """
    active_profile_id = get_active_profile_id(request)
    active_profile = (
        session.get(User, active_profile_id)
        if active_profile_id
        else None
    )

    stats = {}
    volume_data = {}
    if active_profile_id:
        analytics = AnalyticsService(session)
        stats = analytics.get_user_stats(active_profile_id)
        volume_data = analytics.get_volume_by_day(active_profile_id)

    exercise_service = ExerciseService(session)
    exercises = exercise_service.list_exercises()

    templates = request.app.state.templates
    return templates.TemplateResponse("pages/dashboard.html", {
        "request": request,
        "stats": stats,
        "volume_data_json": json.dumps(volume_data),
        "exercises": exercises,
        "active_profile": active_profile,
        "admin": admin,
    })


@router.get("/exercise/{exercise_id}", response_class=HTMLResponse)
async def exercise_progress(
    exercise_id: int,
    request: Request,
    session: Session = Depends(get_db_session),
    admin: User = Depends(get_current_admin_user),
):
    """Render per-exercise progress page with charts and suggestions."""
    active_profile_id = get_active_profile_id(request)
    active_profile = (
        session.get(User, active_profile_id)
        if active_profile_id
        else None
    )

    exercise_service = ExerciseService(session)
    exercise = exercise_service.get_exercise_by_id(exercise_id)

    progress_data = {}
    suggestion = {}
    if active_profile_id:
        analytics = AnalyticsService(session)
        progress_data = analytics.get_exercise_progress(
            active_profile_id, exercise_id,
        )

        progression = ProgressionService(session)
        suggestion = progression.get_suggestion(
            active_profile_id, exercise_id,
        )

    templates = request.app.state.templates
    return templates.TemplateResponse("pages/exercise_progress.html", {
        "request": request,
        "exercise": exercise,
        "progress_data_json": json.dumps(progress_data),
        "suggestion": suggestion,
        "active_profile": active_profile,
        "admin": admin,
    })