package service

import (
	"strings"
	"testing"
)

func TestParseAnalysisResponse(t *testing.T) {
	cases := []struct {
		name      string
		in        string
		wantRetry bool
		wantErr   bool
	}{
		{"纯JSON", `{"retryable": true, "reason": "限流"}`, true, false},
		{"带json代码块", "```json\n{\"retryable\": false, \"reason\": \"参数错误\"}\n```", false, false},
		{"带前后文字", `分析结果: {"retryable": true, "reason": "瞬时故障"} 完毕`, true, false},
		{"非法响应", `抱歉，我无法分析`, false, true},
		{"空串", ``, false, true},
	}
	for _, c := range cases {
		retry, _, err := parseAnalysisResponse(c.in)
		if c.wantErr {
			if err == nil {
				t.Fatalf("[%s] 期望错误, got retry=%v", c.name, retry)
			}
			continue
		}
		if err != nil {
			t.Fatalf("[%s] 不应报错: %v", c.name, err)
		}
		if retry != c.wantRetry {
			t.Fatalf("[%s] retryable = %v, want %v", c.name, retry, c.wantRetry)
		}
	}
}

func TestParseAnalysisResponseReason(t *testing.T) {
	_, reason, err := parseAnalysisResponse(`{"retryable": true, "reason": "服务过载"}`)
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if reason != "服务过载" {
		t.Fatalf("reason = %q, want 服务过载", reason)
	}
}

func TestBuildAnalysisBody(t *testing.T) {
	body := buildAnalysisBody("doubao-lite", "429", "too many", strings.Repeat("x", 5000))
	msg := body["messages"].([]map[string]string)[1]
	if len(msg["content"]) >= 2000+len("429")+len("too many")+100 {
		t.Fatalf("响应体应被截断到2000字符, got %d", len(msg["content"]))
	}
	if body["model"] != "doubao-lite" {
		t.Fatalf("model 字段错误")
	}
	if body["temperature"] != 0 {
		t.Fatalf("temperature 应为0")
	}
}

func TestTruncateStr(t *testing.T) {
	if truncateStr("abc", 5) != "abc" {
		t.Fatalf("短串不应截断")
	}
	if truncateStr("abcdef", 3) != "abc" {
		t.Fatalf("截断错误")
	}
}