package processor_test

import (
	"testing"

	"github.com/jwetzell/showbridge-go/internal/config"
	"github.com/jwetzell/showbridge-go/internal/processor"
)

func TestUintParseFromRegistry(t *testing.T) {
	registration, ok := processor.ProcessorRegistry["uint.parse"]
	if !ok {
		t.Fatalf("uint.parse processor not registered")
	}

	processorInstance, err := registration.New(config.ProcessorConfig{
		Type: "uint.parse",
	})

	if err != nil {
		t.Fatalf("failed to create uint.parse processor: %s", err)
	}

	if processorInstance.Type() != "uint.parse" {
		t.Fatalf("uint.parse processor has wrong type: %s", processorInstance.Type())
	}
}

func TestGoodUintParse(t *testing.T) {

	tests := []struct {
		name     string
		params   map[string]any
		payload  any
		expected uint64
	}{
		{
			name:     "positive number",
			params:   map[string]any{"base": 10, "bitSize": 64},
			payload:  "12345",
			expected: 12345,
		},
		{
			name:     "zero",
			params:   map[string]any{"base": 10, "bitSize": 64},
			payload:  "0",
			expected: 0,
		},
		{
			name:     "binary",
			params:   map[string]any{"base": 2, "bitSize": 64},
			payload:  "1010101",
			expected: 85,
		},
		{
			name:     "hex",
			params:   map[string]any{"base": 16, "bitSize": 64},
			payload:  "15F",
			expected: 351,
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			registration, ok := processor.ProcessorRegistry["uint.parse"]
			if !ok {
				t.Fatalf("uint.parse processor not registered")
			}

			processorInstance, err := registration.New(config.ProcessorConfig{
				Type:   "uint.parse",
				Params: test.params,
			})

			if err != nil {
				t.Fatalf("uint.parse failed to create processor: %s", err)
			}

			got, err := processorInstance.Process(t.Context(), test.payload)
			if err != nil {
				t.Fatalf("uint.parse processing failed: %s", err)
			}

			gotUint, ok := got.(uint64)
			if !ok {
				t.Fatalf("uint.parse returned a %T payload: %s", got, got)
			}

			if gotUint != test.expected {
				t.Fatalf("uint.parse got %d, expected %d", gotUint, test.expected)
			}
		})
	}
}

func TestBadUintParse(t *testing.T) {
	tests := []struct {
		name        string
		params      map[string]any
		payload     any
		errorString string
	}{
		{
			name: "non-string base",
			params: map[string]any{
				"base":    "10",
				"bitSize": 64,
			},
			payload:     "12345",
			errorString: "uint.parse base error: not a number",
		},
		{
			name: "non-string bitSize",
			params: map[string]any{
				"base":    10,
				"bitSize": "64",
			},
			payload:     "12345",
			errorString: "uint.parse bitSize error: not a number",
		},
		{
			name:        "non-string input",
			params:      map[string]any{"base": 10, "bitSize": 64},
			payload:     []byte{0x01},
			errorString: "uint.parse processor only accepts a string",
		},
		{
			name:        "not uint string",
			params:      map[string]any{"base": 10, "bitSize": 64},
			payload:     "-1234",
			errorString: "strconv.ParseUint: parsing \"-1234\": invalid syntax",
		},
		{
			name:        "bit overflow",
			params:      map[string]any{"base": 10, "bitSize": 32},
			payload:     "123456789012345678901234567",
			errorString: "strconv.ParseUint: parsing \"123456789012345678901234567\": value out of range",
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			registration, ok := processor.ProcessorRegistry["uint.parse"]
			if !ok {
				t.Fatalf("uint.parse processor not registered")
			}

			processorInstance, err := registration.New(config.ProcessorConfig{
				Type:   "uint.parse",
				Params: test.params,
			})

			if err != nil {
				if err.Error() != test.errorString {
					t.Fatalf("uint.parse got error '%s', expected '%s'", err.Error(), test.errorString)
				}
				return
			}

			got, err := processorInstance.Process(t.Context(), test.payload)

			if err == nil {
				t.Fatalf("uint.parse expected to fail but succeeded, got: %v", got)

			}
			if err.Error() != test.errorString {
				t.Fatalf("uint.parse got error '%s', expected '%s'", err.Error(), test.errorString)
			}
		})
	}
}