import type {
	CourseCategory,
	CourseFlowProgress,
	CourseResource,
	CourseResourceCategory,
} from "./CourseDemo.types";

export const courseResources: CourseResource[] = [
	{
		id: "policy-video",
		title: "资助政策微课",
		description: "了解国家助学政策和申请条件",
		category: "policy",
		icon: "🎬",
	},
	{
		id: "policy-guide",
		title: "申请流程图",
		description: "按步骤核对材料与办理节点",
		category: "policy",
		icon: "🗺️",
	},
	{
		id: "practice-case",
		title: "诚信申请案例",
		description: "判断案例中的规范与风险",
		category: "practice",
		icon: "🧩",
	},
	{
		id: "practice-checklist",
		title: "材料自查清单",
		description: "动手检查课程中的模拟材料",
		category: "practice",
		icon: "✅",
	},
	{
		id: "support-qa",
		title: "常见问题答疑",
		description: "查找填报和审核中的常见问题",
		category: "support",
		icon: "💬",
	},
	{
		id: "support-contact",
		title: "校园咨询渠道",
		description: "联系辅导员与学生资助中心",
		category: "support",
		icon: "☎️",
	},
];

export const courseCategories: CourseCategory[] = [
	{
		id: "policy",
		title: "政策学习",
		description: "帮助理解政策与办理流程",
		icon: "📚",
	},
	{
		id: "practice",
		title: "互动实践",
		description: "需要判断、检查或动手完成",
		icon: "🧠",
	},
	{
		id: "support",
		title: "学习支持",
		description: "遇到问题时可以随时查阅",
		icon: "🤝",
	},
];

export function createEmptyProgress(): CourseFlowProgress {
	return {
		placed: { policy: [], practice: [], support: [] },
		completed: false,
		updatedAt: new Date().toISOString(),
	};
}

export function parseProgress(content: string): CourseFlowProgress | null {
	try {
		const value = JSON.parse(content) as Partial<CourseFlowProgress>;
		if (!value.placed || typeof value.placed !== "object") return null;
		const placed = Object.fromEntries(
			courseCategories.map(({ id }) => [
				id,
				Array.isArray(value.placed?.[id])
					? value.placed[id].filter((item): item is string =>
							courseResources.some(
								(resource) => resource.id === item && resource.category === id,
							),
						)
					: [],
			]),
		) as Record<CourseResourceCategory, string[]>;
		const placedCount = Object.values(placed).flat().length;
		return {
			placed,
			completed: placedCount === courseResources.length,
			updatedAt: value.updatedAt ?? new Date().toISOString(),
		};
	} catch {
		return null;
	}
}