package pump_parser

import (
	"encoding/json"
	"os"
	"path/filepath"
	"sort"
	"strings"
	"testing"

	"github.com/gagliardetto/solana-go/rpc"
)

func TestTxBinaryRealFixtureSizes(t *testing.T) {
	fixtures, err := filepath.Glob(filepath.Join("testdata", "rpc", "*.json"))
	if err != nil {
		t.Fatalf("glob fixtures: %v", err)
	}
	if len(fixtures) == 0 {
		t.Fatal("no rpc fixtures found")
	}
	sort.Strings(fixtures)

	type sizeResult struct {
		name          string
		swaps         int
		platforms     int
		mevAgents     int
		addresses     int
		encodedBytes  int
		fixtureBytes  int
		txBinaryBytes int
	}

	results := make([]sizeResult, 0, len(fixtures))
	totalEncoded := 0

	for _, fixture := range fixtures {
		tx, rawTxBytesLen, fixtureBytesLen := mustParseRPCFixtureTxForBinarySize(t, fixture)
		binaryTx, err := NewTxBinary(tx)
		if err != nil {
			t.Fatalf("build tx binary fixture %s: %v", fixture, err)
		}
		encoded, err := binaryTx.MarshalBinary()
		if err != nil {
			t.Fatalf("encode fixture %s: %v", fixture, err)
		}

		result := sizeResult{
			name:          strings.TrimSuffix(filepath.Base(fixture), filepath.Ext(fixture)),
			swaps:         len(tx.Swaps),
			platforms:     len(tx.Platform),
			mevAgents:     len(tx.MevAgent),
			addresses:     len(binaryTx.AddressTable),
			encodedBytes:  len(encoded),
			fixtureBytes:  fixtureBytesLen,
			txBinaryBytes: rawTxBytesLen,
		}
		results = append(results, result)
		totalEncoded += result.encodedBytes
	}

	for _, result := range results {
		t.Logf(
			"%s encoded=%dB swaps=%d platforms=%d mev=%d addresses=%d fixture_json=%dB raw_tx=%dB",
			result.name,
			result.encodedBytes,
			result.swaps,
			result.platforms,
			result.mevAgents,
			result.addresses,
			result.fixtureBytes,
			result.txBinaryBytes,
		)
	}

	minResult := results[0]
	maxResult := results[0]
	for _, result := range results[1:] {
		if result.encodedBytes < minResult.encodedBytes {
			minResult = result
		}
		if result.encodedBytes > maxResult.encodedBytes {
			maxResult = result
		}
	}

	t.Logf(
		"summary fixtures=%d avg=%dB min=%dB(%s) max=%dB(%s)",
		len(results),
		totalEncoded/len(results),
		minResult.encodedBytes,
		minResult.name,
		maxResult.encodedBytes,
		maxResult.name,
	)
}

func mustParseRPCFixtureTxForBinarySize(t *testing.T, fixturePath string) (*Tx, int, int) {
	t.Helper()

	raw, err := os.ReadFile(fixturePath)
	if err != nil {
		t.Fatalf("read fixture %s: %v", fixturePath, err)
	}

	var response struct {
		Result *rpc.GetTransactionResult `json:"result"`
	}
	if err := json.Unmarshal(raw, &response); err != nil {
		t.Fatalf("unmarshal fixture %s: %v", fixturePath, err)
	}
	if response.Result == nil || response.Result.Transaction == nil || response.Result.Meta == nil {
		t.Fatalf("fixture %s is missing transaction data", fixturePath)
	}

	rawBinary := response.Result.Transaction.GetBinary()
	if len(rawBinary) == 0 {
		t.Fatalf("fixture %s has empty transaction bytes", fixturePath)
	}

	txWithMeta := rpc.TransactionWithMeta{
		Slot:        response.Result.Slot,
		BlockTime:   response.Result.BlockTime,
		Transaction: rpc.DataBytesOrJSONFromBytes(rawBinary),
		Meta:        response.Result.Meta,
		Version:     response.Result.Version,
	}

	var blockTime *uint64
	if response.Result.BlockTime != nil {
		bt := uint64(*response.Result.BlockTime)
		blockTime = &bt
	}

	rawTx, err := FromRpcTransactionWithMeta(txWithMeta, blockTime, response.Result.Slot, 0)
	if err != nil {
		t.Fatalf("convert fixture %s: %v", fixturePath, err)
	}

	tx, err := ParseRawTx(rawTx)
	if err != nil {
		t.Fatalf("parse fixture %s: %v", fixturePath, err)
	}
	return tx, len(rawBinary), len(raw)
}