# myapp/views/dashboard.py
import json
from flask import Blueprint, render_template, request, jsonify, redirect, url_for
from ..auth.decorators import require_role
from ..services.user_service import get_or_load_current_user, add_course_for_current_user
from ..services.course_service import load_course, user_selected_course_briefs

bp = Blueprint("main", __name__)  # 根路径蓝图

@bp.get("/dashboard")
@require_role
def dashboard():
    user_obj = get_or_load_current_user()
    if user_obj is None:
        return redirect(url_for("auth.login"))

    user_course_data = user_selected_course_briefs(user_obj)
    return render_template(
        "dashboard.html",
        user_data=user_obj.to_json_without_dialog(),
        user_course_data=json.dumps(user_course_data, ensure_ascii=False),
    )

@bp.get("/course/<course_id>")
@require_role
def course(course_id):
    c = load_course(course_id)
    return render_template("course.html", course_id=course_id, course_data=c)

@bp.post("/select_course")
@require_role
def select_course():
    data = request.get_json(force=True) or {}
    course_id = data.get("course_id")
    if not course_id:
        return jsonify({"success": False, "message": "缺少 course_id"}), 400

    course_data = load_course(course_id)
    ok = add_course_for_current_user(course_id, course_data)
    if not ok:
        return jsonify({"success": False, "message": "未登录或会话失效"}), 401
    return jsonify({"success": True, "message": "课程选择成功"})

@bp.get("/")
@require_role
def home_index():
    user_obj = get_or_load_current_user()
    if user_obj is None:
        return redirect(url_for("auth.login"))

    selected_courses = list(getattr(user_obj, "select_course", []))
    # 课程目录：依据你的 CourseList 暴露的接口进行传递（这里直接传对象，模板里用）
    from flask import current_app
    course_list = current_app.extensions["course_list"]

    return render_template(
        "index.html",
        courses_data=course_list,
        selected_courses=selected_courses
    )