package top.yeij.hearth.webview

import android.util.Log
import top.yeij.hearth.app.AppRepository
import top.yeij.hearth.card.Card
import top.yeij.hearth.card.CardRepository
import top.yeij.hearth.media.MediaSessionSource
import top.yeij.hearth.webapp.WebApp
import top.yeij.hearth.webapp.WebAppRepository

class JsBridge(
    private val deviceWidthPx: Int,
    private val deviceHeightPx: Int,
    private val density: Float,
    private val darkMode: Boolean,
    private val appRepository: AppRepository? = null,
    private val webAppRepository: WebAppRepository? = null,
    private val cardRepository: CardRepository? = null,
) {
    private val gson = com.google.gson.Gson()

    @android.webkit.JavascriptInterface
    fun getDeviceInfo(): String {
        Log.d("HearthBridge", "getDeviceInfo called")
        return gson.toJson(
            mapOf(
                "widthPx" to deviceWidthPx,
                "heightPx" to deviceHeightPx,
                "density" to density,
                "darkMode" to darkMode
            )
        )
    }

    // 返回已安装应用列表 JSON（无仓库时返回空数组）
    // Return installed app list JSON (empty array when no repository wired)
    @android.webkit.JavascriptInterface
    fun listApps(): String = appRepository?.listApps() ?: "[]"

    // 启动指定包名应用，成功返回 true（无仓库时返回 false）
    // Launch an app by package name, true on success (false when no repository wired)
    @android.webkit.JavascriptInterface
    fun launchApp(packageName: String): Boolean = appRepository?.launchApp(packageName) ?: false

    // 返回 H5 应用清单 JSON（无仓库时返回空数组）
    // Return the H5 web app manifest JSON (empty array when no repository wired)
    @android.webkit.JavascriptInterface
    fun fetchWebApps(): String = gson.toJson(webAppRepository?.fetchManifest() ?: emptyList<WebApp>())

    // 返回首页卡片目录 JSON（无仓库时返回空数组；有仓库时由 fetchCatalog 保证内置 time 卡）
    // Return the home card catalog JSON (empty array when no repository wired;
    // fetchCatalog guarantees the builtin time card when wired)
    @android.webkit.JavascriptInterface
    fun fetchCards(): String {
        val cards = cardRepository?.fetchCatalog() ?: emptyList<Card>()
        Log.d("HearthBridge", "fetchCards: ${cards.size} cards")
        return gson.toJson(cards)
    }

    // 注册媒体会话监听，回调推送给 H5（info 为 null 时推 "null"）
    // Register media session listener; push callbacks to H5 (push "null" when info is null)
    fun setMediaListener(source: MediaSessionSource, webView: android.webkit.WebView) {
        source.start { info ->
            webView.post {
                val json = info?.toJson() ?: "null"
                webView.evaluateJavascript(
                    "window.HearthEvents && window.HearthEvents.mediaSessionChanged($json);",
                    null
                )
            }
        }
    }
}