package main

import (
	"encoding/json"
	"strings"
	"testing"
)

// t26：暱稱 > email > 未設定（leo 07-24 拍板：CF 全程隱形，這條邏輯不該提到 cypher/CF）。
func TestConnectionStatusLabel(t *testing.T) {
	cases := []struct {
		name         string
		instanceName string
		email        string
		want         string
	}{
		{"暱稱優先於email", "我的書房", "leo21c@gmail.com", "連線中：我的書房"},
		{"無暱稱退回email", "", "leo21c@gmail.com", "連線中：leo21c@gmail.com"},
		{"兩者皆空顯示未設定", "", "", "連線中：未設定"},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			got := connectionStatusLabel(c.instanceName, c.email)
			if got != c.want {
				t.Errorf("connectionStatusLabel(%q, %q) = %q, want %q", c.instanceName, c.email, got, c.want)
			}
		})
	}
}

func TestShortCypherHost(t *testing.T) {
	cases := []struct {
		name string
		in   string
		want string
	}{
		{"完整URL取host", "https://arcrun-cypher-executor.someacct.workers.dev/path", "arcrun-cypher-executor.someacct.workers.dev"},
		{"空字串回空字串", "", ""},
		{"無法解析出host則原樣回傳", "not-a-url", "not-a-url"},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			got := shortCypherHost(c.in)
			if got != c.want {
				t.Errorf("shortCypherHost(%q) = %q, want %q", c.in, got, c.want)
			}
		})
	}
}

// config 序列化含新欄（email／instance_name）——t26 施工面一驗收項。
func TestDirectConfigJSONRoundTrip(t *testing.T) {
	c := &directConfig{
		CypherURL:    "https://example.workers.dev",
		Namespace:    "demo",
		Email:        "leo21c@gmail.com",
		InstanceName: "我的書房",
	}
	data, err := json.Marshal(c)
	if err != nil {
		t.Fatalf("marshal 失敗：%v", err)
	}
	s := string(data)
	if !strings.Contains(s, `"email":"leo21c@gmail.com"`) {
		t.Errorf("序列化結果缺 email 欄：%s", s)
	}
	if !strings.Contains(s, `"instance_name":"我的書房"`) {
		t.Errorf("序列化結果缺 instance_name 欄：%s", s)
	}

	var back directConfig
	if err := json.Unmarshal(data, &back); err != nil {
		t.Fatalf("unmarshal 失敗：%v", err)
	}
	if back.Email != c.Email || back.InstanceName != c.InstanceName {
		t.Errorf("round-trip 不一致：got email=%q instance_name=%q", back.Email, back.InstanceName)
	}
}

// 暱稱空時 config JSON 不應寫出 instance_name 欄（omitempty；對齊面二 installer 端「空就不寫欄位」的約定）。
func TestDirectConfigJSONOmitsEmptyInstanceName(t *testing.T) {
	c := &directConfig{
		CypherURL: "https://example.workers.dev",
		Namespace: "demo",
		Email:     "leo21c@gmail.com",
	}
	data, err := json.Marshal(c)
	if err != nil {
		t.Fatalf("marshal 失敗：%v", err)
	}
	if strings.Contains(string(data), "instance_name") {
		t.Errorf("暱稱空時不該序列化出 instance_name 欄：%s", data)
	}
}

// ── t86：instanceChanged ─────────────────────────────────────────────────────

func TestInstanceChanged(t *testing.T) {
	cases := []struct {
		name   string
		oldURL string
		newURL string
		want   bool
	}{
		{
			"同 host 同實例改密碼不觸發清空",
			"https://arcrun-cypher-executor.youlin.workers.dev",
			"https://arcrun-cypher-executor.youlin.workers.dev",
			false,
		},
		{
			"不同 host 換實例觸發清空",
			"https://arcrun-cypher-executor.youlin.workers.dev",
			"https://arcrun-cypher-executor.geek6688.workers.dev",
			true,
		},
		{
			"舊 URL 空（首次設定）不觸發清空",
			"",
			"https://arcrun-cypher-executor.geek6688.workers.dev",
			false,
		},
		{
			"新 URL 空（異常值）不觸發清空",
			"https://arcrun-cypher-executor.youlin.workers.dev",
			"",
			false,
		},
	}
	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			got := instanceChanged(c.oldURL, c.newURL)
			if got != c.want {
				t.Errorf("instanceChanged(%q, %q) = %v, want %v", c.oldURL, c.newURL, got, c.want)
			}
		})
	}
}

// t86：換實例後 applyRemoteConfig 清空資料夾清單
func TestApplyRemoteConfigClearsFoldersOnInstanceSwitch(t *testing.T) {
	cfg := &directConfig{
		CypherURL:    "https://arcrun-cypher-executor.youlin.workers.dev",
		Namespace:    "youlin",
		WatchFolder:  "/Users/youlin/KnowledgeBase",
		WatchFolders: []string{"/Users/youlin/KnowledgeBase", "/Users/youlin/Finance"},
	}
	r := &daemonConfigResp{}
	r.Config.CypherURL = "https://arcrun-cypher-executor.geek6688.workers.dev"
	r.Config.Namespace = "geek6688"

	switched := applyRemoteConfig(cfg, r)

	if !switched {
		t.Error("換了不同 host 應回傳 switched=true")
	}
	if cfg.WatchFolder != "" {
		t.Errorf("換實例後 WatchFolder 應清空，got %q", cfg.WatchFolder)
	}
	if len(cfg.WatchFolders) != 0 {
		t.Errorf("換實例後 WatchFolders 應清空，got %v", cfg.WatchFolders)
	}
}

// t86：同實例改密碼不清空資料夾清單
func TestApplyRemoteConfigKeepsFoldersOnSameInstance(t *testing.T) {
	cfg := &directConfig{
		CypherURL:    "https://arcrun-cypher-executor.youlin.workers.dev",
		Namespace:    "youlin",
		WatchFolder:  "/Users/youlin/KnowledgeBase",
		WatchFolders: []string{"/Users/youlin/KnowledgeBase"},
	}
	r := &daemonConfigResp{}
	r.Config.CypherURL = "https://arcrun-cypher-executor.youlin.workers.dev"
	r.Config.Namespace = "youlin"

	switched := applyRemoteConfig(cfg, r)

	if switched {
		t.Error("同 host 不應回傳 switched=true")
	}
	if cfg.WatchFolder == "" || len(cfg.WatchFolders) == 0 {
		t.Error("同實例不應清空資料夾清單")
	}
}