package weixin_ilink

import (
	"context"
	"errors"
	"testing"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/channel/adapter"
)

func TestAdapter_Name_And_DefaultCapabilities(t *testing.T) {
	t.Parallel()
	ad, err := New(Config{BaseURL: "https://ilinkai.weixin.qq.com"}, nil, nil)
	if err != nil {
		t.Fatalf("New: %v", err)
	}
	if got := ad.Name(); got != "weixin-ilink" {
		t.Fatalf("Name() = %q, want weixin-ilink", got)
	}
	caps := ad.Capabilities()
	if !caps.Proactive {
		t.Error("Capabilities().Proactive = false, want true (iLink has a 24h window)")
	}
	if !caps.Image {
		t.Error("Capabilities().Image = false, want true")
	}
	if got := caps.Normalize().MaxMessageLength; got <= 0 {
		t.Fatalf("MaxMessageLength = %d, want > 0", got)
	}
}

func TestAdapter_New_RejectsBadBaseURL(t *testing.T) {
	t.Parallel()
	_, err := New(Config{BaseURL: "not-a-url"}, nil, nil)
	if !errors.Is(err, ErrInvalidConfig) {
		t.Fatalf("err = %v, want ErrInvalidConfig", err)
	}
}

func TestAdapter_Config_ReturnsSnapshot(t *testing.T) {
	t.Parallel()
	ad, err := New(Config{BaseURL: "https://ilinkai.weixin.qq.com", BotID: "bot-1"}, nil, nil)
	if err != nil {
		t.Fatalf("New: %v", err)
	}
	cfg := ad.Config()
	if cfg["bot_id"] != "bot-1" {
		t.Fatalf("Config()[bot_id] = %v, want bot-1", cfg["bot_id"])
	}
	if cfg["base_url"] != "https://ilinkai.weixin.qq.com" {
		t.Fatalf("Config()[base_url] = %v", cfg["base_url"])
	}
	// 经 DecodeConfig 往返必须保留类型化配置。
	var back Config
	if err := adapter.DecodeConfig(cfg, &back); err != nil {
		t.Fatalf("DecodeConfig: %v", err)
	}
	if back.BaseURL != "https://ilinkai.weixin.qq.com" || back.BotID != "bot-1" {
		t.Fatalf("decoded config = %+v, want base_url/bot_id preserved", back)
	}
}

func TestAdapter_Connect_WithToken_IsIdempotent(t *testing.T) {
	t.Parallel()
	ad, err := New(Config{BaseURL: "https://ilinkai.weixin.qq.com", BotToken: "tok-1"}, nil, nil)
	if err != nil {
		t.Fatalf("New: %v", err)
	}
	if ad.IsConnected() {
		t.Fatal("IsConnected() = true before Connect")
	}
	if err := ad.Connect(context.Background()); err != nil {
		t.Fatalf("Connect: %v", err)
	}
	if !ad.IsConnected() {
		t.Fatal("IsConnected() = false after Connect")
	}
	// 第二次调用是无副作用的成功。
	if err := ad.Connect(context.Background()); err != nil {
		t.Fatalf("second Connect: %v", err)
	}
}

func TestAdapter_HealthCheck(t *testing.T) {
	t.Parallel()
	t.Run("disconnected", func(t *testing.T) {
		t.Parallel()
		ad, _ := New(Config{BaseURL: "https://ilinkai.weixin.qq.com"}, nil, nil)
		if err := ad.HealthCheck(context.Background()); !errors.Is(err, adapter.ErrNotConnected) {
			t.Fatalf("HealthCheck = %v, want ErrNotConnected", err)
		}
	})
	t.Run("connected_with_token", func(t *testing.T) {
		t.Parallel()
		ad, _ := New(Config{BaseURL: "https://ilinkai.weixin.qq.com", BotToken: "tok-1"}, nil, nil)
		if err := ad.Connect(context.Background()); err != nil {
			t.Fatalf("Connect: %v", err)
		}
		if err := ad.HealthCheck(context.Background()); err != nil {
			t.Fatalf("HealthCheck = %v, want nil", err)
		}
	})
}

func TestAdapter_Disconnect_IsIdempotent(t *testing.T) {
	t.Parallel()
	ad, _ := New(Config{BaseURL: "https://ilinkai.weixin.qq.com", BotToken: "tok-1"}, nil, nil)
	_ = ad.Connect(context.Background())
	if err := ad.Disconnect(context.Background()); err != nil {
		t.Fatalf("Disconnect: %v", err)
	}
	if ad.IsConnected() {
		t.Fatal("IsConnected() = true after Disconnect")
	}
	if err := ad.Disconnect(context.Background()); err != nil {
		t.Fatalf("second Disconnect: %v", err)
	}
}

func TestAdapter_ListChannels(t *testing.T) {
	t.Parallel()
	ad, _ := New(Config{BaseURL: "https://ilinkai.weixin.qq.com", BotID: "bot-9"}, nil, nil)
	chans, err := ad.ListChannels(context.Background())
	if err != nil {
		t.Fatalf("ListChannels: %v", err)
	}
	if len(chans) != 1 {
		t.Fatalf("ListChannels() = %d channels, want 1", len(chans))
	}
	if chans[0].ChannelID != "bot-9" || chans[0].ChannelType != adapter.ChannelDirect {
		t.Fatalf("channel = %+v, want {bot-9 direct}", chans[0])
	}
}

func TestAdapter_SetMessageHandler_And_RecordInbound(t *testing.T) {
	t.Parallel()
	ad, _ := New(Config{BaseURL: "https://ilinkai.weixin.qq.com"}, nil, nil)

	called := false
	ad.SetMessageHandler(func(ctx context.Context, m adapter.UnifiedMessage) { called = true })
	if ad.handlerLocked() == nil {
		t.Fatal("handlerLocked() = nil after SetMessageHandler")
	}
	ad.SetMessageHandler(nil)
	if ad.handlerLocked() != nil {
		t.Fatal("handlerLocked() != nil after clearing")
	}
	if called {
		t.Fatal("handler called before any message")
	}

	// recordInbound 必须刷新按对端的 token 与最后消息时间。
	ad.recordInbound("tok-abc", adapter.UnifiedMessage{
		SenderID:  "user-1",
		Timestamp: ad.clock(),
	})
	if got := ad.contextFor("user-1"); got != "tok-abc" {
		t.Fatalf("contextFor(user-1) = %q, want tok-abc", got)
	}
}

func TestBuildClientVersion(t *testing.T) {
	t.Parallel()
	cases := map[string]string{
		"2.4.8":  "132104", // 官方 @tencent-weixin/openclaw-weixin 2.4.8
		"1.0.11": "65547",  // 官方注释示例 0x0001000B
		"1.2.3":  "66051",
		"0.0.0":  "0",
		"bad":    "0",
	}
	for in, want := range cases {
		if got := buildClientVersion(in); got != want {
			t.Fatalf("buildClientVersion(%q) = %q, want %q", in, got, want)
		}
	}
}

func TestAdapter_Recipient_ResolvesGroupAndSender(t *testing.T) {
	t.Parallel()
	tests := []struct {
		name      string
		msg       adapter.UnifiedMessage
		wantPeer  string
		wantGroup bool
	}{
		{name: "direct sender", msg: adapter.UnifiedMessage{SenderID: "u1"}, wantPeer: "u1"},
		{name: "group id", msg: adapter.UnifiedMessage{ChannelType: adapter.ChannelGroup, GroupID: "g1"}, wantPeer: "g1", wantGroup: true},
		{name: "default channel id", msg: adapter.UnifiedMessage{ChannelID: "c1"}, wantPeer: "c1"},
	}
	for _, tc := range tests {
		tc := tc
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			peer, group := recipient(tc.msg)
			if peer != tc.wantPeer || group != tc.wantGroup {
				t.Fatalf("recipient() = (%q,%v), want (%q,%v)", peer, group, tc.wantPeer, tc.wantGroup)
			}
		})
	}
}