package model

import (
	"encoding/json"
	"testing"

	"github.com/AFASystems/presence/internal/pkg/model"
)

func TestBeaconEvent_Hash(t *testing.T) {
	e := model.BeaconEvent{
		ID:      "beacon-1",
		Name:    "beacon-1",
		Type:    "iBeacon",
		Battery: 85,
		Event:   1,
	}
	hash := e.Hash()
	if len(hash) == 0 {
		t.Error("Expected non-empty hash")
	}

	// Same event should produce same hash
	hash2 := e.Hash()
	if string(hash) != string(hash2) {
		t.Error("Hash should be deterministic")
	}
}

func TestBeaconEvent_Hash_BatteryRounded(t *testing.T) {
	e1 := model.BeaconEvent{ID: "1", Battery: 84, Event: 1}
	e2 := model.BeaconEvent{ID: "1", Battery: 89, Event: 1}
	hash1 := e1.Hash()
	hash2 := e2.Hash()
	// Battery is rounded to nearest 10, so 84 and 89 should produce same hash
	if string(hash1) != string(hash2) {
		t.Error("Battery rounding should make 84 and 89 produce same hash")
	}
}

func TestBeaconEvent_ToJSON(t *testing.T) {
	e := model.BeaconEvent{
		ID:      "beacon-1",
		Name:    "Test",
		Type:    "iBeacon",
		Battery: 100,
	}
	data, err := e.ToJSON()
	if err != nil {
		t.Fatalf("ToJSON failed: %v", err)
	}
	var decoded model.BeaconEvent
	if err := json.Unmarshal(data, &decoded); err != nil {
		t.Fatalf("Failed to unmarshal: %v", err)
	}
	if decoded.ID != e.ID || decoded.Battery != e.Battery {
		t.Errorf("Decoded mismatch: got %+v", decoded)
	}
}

func TestParserRegistry_RegisterAndUnregister(t *testing.T) {
	registry := &model.ParserRegistry{ParserList: make(map[string]model.BeaconParser)}
	config := model.Config{
		Name:    "test-parser",
		Min:     4,
		Max:     20,
		Pattern: []string{"0x02", "0x01"},
		Configs: map[string]model.ParserConfig{
			"battery": {Length: 1, Offset: 2, Order: "littleendian"},
		},
	}

	registry.Register("test-parser", config)
	if len(registry.ParserList) != 1 {
		t.Errorf("Expected 1 parser, got %d", len(registry.ParserList))
	}

	registry.Unregister("test-parser")
	if len(registry.ParserList) != 0 {
		t.Errorf("Expected 0 parsers after Unregister, got %d", len(registry.ParserList))
	}
}

func TestParserRegistry_UpdateOverwrites(t *testing.T) {
	registry := &model.ParserRegistry{ParserList: make(map[string]model.BeaconParser)}
	config1 := model.Config{Name: "p1", Min: 2, Max: 10, Pattern: []string{"0x02"}}
	config2 := model.Config{Name: "p1", Min: 5, Max: 15, Pattern: []string{"0x03"}}

	registry.Register("p1", config1)
	registry.Register("p1", config2)

	if len(registry.ParserList) != 1 {
		t.Errorf("Expected 1 parser after update, got %d", len(registry.ParserList))
	}
}

func TestConfig_GetPatternBytes(t *testing.T) {
	config := model.Config{Pattern: []string{"0xFF", "0x4C", "0x00"}}
	bytes := config.GetPatternBytes()
	if len(bytes) != 3 {
		t.Fatalf("Expected 3 bytes, got %d", len(bytes))
	}
	if bytes[0] != 0xFF || bytes[1] != 0x4C || bytes[2] != 0x00 {
		t.Errorf("Expected [0xFF, 0x4C, 0x00], got %v", bytes)
	}
}