package squawk

import (
	"testing"
)

func TestNewDatabase(t *testing.T) {
	db := NewDatabase()
	if db == nil {
		t.Fatal("NewDatabase() returned nil")
	}
	
	if len(db.codes) == 0 {
		t.Error("Database should contain pre-loaded codes")
	}
}

func TestEmergencyCodes(t *testing.T) {
	db := NewDatabase()
	
	emergencyCodes := []string{"7500", "7600", "7700"}
	
	for _, code := range emergencyCodes {
		info := db.Lookup(code)
		if info == nil {
			t.Errorf("Emergency code %s not found", code)
			continue
		}
		
		if info.Type != Emergency {
			t.Errorf("Code %s should be Emergency type, got %s", code, info.Type)
		}
		
		if !db.IsEmergencyCode(code) {
			t.Errorf("IsEmergencyCode(%s) should return true", code)
		}
	}
}

func TestStandardCodes(t *testing.T) {
	db := NewDatabase()
	
	testCases := []struct {
		code        string
		description string
	}{
		{"1200", "VFR - Visual Flight Rules"},
		{"7000", "VFR - Visual Flight Rules"},
		{"1000", "Mode A/C Not Assigned"},
	}
	
	for _, tc := range testCases {
		info := db.Lookup(tc.code)
		if info == nil {
			t.Errorf("Standard code %s not found", tc.code)
			continue
		}
		
		if info.Description != tc.description {
			t.Errorf("Code %s: expected description %q, got %q", 
				tc.code, tc.description, info.Description)
		}
	}
}

func TestLookupInt(t *testing.T) {
	db := NewDatabase()
	
	// Test integer lookup
	info := db.LookupInt(7700)
	if info == nil {
		t.Fatal("LookupInt(7700) returned nil")
	}
	
	if info.Code != "7700" {
		t.Errorf("Expected code '7700', got '%s'", info.Code)
	}
	
	if info.Type != Emergency {
		t.Errorf("Code 7700 should be Emergency type, got %s", info.Type)
	}
}

func TestLookupHex(t *testing.T) {
	db := NewDatabase()
	
	// 7700 in octal is 3840 in decimal, which is F00 in hex
	// However, squawk codes are transmitted differently in different formats
	// For now, test with a simple hex conversion
	
	// Test invalid hex
	info := db.LookupHex("INVALID")
	if info != nil {
		t.Error("LookupHex with invalid hex should return nil")
	}
}

func TestFormatSquawkWithDescription(t *testing.T) {
	db := NewDatabase()
	
	testCases := []struct {
		code     string
		expected string
	}{
		{"7700", "7700 (⚠️ EMERGENCY - General Emergency)"},
		{"1200", "1200 (VFR - Visual Flight Rules)"},
		{"1277", "1277 (🔸 Search and Rescue)"},
		{"0000", "0000 (🔰 No Transponder/Military)"},
		{"9999", "9999"}, // Unknown code should return just the code
	}
	
	for _, tc := range testCases {
		result := db.FormatSquawkWithDescription(tc.code)
		if result != tc.expected {
			t.Errorf("FormatSquawkWithDescription(%s): expected %q, got %q",
				tc.code, tc.expected, result)
		}
	}
}

func TestGetEmergencyCodes(t *testing.T) {
	db := NewDatabase()
	
	emergencyCodes := db.GetEmergencyCodes()
	if len(emergencyCodes) != 3 {
		t.Errorf("Expected 3 emergency codes, got %d", len(emergencyCodes))
	}
	
	// Check that they're sorted by priority (highest first)
	for i := 1; i < len(emergencyCodes); i++ {
		if emergencyCodes[i-1].Priority < emergencyCodes[i].Priority {
			t.Error("Emergency codes should be sorted by priority (highest first)")
		}
	}
}

func TestAddCustomCode(t *testing.T) {
	db := NewDatabase()
	
	customCode := &CodeInfo{
		Code:        "1234",
		Description: "Test Custom Code",
		Type:        Special,
		Region:      "Test",
		Priority:    50,
		Notes:       "This is a test custom code",
	}
	
	db.AddCustomCode(customCode)
	
	info := db.Lookup("1234")
	if info == nil {
		t.Fatal("Custom code not found after adding")
	}
	
	if info.Description != "Test Custom Code" {
		t.Errorf("Custom code description mismatch: expected %q, got %q",
			"Test Custom Code", info.Description)
	}
}

func TestCodeTypeString(t *testing.T) {
	testCases := []struct {
		codeType CodeType
		expected string
	}{
		{Unknown, "Unknown"},
		{Emergency, "Emergency"},
		{Standard, "Standard"},
		{Military, "Military"},
		{Special, "Special"},
	}
	
	for _, tc := range testCases {
		result := tc.codeType.String()
		if result != tc.expected {
			t.Errorf("CodeType.String(): expected %q, got %q", tc.expected, result)
		}
	}
}

func TestGetAllCodes(t *testing.T) {
	db := NewDatabase()
	
	allCodes := db.GetAllCodes()
	if len(allCodes) == 0 {
		t.Error("GetAllCodes() should return non-empty slice")
	}
	
	// Verify we can find known codes in the result
	found7700 := false
	found1200 := false
	
	for _, code := range allCodes {
		if code.Code == "7700" {
			found7700 = true
		}
		if code.Code == "1200" {
			found1200 = true
		}
	}
	
	if !found7700 {
		t.Error("Emergency code 7700 not found in GetAllCodes() result")
	}
	if !found1200 {
		t.Error("Standard code 1200 not found in GetAllCodes() result")
	}
}