package gateway

// 本文件覆盖渠道配置写路径的 **patch 语义** —— 「凭据静默丢失」回归
// （实现见 admin_write_channel_config.go 与 runtimeconfig.PatchChannel）。
//
// 面板只携带用户本次碰过的平台字段，旧实现把 config 当作整条替换，
// 未被面板携带的键因此被静默抹掉：保存微信（iLink）账号卡会清掉
// bot_token/bot_id/owner_id/get_updates_buf（iLink token 是长期凭据），
// 给 Telegram 账号填 webhook_url 而不重填 token 会把整个账号
// 从 channels.json 里丢掉（cleanAccounts）。线上契约因此是三态：
//
//	键缺席          → 保留该账号已存值
//	给出非空值      → 覆盖该键
//	显式 null / ""  → 清除该键
//
// 用字面量 JSON 请求体断言线上形状（尤其是「完全没有 token 键」），
// 否则 map[string]any 会让断言从别处取值而通过。

import (
	"path/filepath"
	"testing"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/auth"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/config/runtimeconfig"
)

// storedChannelAccountOrNil 读取 channels.json 里某平台某 id 的账号；
// 不存在时返回 (零值, false)。
func storedChannelAccountOrNil(t *testing.T, path, platform, accountID string) (config.ChannelAccount, bool) {
	t.Helper()
	accounts, warn := runtimeconfig.LoadChannels(path, nil)
	if warn != nil {
		t.Fatalf("load channels warn = %v", warn)
	}
	for _, acct := range accounts[platform] {
		if acct.ID == accountID {
			return acct, true
		}
	}
	return config.ChannelAccount{}, false
}

// TestAdminSaveChannelConfigKeepsWeixinIlinkCredentials 是主回归：微信
// （iLink）账号卡的 PLATFORM_FIELDS 只有 cdn_base_url，保存它时请求体
// 里一个凭据键都没有。patch 语义下 bot_token/bot_id/owner_id/
// get_updates_buf 必须原样留在盘上 —— iLink token 是长期凭据，
// 被抹掉就等于掉线且不可恢复。
func TestAdminSaveChannelConfigKeepsWeixinIlinkCredentials(t *testing.T) {
	t.Parallel()
	path := filepath.Join(t.TempDir(), "channels.json")
	store := &stubChannelConfigStore{path: path, accounts: map[string][]config.ChannelAccount{
		"weixin-ilink": {{ID: "wx1", Config: map[string]any{
			"bot_token":       "ilink-long-lived-token",
			"bot_id":          "wxid_bot",
			"owner_id":        "wxid_owner",
			"get_updates_buf": "buf-42",
			"cdn_base_url":    "https://cdn.old",
		}}},
	}}
	_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
	tok := signAny(t, jwt, "acct", auth.RoleOwner)

	putChannelConfigRaw(t, ts, "weixin-ilink",
		`{"id":"wx1","config":{"cdn_base_url":"https://cdn.new"}}`, tok)

	acct, ok := storedChannelAccountOrNil(t, path, "weixin-ilink", "wx1")
	if !ok {
		t.Fatalf("weixin-ilink/wx1 vanished from channels.json after saving its card")
	}
	for key, want := range map[string]any{
		"bot_token":       "ilink-long-lived-token",
		"bot_id":          "wxid_bot",
		"owner_id":        "wxid_owner",
		"get_updates_buf": "buf-42",
		"cdn_base_url":    "https://cdn.new",
	} {
		if got := acct.Config[key]; got != want {
			t.Fatalf("config[%q] = %#v, want %#v (config=%v)", key, got, want, acct.Config)
		}
	}
}

// TestAdminSaveChannelConfigKeepsWeixinCredentialsOnEmptyPatch 是同一条
// 丢失口的真实触发形态：主人打开微信账号卡、**什么都没填**就点保存
// （面板于是既不发 config，也不发任何便捷字段）。整个请求不得
// 改变已存 config —— 既不能抹掉凭据，也不能写入 null 垃圾。
func TestAdminSaveChannelConfigKeepsWeixinCredentialsOnEmptyPatch(t *testing.T) {
	t.Parallel()
	stored := func() map[string][]config.ChannelAccount {
		return map[string][]config.ChannelAccount{
			"weixin-ilink": {{ID: "wx1", Config: map[string]any{
				"bot_token": "ilink-token", "bot_id": "wxid_bot", "owner_id": "wxid_owner",
			}}},
		}
	}
	for _, tc := range []struct{ name, body string }{
		{"没有 config 键", `{"id":"wx1"}`},
		{"config 显式 null", `{"id":"wx1","config":null}`},
		{"config 是空对象", `{"id":"wx1","config":{}}`},
	} {
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			// 每个子用例独占一个路径：并行写同一个临时文件会互相打架。
			path := filepath.Join(t.TempDir(), "channels.json")
			store := &stubChannelConfigStore{path: path, accounts: stored()}
			_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
			tok := signAny(t, jwt, "acct", auth.RoleOwner)

			putChannelConfigRaw(t, ts, "weixin-ilink", tc.body, tok)

			acct, ok := storedChannelAccountOrNil(t, path, "weixin-ilink", "wx1")
			if !ok {
				t.Fatalf("account vanished (body=%s)", tc.body)
			}
			for _, key := range []string{"bot_token", "bot_id", "owner_id"} {
				if got := acct.Config[key]; got == nil || got == "" {
					t.Fatalf("config[%q] = %#v, want the stored value kept (body=%s)", key, got, tc.body)
				}
			}
			for key, v := range acct.Config {
				if v == nil {
					t.Fatalf("config[%q] was written as JSON null (body=%s)", key, tc.body)
				}
			}
		})
	}
}

// TestAdminSaveChannelConfigKeepsTelegramAccountWhenTokenOmitted 覆盖第二条
// 丢失口：主人给已有的 Telegram 账号填 webhook_url 而不重填 token。
// 旧行为是整条替换 ⇒ bot_token 变空 ⇒ cleanAccounts 把**整个账号**
// 丢掉。patch 语义下该账号必须还在，且已存 token 不变。
func TestAdminSaveChannelConfigKeepsTelegramAccountWhenTokenOmitted(t *testing.T) {
	t.Parallel()
	path := filepath.Join(t.TempDir(), "channels.json")
	store := &stubChannelConfigStore{path: path, accounts: map[string][]config.ChannelAccount{
		"telegram": {{ID: "conf0", Config: map[string]any{"bot_token": "tg-stored-token"}}},
	}}
	_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
	tok := signAny(t, jwt, "acct", auth.RoleOwner)

	putChannelConfigRaw(t, ts, "telegram",
		`{"id":"conf0","config":{"webhook_url":"https://hook.example"}}`, tok)

	accounts, warn := runtimeconfig.LoadChannels(path, nil)
	if warn != nil {
		t.Fatalf("load channels warn = %v", warn)
	}
	list := accounts["telegram"]
	if len(list) != 1 {
		t.Fatalf("telegram = %+v, want the single existing account to survive", list)
	}
	if list[0].ID != "conf0" || list[0].Config["bot_token"] != "tg-stored-token" {
		t.Fatalf("telegram account = %+v, want conf0 with its stored token kept", list[0])
	}
	if list[0].Config["webhook_url"] != "https://hook.example" {
		t.Fatalf("webhook_url = %#v, want the newly sent value", list[0].Config["webhook_url"])
	}
}

// TestAdminSaveChannelConfigClearsConfigKeyExplicitly 保持「清空」能力：
// 显式 null 与显式 "" 都必须真的删掉该键（适配器随后回落到自己的
// 零值），而未触碰的兄弟键不受影响。
func TestAdminSaveChannelConfigClearsConfigKeyExplicitly(t *testing.T) {
	t.Parallel()
	path := filepath.Join(t.TempDir(), "channels.json")
	store := &stubChannelConfigStore{path: path, accounts: map[string][]config.ChannelAccount{
		"telegram": {{ID: "conf0", Config: map[string]any{
			"bot_token": "tg-stored-token", "webhook_url": "https://old.hook", "base_url": "https://old.api",
		}}},
	}}
	_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
	tok := signAny(t, jwt, "acct", auth.RoleOwner)

	// 显式 null → 清除。
	putChannelConfigRaw(t, ts, "telegram", `{"id":"conf0","config":{"webhook_url":null}}`, tok)
	acct, ok := storedChannelAccountOrNil(t, path, "telegram", "conf0")
	if !ok {
		t.Fatal("telegram/conf0 vanished after an explicit null")
	}
	if _, present := acct.Config["webhook_url"]; present {
		t.Fatalf("explicit null did not clear the key: %v", acct.Config)
	}
	if acct.Config["base_url"] != "https://old.api" || acct.Config["bot_token"] != "tg-stored-token" {
		t.Fatalf("sibling keys were touched by a single-key clear: %v", acct.Config)
	}

	// 显式 "" → 清除。
	putChannelConfigRaw(t, ts, "telegram", `{"id":"conf0","config":{"base_url":""}}`, tok)
	acct, ok = storedChannelAccountOrNil(t, path, "telegram", "conf0")
	if !ok {
		t.Fatal("telegram/conf0 vanished after an explicit \"\"")
	}
	if _, present := acct.Config["base_url"]; present {
		t.Fatalf("explicit \"\" did not clear the key: %v", acct.Config)
	}
	if acct.Config["bot_token"] != "tg-stored-token" {
		t.Fatalf("the token was lost while clearing another key: %v", acct.Config)
	}
}

// TestAdminSaveChannelConfigExplicitTokenClearStillDropsAccount 钉住 patch
// 与既有凭据保护的交互：token 要求型平台（kook/telegram）上**显式**
// 清掉 bot_token 仍然按 cleanAccounts 丢弃该账号 —— 这是主人明确要求
// 清除凭据，不是「未被触碰的键被误删」。本用例只记录现状，不改该行为。
func TestAdminSaveChannelConfigExplicitTokenClearStillDropsAccount(t *testing.T) {
	t.Parallel()
	path := filepath.Join(t.TempDir(), "channels.json")
	store := &stubChannelConfigStore{path: path, accounts: map[string][]config.ChannelAccount{
		"telegram": {
			{ID: "conf0", Config: map[string]any{"bot_token": "tg-token"}},
			{ID: "conf1", Config: map[string]any{"bot_token": "tg-other"}},
		},
	}}
	_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
	tok := signAny(t, jwt, "acct", auth.RoleOwner)

	putChannelConfigRaw(t, ts, "telegram", `{"id":"conf0","config":{"bot_token":null}}`, tok)

	accounts, warn := runtimeconfig.LoadChannels(path, nil)
	if warn != nil {
		t.Fatalf("load channels warn = %v", warn)
	}
	if _, ok := storedChannelAccountOrNil(t, path, "telegram", "conf0"); ok {
		t.Fatalf("telegram/conf0 = %+v, want it dropped after an explicit token clear", accounts["telegram"])
	}
	if len(accounts["telegram"]) != 1 || accounts["telegram"][0].ID != "conf1" {
		t.Fatalf("telegram = %+v, want only the untouched sibling conf1", accounts["telegram"])
	}
}

// TestAdminSaveChannelConfigCreatesAccountWithPatchOnly 覆盖无基线的新建：
// 没有已存条目时补丁本身就是配置（非空键写入，显式清除不留 null）。
func TestAdminSaveChannelConfigCreatesAccountWithPatchOnly(t *testing.T) {
	t.Parallel()
	path := filepath.Join(t.TempDir(), "channels.json")
	store := &stubChannelConfigStore{path: path, accounts: map[string][]config.ChannelAccount{}}
	_, ts, jwt := buildEnv(t, cfgDefault(), Deps{Channels: store})
	tok := signAny(t, jwt, "acct", auth.RoleOwner)

	// qq-obv11 不要求 token，因此新建账号不会被 cleanAccounts 丢掉。
	putChannelConfigRaw(t, ts, "qq-obv11",
		`{"id":"ob1","config":{"mode":"server","remote_url":"ws://127.0.0.1:3001"}}`, tok)
	acct, ok := storedChannelAccountOrNil(t, path, "qq-obv11", "ob1")
	if !ok {
		t.Fatal("a brand-new account was not created")
	}
	if acct.Config["mode"] != "server" || acct.Config["remote_url"] != "ws://127.0.0.1:3001" {
		t.Fatalf("new account config = %v, want the patch written verbatim", acct.Config)
	}

	// 全新账号 + 只有显式清除 → 不写 null 垃圾，账号照样建出来。
	putChannelConfigRaw(t, ts, "qq-obv11", `{"id":"ob2","config":{"mode":null}}`, tok)
	acct, ok = storedChannelAccountOrNil(t, path, "qq-obv11", "ob2")
	if !ok {
		t.Fatal("a new account carrying only clears was not created")
	}
	if _, present := acct.Config["mode"]; present {
		t.Fatalf("a clear on a brand-new account must not write the key: %v", acct.Config)
	}
}