"""Ads blueprint: click tracking redirect, sponsor directory.
Ad creative upload lives in the admin blueprint (Phase 6).
"""
from flask import (Blueprint, redirect, abort, render_template,
                   request, current_app)
from flask_login import current_user
from flask_babel import get_locale

from app.extensions import db
from app.models.ads import Ad
from app.services.ads import (get_ad, record_impression, record_click,
                               active_sponsors)
from app.services.settings import get_setting

ads_bp = Blueprint("ads", __name__)


# ── Click tracking redirect ────────────────────────────────────────────────

@ads_bp.route("/ads/<int:ad_id>/click")
def click(ad_id):
    ad = db.session.get(Ad, ad_id)
    if ad is None or not ad.is_running:
        abort(404)
    try:
        record_click(ad_id)
    except Exception as e:
        current_app.logger.error("Click record error: %s", e)
    return redirect(ad.target_url)


# ── Sponsor directory ──────────────────────────────────────────────────────

@ads_bp.route("/sponsors")
def sponsor_directory():
    sponsors = active_sponsors(tier="directory")
    return render_template("sponsors/directory.html", sponsors=sponsors)


# ── Context processor: inject ads into every template ─────────────────────

def inject_ads():
    """Called by the app factory context processor.
    Returns ad slots for use in templates.
    Ads suppressed for subscribers (ad_free plan limit).
    """
    if not get_setting("ads_enabled", True):
        return {"ads": {}, "show_ads": False}

    show_ads = True
    if current_user.is_authenticated:
        plan = current_user.tier
        if plan and plan.limit("ad_free"):
            show_ads = False

    if not show_ads:
        return {"ads": {}, "show_ads": False}

    lang = str(get_locale()) if get_locale() else None
    state = request.args.get("state") or None

    ads = {}
    for slot in Ad.SLOTS:
        ad = get_ad(slot, lang=lang, state=state)
        if ad:
            ads[slot] = ad
            # record impression (fire-and-forget; errors suppressed)
            try:
                record_impression(ad.id)
            except Exception:
                pass

    return {"ads": ads, "show_ads": True}