/**
 * 第 10 章配套代码 · 全局 Store 集合
 *
 * 文件位置：shared/src/commonMain/kotlin/com/example/xhs/store/Stores.kt
 *
 * 演示如何用全局 object 装 observable 字段，实现「跨 Pager 状态共享」。
 *
 * 类比：Vue Pinia / React Zustand / Android ViewModel + StateFlow
 */

package com.example.xhs.store

import com.example.xhs.api.NoteApi
import com.example.xhs.pages.Note
import com.tencent.kuikly.core.module.SharedPreferencesModule
import com.tencent.kuikly.core.module.ToastModule
import com.tencent.kuikly.core.pager.Pager
import com.tencent.kuikly.core.reactive.collection.observableListOf
import com.tencent.kuikly.core.reactive.handler.observable

// ═══════════════════════════════════════════════════════════════════
// 用户 Store
// ═══════════════════════════════════════════════════════════════════
object UserStore {

    var loggedIn by observable(false)
    var userId by observable("")
    var nickname by observable("")
    var avatar by observable("")
    var bio by observable("")
    var followingCount by observable(0)
    var followersCount by observable(0)
    var likesCount by observable(0)

    fun login(uid: String, name: String, av: String, b: String = "") {
        userId = uid
        nickname = name
        avatar = av
        bio = b
        loggedIn = true
    }

    fun logout() {
        loggedIn = false
        userId = ""; nickname = ""; avatar = ""; bio = ""
        followingCount = 0; followersCount = 0; likesCount = 0
    }
}

// ═══════════════════════════════════════════════════════════════════
// 主题 Store
// ═══════════════════════════════════════════════════════════════════
object ThemeStore {
    var darkMode by observable(false)
    fun toggle() { darkMode = !darkMode }
}

// ═══════════════════════════════════════════════════════════════════
// 笔记 Store
// ═══════════════════════════════════════════════════════════════════
object NoteStore {

    val notes = observableListOf<Note>()
    var loading by observable(false)
    var page = 1
    var hasMore by observable(true)

    fun refresh(onDone: () -> Unit = {}) {
        if (loading) return
        loading = true
        page = 1
        NoteApi.fetchNotes(page = 1) { list ->
            notes.clear()
            notes.addAll(list)
            hasMore = list.isNotEmpty()
            loading = false
            onDone()
        }
    }

    fun loadMore(onDone: () -> Unit = {}) {
        if (loading || !hasMore) return
        loading = true
        page++
        NoteApi.fetchNotes(page) { list ->
            if (list.isEmpty()) {
                hasMore = false
            } else {
                notes.addAll(list)
            }
            loading = false
            onDone()
        }
    }

    /**
     * 切换某条笔记的点赞态：演示 data class.copy() 替换 item
     */
    fun toggleLike(noteId: String) {
        val idx = notes.indexOfFirst { it.id == noteId }
        if (idx < 0) return
        val n = notes[idx]
        notes[idx] = n.copy(
            liked = !n.liked,
            likes = if (n.liked) n.likes - 1 else n.likes + 1,
        )
    }
}

// ═══════════════════════════════════════════════════════════════════
// Tab Store
// ═══════════════════════════════════════════════════════════════════
object TabStore {
    var currentTab by observable("home")
}