package service

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

func TestRuleRequiresThreeContinuousDaysOfHumidity(t *testing.T) {
	now := time.Date(2026, 8, 14, 12, 0, 0, 0, time.UTC)
	samples := []TelemetrySample{
		{Metric: "humidity", Value: 85, Timestamp: now.Add(-72 * time.Hour)},
		{Metric: "humidity", Value: 83, Timestamp: now.Add(-48 * time.Hour)},
		{Metric: "humidity", Value: 82, Timestamp: now.Add(-24 * time.Hour)},
	}
	results := EvaluateRules(RuleContext{Now: now, Samples: samples}, []RuleVersion{{
		Version: "env-v2", Name: "continuous_humidity", Disease: "白僵病", WindowHours: 3, MaxStaleness: 100 * time.Hour,
	}})
	if len(results) != 1 || !results[0].Matched {
		t.Fatalf("连续 3 天高湿应命中: %+v", results)
	}
}

func TestStaleTelemetryIsReportedMissing(t *testing.T) {
	now := time.Date(2026, 8, 14, 12, 0, 0, 0, time.UTC)
	results := EvaluateRules(RuleContext{Now: now, Samples: []TelemetrySample{{
		Metric: "humidity", Value: 90, Timestamp: now.Add(-24 * time.Hour),
	}}}, []RuleVersion{{
		Version: "env-v2", Name: "continuous_humidity", Disease: "白僵病", MaxStaleness: 2 * time.Hour,
	}})
	if len(results) != 1 || results[0].Matched {
		t.Fatalf("过期数据不应命中: %+v", results)
	}
	found := false
	for _, key := range results[0].Missing {
		if key == "humidity_stale" {
			found = true
		}
	}
	if !found {
		t.Fatalf("应标记 humidity_stale: %+v", results[0].Missing)
	}
}

func TestRuleResultKeepsInputAndVersion(t *testing.T) {
	now := time.Now()
	results := EvaluateRules(RuleContext{Now: now}, []RuleVersion{{
		Version: "env-v1", Name: "missing_rule", Disease: "测试", RequiresBiosecurity: true,
	}})
	if results[0].RuleVersion != "env-v1" || results[0].ComputedAt.IsZero() {
		t.Fatalf("规则结果缺少版本/计算时间: %+v", results[0])
	}
	var snapshot map[string]any
	if err := json.Unmarshal(results[0].InputSnapshot, &snapshot); err != nil {
		t.Fatalf("inputSnapshot 非法: %v", err)
	}
	if len(results[0].Missing) == 0 {
		t.Fatal("缺失输入应进入 missing")
	}
}