# plugins/media/routes.py

import os
from uuid import uuid4
from datetime import datetime
from PIL import Image

from flask import (
    Blueprint,
    redirect,
    url_for,
    request,
    flash,
    send_from_directory,
    current_app,
    jsonify
)
from flask_login import login_required, current_user

from app import db
from .models import Media, ImageHeart, FeaturedImage
from plugins.plant.models import Plant

bp = Blueprint("media", __name__, url_prefix="/media", template_folder="templates")

# -----------------------------------------------------------------------------
# Make generate_image_url available in all templates
# -----------------------------------------------------------------------------
@bp.app_context_processor
def utility_processor():
    def generate_image_url(path):
        if path:
            return url_for("media.media_file", filename=path)
        w, h = current_app.config.get("STANDARD_IMG_SIZE", (300, 200))
        return f"https://placehold.co/{w}x{h}"
    return dict(generate_image_url=generate_image_url)

# -----------------------------------------------------------------------------
# Helpers & config
# -----------------------------------------------------------------------------
def allowed_file(filename):
    ext = filename.rsplit(".", 1)[-1].lower() if "." in filename else ""
    return ext in current_app.config.get("ALLOWED_EXTENSIONS", {"png","jpg","jpeg","gif"})

def get_upload_path():
    base = current_app.config.get("UPLOAD_FOLDER", "static/uploads")
    now = datetime.utcnow()
    subdir = os.path.join(str(now.year), f"{now.month:02}", f"{now.day:02}")
    full = os.path.join(base, subdir)
    os.makedirs(full, exist_ok=True)
    return full, subdir

# -----------------------------------------------------------------------------
# Routes
# -----------------------------------------------------------------------------
@bp.route("/", methods=["GET"])
def media_index():
    return redirect(url_for("core_ui.home"))

@bp.route("/files/<path:filename>", methods=["GET"])
def media_file(filename):
    # Strip leading "uploads/" if present
    if filename.startswith("uploads/"):
        filename = filename[len("uploads/"):]
    folder = current_app.config.get("UPLOAD_FOLDER", "static/uploads")
    return send_from_directory(folder, filename)

@bp.route("/heart/<int:media_id>", methods=["POST"])
@login_required
def toggle_heart(media_id):
    existing = ImageHeart.query.filter_by(user_id=current_user.id, media_id=media_id).first()
    if existing:
        db.session.delete(existing)
        db.session.commit()
        return jsonify({"status": "unhearted"})
    heart = ImageHeart(user_id=current_user.id, media_id=media_id)
    db.session.add(heart)
    db.session.commit()
    return jsonify({"status": "hearted"})

@bp.route("/add/<string:plant_uuid>", methods=["POST"])
@login_required
def add_media(plant_uuid):
    plant = Plant.query.filter_by(uuid=plant_uuid).first_or_404()
    file = request.files.get("file")
    if not file or not allowed_file(file.filename):
        flash("Invalid or missing file.", "danger")
        return redirect(request.referrer or url_for("plant.edit", uuid_val=plant_uuid))

    ext = file.filename.rsplit(".", 1)[-1].lower()
    filename = f"{uuid4()}.{ext}"
    full_path, subdir = get_upload_path()
    file.save(os.path.join(full_path, filename))

    media = Media(
        file_url=os.path.join(subdir, filename).replace("\\", "/"),
        uploader_id=current_user.id,
        plant_id=plant.id
    )
    db.session.add(media)
    db.session.commit()
    flash("Media uploaded successfully.", "success")
    return redirect(request.referrer or url_for("plant.edit", uuid_val=plant_uuid))

@bp.route("/feature/<int:media_id>", methods=["POST"])
@login_required
def set_featured_image(media_id):
    media = Media.query.get_or_404(media_id)
    if current_user.id != media.uploader_id and current_user.role != "admin":
        flash("Not authorized to set featured image.", "danger")
        return redirect(request.referrer or url_for("core_ui.home"))

    FeaturedImage.query.filter_by(media_id=media_id).delete()
    featured = FeaturedImage(media_id=media_id, is_featured=True)
    db.session.add(featured)
    db.session.commit()
    flash("Image set as featured.", "success")
    return redirect(request.referrer or url_for("plant.edit", uuid_val=media.plant.uuid))

@bp.route("/delete/<int:media_id>", methods=["POST"])
@login_required
def delete_media(media_id):
    media = Media.query.get_or_404(media_id)
    if current_user.id != media.uploader_id and current_user.role != "admin":
        flash("Not authorized to delete this media.", "danger")
        return redirect(request.referrer or url_for("core_ui.home"))

    full_path = os.path.join(current_app.config.get("UPLOAD_FOLDER", "static/uploads"), media.file_url)
    if os.path.exists(full_path):
        os.remove(full_path)

    db.session.delete(media)
    db.session.commit()
    flash("Media deleted.", "success")
    return redirect(request.referrer or url_for("plant.edit", uuid_val=media.plant.uuid))

@bp.route("/rotate/<int:media_id>", methods=["POST"])
@login_required
def rotate_media(media_id):
    media = Media.query.get_or_404(media_id)
    if current_user.id != media.uploader_id and current_user.role != "admin":
        flash("Not authorized to rotate this media.", "danger")
        return redirect(request.referrer or url_for("core_ui.home"))

    full_path = os.path.join(current_app.config.get("UPLOAD_FOLDER", "static/uploads"), media.file_url)
    try:
        with Image.open(full_path) as img:
            img.rotate(-90, expand=True).save(full_path)
        flash("Image rotated successfully.", "success")
    except Exception as e:
        flash(f"Failed to rotate image: {e}", "danger")

    return redirect(request.referrer or url_for("plant.edit", uuid_val=media.plant.uuid))