package services

import (
	"testing"

	"server/models"
)

func strPtr(s string) *string { return &s }

func TestParsePlatforms(t *testing.T) {
	cases := []struct {
		name string
		raw  *string
		want int
	}{
		{"nil 视为全端", nil, 0},
		{"空串视为全端", strPtr(""), 0},
		{"空格视为全端", strPtr("  "), 0},
		{"单值 web", strPtr(`["web"]`), 1},
		{"双值", strPtr(`["web","app"]`), 2},
		{"大小写归一化", strPtr(`["WEB"]`), 1},
		{"非法 JSON 退化为单值", strPtr("web"), 1},
	}
	for _, c := range cases {
		got := ParsePlatforms(c.raw)
		if len(got) != c.want {
			t.Errorf("%s: got %d items (%v), want %d", c.name, len(got), got, c.want)
		}
	}
}

func TestHasPlatform(t *testing.T) {
	if !HasPlatform(nil, models.PlatformWeb) || !HasPlatform(nil, models.PlatformApp) {
		t.Error("未配置时应当全端可见")
	}
	web := []string{"web"}
	if !HasPlatform(web, "web") {
		t.Error("web 配置应在 web 端可见")
	}
	if HasPlatform(web, "app") {
		t.Error("web 配置不应在 app 端可见")
	}
	both := []string{"web", "app"}
	if !HasPlatform(both, "web") || !HasPlatform(both, "app") {
		t.Error("双端配置应两端都可见")
	}
}

func TestNormalizePlatforms(t *testing.T) {
	if got := NormalizePlatforms(nil); got != "" {
		t.Errorf("空输入应返回空串（表示全端），got %q", got)
	}
	if got := NormalizePlatforms([]string{"WEB", " app ", "web"}); got != `["web","app"]` {
		t.Errorf("应去重并小写归一化，got %q", got)
	}
}

// 模块级过滤：覆盖三种业务场景
func TestFilterModulesByPlatform(t *testing.T) {
	web := `["web"]`
	app := `["app"]`
	both := `["web","app"]`
	rows := []models.SystemModules{
		{Code: "crm", Platforms: &web},    // 仅 Web
		{Code: "oa", Platforms: &app},     // 仅小程序
		{Code: "cms", Platforms: &both},   // 双端
		{Code: "erp", Platforms: nil},     // 未配置 → 全端
	}

	got := FilterModulesByPlatform(rows, models.PlatformWeb)
	if len(got) != 3 {
		t.Errorf("Web 端应看到 crm/cms/erp 共 3 个，got %d", len(got))
	}
	gotApp := FilterModulesByPlatform(rows, models.PlatformApp)
	if len(gotApp) != 3 {
		t.Errorf("移动端应看到 oa/cms/erp 共 3 个，got %d", len(gotApp))
	}
}

func TestFilterMenusByPlatform(t *testing.T) {
	app := `["app"]`
	rows := []models.SystemMenu{
		{Title: "线索", Platforms: strPtr(`["web"]`)},
		{Title: "日程", Platforms: &app},
		{Title: "客户", Platforms: nil},
	}
	if got := FilterMenusByPlatform(rows, models.PlatformApp); len(got) != 2 {
		t.Errorf("移动端应看到 日程/客户 共 2 条，got %d", len(got))
	}
}