package sms

import (
	"strings"
	"testing"
)

func TestDefaultConfigCoversRegisteredNodes(t *testing.T) {
	cfg := DefaultConfig()
	if cfg.Enabled {
		t.Fatal("默认配置的总开关必须关闭，避免未配置模板就产生短信费用")
	}
	for _, meta := range NodeMetas() {
		node, ok := cfg.Node(meta.Code)
		if !ok {
			t.Fatalf("默认配置缺少节点 %s", meta.Code)
		}
		if !node.Enabled {
			t.Fatalf("默认配置节点 %s 应默认启用", meta.Code)
		}
		if node.TemplateCode != "" {
			t.Fatalf("默认配置节点 %s 的模板 CODE 应为空，实际 %q", meta.Code, node.TemplateCode)
		}
	}
	if days := cfg.StaleDaysFor(NodeListingStalePriceSuggestion); days != DefaultStaleDays {
		t.Fatalf("StaleDaysFor() = %d, want %d", days, DefaultStaleDays)
	}
}

func TestParseConfigValueMergesAndFiltersUnknownNodes(t *testing.T) {
	cfg, err := ParseConfigValue(`{
		"enabled": true,
		"nodes": {
			"order_handoff_assist": {"enabled": true, "template_code": " SMS_512540945 "},
			"listing_stale_price_suggestion": {"enabled": false, "template_code": "SMS_1", "stale_days": 5},
			"not_registered_node": {"enabled": true, "template_code": "SMS_BAD"}
		}
	}`)
	if err != nil {
		t.Fatalf("ParseConfigValue() error = %v", err)
	}
	if !cfg.Enabled {
		t.Fatal("ParseConfigValue() 应保留总开关")
	}
	if _, ok := cfg.Node("not_registered_node"); ok {
		t.Fatal("ParseConfigValue() 不应保留未登记节点")
	}
	node, ok := cfg.Node(NodeOrderHandoffAssist)
	if !ok || node.TemplateCode != "SMS_512540945" {
		t.Fatalf("handoff node = %+v, want template trimmed to SMS_512540945", node)
	}
	// 未在 JSON 中出现的已登记节点应保留默认值。
	rejected, ok := cfg.Node(NodeListingReviewRejected)
	if !ok || !rejected.Enabled {
		t.Fatalf("未配置节点应保留默认值, got %+v ok=%v", rejected, ok)
	}
	stale, _ := cfg.Node(NodeListingStalePriceSuggestion)
	if stale.StaleDays != 5 {
		t.Fatalf("stale_days = %d, want 5", stale.StaleDays)
	}
}

func TestParseConfigValueEmptyAndInvalid(t *testing.T) {
	cfg, err := ParseConfigValue("   ")
	if err != nil {
		t.Fatalf("空配置不应报错: %v", err)
	}
	if cfg.Enabled {
		t.Fatal("空配置应回落到默认（总开关关闭）")
	}

	if _, err := ParseConfigValue("{not json}"); err == nil {
		t.Fatal("非法 JSON 应返回错误")
	}
}

func TestMarshalConfigNormalizes(t *testing.T) {
	raw, err := MarshalConfig(Config{
		Enabled: true,
		Nodes: map[string]NodeConfig{
			NodeListingReviewRejected:       {Enabled: true, TemplateCode: " SMS_512520993 ", StaleDays: -3},
			"unknown_node":                  {Enabled: true, TemplateCode: "SMS_X"},
			NodeListingStalePriceSuggestion: {Enabled: true, TemplateCode: "SMS_512620985", StaleDays: 0},
		},
	})
	if err != nil {
		t.Fatalf("MarshalConfig() error = %v", err)
	}
	if strings.Contains(raw, "unknown_node") {
		t.Fatalf("MarshalConfig() 不应输出未登记节点: %s", raw)
	}
	parsed, err := ParseConfigValue(raw)
	if err != nil {
		t.Fatalf("ParseConfigValue() error = %v", err)
	}
	rejected, _ := parsed.Node(NodeListingReviewRejected)
	if rejected.TemplateCode != "SMS_512520993" {
		t.Fatalf("template_code = %q, want SMS_512520993", rejected.TemplateCode)
	}
	if rejected.StaleDays != 0 {
		t.Fatalf("负的 stale_days 应被归零, got %d", rejected.StaleDays)
	}
	if days := parsed.StaleDaysFor(NodeListingStalePriceSuggestion); days != DefaultStaleDays {
		t.Fatalf("stale_days=0 时应回落默认值 %d, got %d", DefaultStaleDays, days)
	}
}

func TestConfigNodeActive(t *testing.T) {
	base := Config{
		Enabled: true,
		Nodes: map[string]NodeConfig{
			NodeListingReviewRejected:       {Enabled: true, TemplateCode: "SMS_512520993"},
			NodeOrderHandoffAssist:          {Enabled: false, TemplateCode: "SMS_512540945"},
			NodeListingStalePriceSuggestion: {Enabled: true, TemplateCode: ""},
		},
	}
	if !base.NodeActive(NodeListingReviewRejected) {
		t.Fatal("总开关与节点开关都开且模板非空时应可发送")
	}
	if base.NodeActive(NodeOrderHandoffAssist) {
		t.Fatal("节点关闭时不应发送")
	}
	if base.NodeActive(NodeListingStalePriceSuggestion) {
		t.Fatal("模板 CODE 为空时不应发送")
	}
	if base.NodeActive("unknown_node") {
		t.Fatal("未登记节点不应发送")
	}

	disabled := base
	disabled.Enabled = false
	if disabled.NodeActive(NodeListingReviewRejected) {
		t.Fatal("总开关关闭时不应发送")
	}
}

func TestIsKnownNode(t *testing.T) {
	for _, code := range []string{
		NodeListingReviewRejected,
		NodeOrderHandoffAssist,
		NodeListingStalePriceSuggestion,
	} {
		if !IsKnownNode(code) {
			t.Fatalf("IsKnownNode(%q) = false, want true", code)
		}
	}
	if IsKnownNode("") || IsKnownNode("nope") {
		t.Fatal("未登记节点应为 false")
	}
}