import CoreCommon
import CoreDomain
import CoreModel

/// Fake 首页仓库（骨架阶段返回假数据，后续替换为 OfflineFirst 实现）。
public struct FakeHomeRepository: HomeRepository {
    public init() {}

    public func observeHome() -> AsyncThrowingStream<HomeData, Error> {
        stream(Self.loggedInData)
    }

    public func observeGuestHome() -> AsyncThrowingStream<HomeData, Error> {
        stream(Self.guestData)
    }

    private func stream(_ data: HomeData) -> AsyncThrowingStream<HomeData, Error> {
        AsyncThrowingStream { continuation in
            let task = Task {
                do {
                    // 模拟网络延迟。
                    try await Task.sleep(for: .milliseconds(400))
                    try Task.checkCancellation()
                    Logger.info("FakeHomeRepository 返回假数据")
                    continuation.yield(data)
                    continuation.finish()
                } catch {
                    continuation.finish(throwing: error)
                }
            }
            continuation.onTermination = { _ in
                task.cancel()
            }
        }
    }

    private static let modules = [
        HomeModule(id: "checkin", emoji: "📋", title: "打卡介绍", description: "每日打卡记录", destination: .checkin),
        HomeModule(id: "plan", emoji: "📝", title: "计划介绍", description: "周/月/年计划", destination: .plan),
        HomeModule(id: "about", emoji: "ℹ️", title: "关于我们", description: "了解明缘云道场", destination: .about),
    ]

    private static let intros = [
        IntroCard(title: "📚 学习成长工具", body: "明缘云道场是一款专注于个人成长的效率工具，通过每周打卡与计划管理，帮助你养成良好的学习习惯，实现持续进步。好好学习，天天向上。"),
        IntroCard(title: "✅ 周打卡", body: "每周打卡，支持多种状态记录（正常、迟到、请假、早退、不参加讨论等）。查看小组打卡情况，与同学们互相监督、共同进步。"),
        IntroCard(title: "📝 计划管理", body: "提供周计划、月计划、年计划三级管理，支持文字与图片上传。清晰追踪每个周期的目标完成情况，让成长有迹可循。"),
        IntroCard(title: "👥 小组共学", body: "加入学习小组，查看组员的打卡与计划完成情况。在集体的氛围中保持学习动力，与志同道合的伙伴一起成长。"),
    ]

    private static let guestData = HomeData(
        greeting: "欢迎来到明缘云道场",
        displayName: "游客",
        encouragement: "登录后即可打卡、提交计划",
        modules: modules,
        intros: intros
    )

    private static let loggedInData = HomeData(
        greeting: "晚上好",
        displayName: "张三",
        encouragement: "坚持每周打卡，与小组共同进步。",
        modules: modules,
        intros: intros
    )
}