package infer

import (
	"testing"

	"tianyan-edge/internal/config"
)

func TestIsDuplicate(t *testing.T) {
	cfg := &config.Config{DedupWindowSec: 30}
	c := &Client{
		cfg:   cfg,
		dedup: &dedupState{seen: make(map[string]float64)},
	}

	// First detection should NOT be duplicate (uses default config dedup window of 30s)
	// ts=100.0, key="cam-001|person" — first time, not duplicate
	if c.isDuplicate("cam-001", "person", 100.0) {
		t.Error("first detection should not be duplicate")
	}

	// Same device+class within window should BE duplicate
	// ts=105.0, 105-100=5 < 30, duplicate
	if !c.isDuplicate("cam-001", "person", 105.0) {
		t.Error("same event within window should be duplicate")
	}

	// Same device+class outside window should NOT be duplicate
	// ts=200.0, 200-105=95 > 30, not duplicate (updates the timestamp)
	if c.isDuplicate("cam-001", "person", 200.0) {
		t.Error("same event outside window should not be duplicate")
	}

	// Different class should NOT be duplicate
	if c.isDuplicate("cam-001", "car", 105.0) {
		t.Error("different class should not be duplicate")
	}

	// Different device should NOT be duplicate
	if c.isDuplicate("cam-002", "person", 105.0) {
		t.Error("different device should not be duplicate")
	}
}

func TestDedupMapCleanup(t *testing.T) {
	cfg := &config.Config{DedupWindowSec: 30}
	c := &Client{
		cfg:   cfg,
		dedup: &dedupState{seen: make(map[string]float64)},
	}

	// Fill up the map with old entries
	for i := 0; i < 5001; i++ {
		c.dedup.seen["cam-001|person"] = float64(i * 10)
	}
	// Trigger cleanup by adding a new entry
	c.isDuplicate("cam-001", "person", 99999.0)

	if len(c.dedup.seen) > 5000 {
		t.Errorf("dedup map should be cleaned up, got %d entries", len(c.dedup.seen))
	}
}

func TestMustUUID(t *testing.T) {
	u1 := mustUUID()
	u2 := mustUUID()
	if u1 == u2 {
		t.Error("UUIDs should be unique")
	}
	// Check format: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx (32 hex chars with dashes)
	parts := 0
	for _, c := range u1 {
		if c == '-' {
			parts++
		}
	}
	if parts != 4 {
		t.Errorf("UUID format: expected 4 dashes, got %d", parts)
	}
}