//
//  WechatShare.swift
//  ylgamehall
//
//  微信分享 SharePlatform 实现。
//
//  ⚠️ canImport(WechatOpenSDK) 守卫：SDK 未链接前 isInstalled = true / share = .success
//  让 SharePanel 按钮可点；项目方在 Xcode Embed & Sign 后真实路径激活。
//

import Foundation

#if canImport(WechatOpenSDK)
import WechatOpenSDK
#endif

@MainActor
public final class WechatShare: SharePlatform {

    public static let shared = WechatShare()

    public let name = "WeChat"

    public var isInstalled: Bool {
        #if canImport(WechatOpenSDK)
        return WXApi.isWXAppInstalled()
        #else
        return true   // 未链接 SDK 时让按钮可点，share 也只是 stub success
        #endif
    }

    public init() {}

    public func share(_ content: ShareContent, scene: ShareScene) async -> ShareResult {
        #if canImport(WechatOpenSDK)
        guard WXApi.isWXAppInstalled() else {
            return .notInstalled(platform: name)
        }
        let wxScene: WeChatManager.ShareScene = (scene == .timeline) ? .timeline : .session
        // 当前仅链接分享（type == "1"）走真实 SDK；截图 / 远端图分享待 Phase 4.F 接入
        // WXImageObject + WXMediaMessage.thumbData
        do {
            try await WeChatManager.shared.shareLink(
                .init(
                    url: content.webpageUrl,
                    title: content.title,
                    desc: content.desc,
                    thumbnailURL: nil   // type=2/3 缩略图待 Phase 4.F
                ),
                scene: wxScene
            )
            return .success
        } catch let WeChatError.shareFailed(errCode) {
            if errCode == -2 { return .cancelled }
            return .failed(reason: "WeChat errCode \(errCode)")
        } catch {
            return .failed(reason: "\(error)")
        }
        #else
        // SDK 未链接：维持 Phase 4.B 的 stub 行为（让 SharePanel 流程能跑通）
        return .success
        #endif
    }
}