package generate

import (
	"io/ioutil"
	"testing"
	"time"

	"github.com/fiskerinc/cloud-services/pkg/can-go/pkg/descriptor"
	examplecan "github.com/fiskerinc/cloud-services/pkg/can-go/testdata/gen/go/example"
	"gotest.tools/v3/assert"
)

func TestCompile_ExampleDBC(t *testing.T) {
	finish := runTestInDir(t, "../..")
	defer finish()
	const exampleDBCFile = "testdata/dbc/example/example.dbc"
	exampleDatabase := &descriptor.Database{
		SourceFile: exampleDBCFile,
		Version:    "",
		Nodes: []*descriptor.Node{
			{
				Name: "DBG",
			},
			{
				Name:        "DRIVER",
				Description: "The driver controller driving the car",
			},
			{
				Name: "IO",
			},
			{
				Name:        "MOTOR",
				Description: "The motor controller of the car",
			},
			{
				Name:        "SENSOR",
				Description: "The sensor controller of the car",
			},
		},
	}

	exampleDatabase.Messages[1] = &descriptor.Message{
		ID:         1,
		Name:       "EmptyMessage",
		SenderNode: "DBG",
	}

	exampleDatabase.Messages[100] = &descriptor.Message{
		ID:          100,
		Name:        "DriverHeartbeat",
		Length:      1,
		SenderNode:  "DRIVER",
		Description: "Sync message used to synchronize the controllers",
		SendType:    descriptor.SendTypeCyclic,
		CycleTime:   time.Second,
		Signals: []*descriptor.Signal{
			{
				Name:          "Command",
				Start:         0,
				Length:        8,
				Scale:         1,
				ReceiverNodes: []string{"SENSOR", "MOTOR"},
				ValueDescriptions: []*descriptor.ValueDescription{
					{Value: 0, Description: "None"},
					{Value: 1, Description: "Sync"},
					{Value: 2, Description: "Reboot"},
				},
			},
		},
	}

	exampleDatabase.Messages[101] = &descriptor.Message{
		ID:         101,
		Name:       "MotorCommand",
		Length:     1,
		SenderNode: "DRIVER",
		SendType:   descriptor.SendTypeCyclic,
		CycleTime:  100 * time.Millisecond,
		Signals: []*descriptor.Signal{
			{
				Name:          "Steer",
				Start:         0,
				Length:        4,
				IsSigned:      true,
				Scale:         1,
				Offset:        -5,
				Min:           -5,
				Max:           5,
				ReceiverNodes: []string{"MOTOR"},
			},
			{
				Name:          "Drive",
				Start:         4,
				Length:        4,
				Scale:         1,
				Max:           9,
				ReceiverNodes: []string{"MOTOR"},
			},
		},
	}

	exampleDatabase.Messages[200] = &descriptor.Message{
		ID:         200,
		Name:       "SensorSonars",
		Length:     8,
		SenderNode: "SENSOR",
		SendType:   descriptor.SendTypeCyclic,
		CycleTime:  100 * time.Millisecond,
		Signals: []*descriptor.Signal{
			{
				Name:          "Mux",
				IsMultiplexer: true,
				Start:         0,
				Length:        4,
				Scale:         1,
				ReceiverNodes: []string{"DRIVER", "IO"},
			},
			{
				Name:          "ErrCount",
				Start:         4,
				Length:        12,
				Scale:         1,
				ReceiverNodes: []string{"DRIVER", "IO"},
			},
			{
				Name:             "Left",
				IsMultiplexed:    true,
				MultiplexerValue: 0,
				Start:            16,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DRIVER", "IO"},
			},
			{
				Name:             "NoFiltLeft",
				IsMultiplexed:    true,
				MultiplexerValue: 1,
				Start:            16,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DBG"},
			},
			{
				Name:             "Middle",
				IsMultiplexed:    true,
				MultiplexerValue: 0,
				Start:            28,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DRIVER", "IO"},
			},
			{
				Name:             "NoFiltMiddle",
				IsMultiplexed:    true,
				MultiplexerValue: 1,
				Start:            28,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DBG"},
			},
			{
				Name:             "Right",
				IsMultiplexed:    true,
				MultiplexerValue: 0,
				Start:            40,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DRIVER", "IO"},
			},
			{
				Name:             "NoFiltRight",
				IsMultiplexed:    true,
				MultiplexerValue: 1,
				Start:            40,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DBG"},
			},
			{
				Name:             "Rear",
				IsMultiplexed:    true,
				MultiplexerValue: 0,
				Start:            52,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DRIVER", "IO"},
			},
			{
				Name:             "NoFiltRear",
				IsMultiplexed:    true,
				MultiplexerValue: 1,
				Start:            52,
				Length:           12,
				Scale:            0.1,
				ReceiverNodes:    []string{"DBG"},
			},
		},
	}

	exampleDatabase.Messages[400] = &descriptor.Message{
		ID:         400,
		Name:       "MotorStatus",
		Length:     3,
		SenderNode: "MOTOR",
		SendType:   descriptor.SendTypeCyclic,
		CycleTime:  100 * time.Millisecond,
		Signals: []*descriptor.Signal{
			{
				Name:          "WheelError",
				Start:         0,
				Length:        1,
				Scale:         1,
				ReceiverNodes: []string{"DRIVER", "IO"},
			},
			{
				Name:          "SpeedKph",
				Start:         8,
				Length:        16,
				Scale:         0.001,
				Unit:          "km/h",
				ReceiverNodes: []string{"DRIVER", "IO"},
			},
		},
	}

	exampleDatabase.Messages[500] = &descriptor.Message{
		ID:         500,
		Name:       "IODebug",
		Length:     6,
		SenderNode: "IO",
		SendType:   descriptor.SendTypeEvent,
		Signals: []*descriptor.Signal{
			{
				Name:          "TestUnsigned",
				Start:         0,
				Length:        8,
				Scale:         1,
				ReceiverNodes: []string{"DBG"},
			},
			{
				Name:          "TestEnum",
				Start:         8,
				Length:        6,
				Scale:         1,
				ReceiverNodes: []string{"DBG"},
				DefaultValue:  int(examplecan.IODebug_TestEnum_Two),
				ValueDescriptions: []*descriptor.ValueDescription{
					{Value: 1, Description: "One"},
					{Value: 2, Description: "Two"},
				},
			},
			{
				Name:          "TestSigned",
				Start:         16,
				Length:        8,
				IsSigned:      true,
				Scale:         1,
				ReceiverNodes: []string{"DBG"},
			},
			{
				Name:          "TestFloat",
				Start:         24,
				Length:        8,
				Scale:         0.5,
				ReceiverNodes: []string{"DBG"},
			},
			{
				Name:          "TestBoolEnum",
				Start:         32,
				Length:        1,
				Scale:         1,
				ReceiverNodes: []string{"DBG"},
				ValueDescriptions: []*descriptor.ValueDescription{
					{Value: 0, Description: "Zero"},
					{Value: 1, Description: "One"},
				},
			},
			{
				Name:          "TestScaledEnum",
				Start:         40,
				Length:        2,
				Scale:         2,
				Min:           0,
				Max:           6,
				ReceiverNodes: []string{"DBG"},
				ValueDescriptions: []*descriptor.ValueDescription{
					{Value: 0, Description: "Zero"},
					{Value: 1, Description: "Two"},
					{Value: 2, Description: "Four"},
					{Value: 3, Description: "Six"},
				},
			},
		},
	}

	input, err := ioutil.ReadFile(exampleDBCFile)
	assert.NilError(t, err)
	result, err := Compile(exampleDBCFile, input)
	if err != nil {
		t.Fatal(err)
	}
	if len(result.Warnings) > 0 {
		t.Fatal(result.Warnings)
	}
	assert.DeepEqual(t, exampleDatabase, result.Database)
}