import os
from flask import Blueprint, render_template, request, redirect, url_for, flash, current_app
from flask_login import login_required, current_user
from ..extensions import db
from ..models import Activity, ActivityStatus, ActivitySubmission, SubmissionImage, ReviewStatus
from ..services.images import save_image

bp = Blueprint("activities", __name__, url_prefix="/activities")

@bp.route("")
def list_activities():
    acts = Activity.query.filter(Activity.status != ActivityStatus.draft).order_by(Activity.start_at).all()
    return render_template("activities/list.html", activities=acts)

@bp.route("/<int:act_id>")
def detail(act_id):
    act = Activity.query.get_or_404(act_id)
    return render_template("activities/detail.html", activity=act)

@bp.route("/<int:act_id>/submit", methods=["GET", "POST"])
@login_required
def submit(act_id):
    act = Activity.query.get_or_404(act_id)
    if request.method == "POST":
        files = request.files.getlist("images")
        sub = ActivitySubmission(activity_id=act.id, user_id=current_user.id, status=ReviewStatus.pending)
        db.session.add(sub)
        db.session.flush()
        upload_dir = os.path.join(current_app.config["UPLOAD_FOLDER"], "activities")
        for idx, f in enumerate(files):
            original, web, thumb, exif = save_image(f, upload_dir)
            img = SubmissionImage(submission_id=sub.id, original_path=original, web_path=web, thumb_path=thumb, exif_json=exif, order_index=idx)
            db.session.add(img)
        db.session.commit()
        flash("投稿已提交，待审核")
        return redirect(url_for("activities.detail", act_id=act.id))
    return render_template("activities/submit.html", activity=act)