package test

import (
	"math/big"
	"testing"

	"github.com/hermeznetwork/hermez-node/common"
	"github.com/stretchr/testify/assert"
)

func TestGenerateBlocks(t *testing.T) {
	set := `
		Deposit(1) A: 10
		Deposit(2) A: 20
		Deposit(1) B: 5
		CreateAccountDeposit(1) C: 5
		CreateAccountDepositTransfer(1) D-A: 15, 10 (3)

		Transfer(1) A-B: 6 (1)
		Transfer(1) B-D: 3 (1)
		Transfer(1) A-D: 1 (1)

		// set new batch
		> batch

		DepositTransfer(1) A-B: 15, 10 (1)
		Transfer(1) C-A : 3 (1)
		Transfer(2) A-B: 15 (1)

		Deposit(1) User0: 20
		Deposit(3) User1: 20
		Transfer(1) User0-User1: 15 (1)
		Transfer(3) User1-User0: 15 (1)
		Transfer(1) A-C: 1 (1)

		> batch

		Transfer(1) User1-User0: 1 (1)

		> block

		// Exits
		Transfer(1) A-B: 1 (1)
		Exit(1) A: 5
	`
	tc := NewTestContext(t)
	blocks := tc.GenerateBlocks(set)
	assert.Equal(t, 2, len(blocks))
	assert.Equal(t, 3, len(blocks[0].Batches))
	assert.Equal(t, 1, len(blocks[1].Batches))
	assert.Equal(t, 5, len(blocks[0].Batches[0].L1UserTxs))
	assert.Equal(t, 0, len(blocks[1].Batches[0].L1UserTxs))

	// Check expected values generated by each line
	// #0: Deposit(1) A: 10
	tc.checkL1TxParams(t, blocks[0].Batches[0].L1UserTxs[0], common.TxTypeDeposit, "A1", "", big.NewInt(10), nil)
	// #1: Deposit(2) A: 20
	tc.checkL1TxParams(t, blocks[0].Batches[0].L1UserTxs[1], common.TxTypeDeposit, "A2", "", big.NewInt(20), nil)
	// #2: Deposit(1) A: 20
	tc.checkL1TxParams(t, blocks[0].Batches[0].L1UserTxs[2], common.TxTypeDeposit, "B1", "", big.NewInt(5), nil)
	// #3: CreateAccountDeposit(1) C: 5
	tc.checkL1TxParams(t, blocks[0].Batches[0].L1UserTxs[3], common.TxTypeCreateAccountDeposit, "C1", "", big.NewInt(5), nil)
	// #4: CreateAccountDepositTransfer(1) D-A: 15, 10 (3)
	tc.checkL1TxParams(t, blocks[0].Batches[0].L1UserTxs[4], common.TxTypeCreateAccountDepositTransfer, "D1", "A1", big.NewInt(15), big.NewInt(10))
	// #5: Transfer(1) A-B: 6 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[0].L2Txs[0], common.TxTypeTransfer, "A1", "B1", big.NewInt(6), common.BatchNum(0), common.Nonce(1))
	// #6: Transfer(1) B-D: 3 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[0].L2Txs[1], common.TxTypeTransfer, "B1", "D1", big.NewInt(3), common.BatchNum(0), common.Nonce(1))
	// #7: Transfer(1) A-D: 1 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[0].L2Txs[2], common.TxTypeTransfer, "A1", "D1", big.NewInt(1), common.BatchNum(0), common.Nonce(2))
	// change of Batch
	// #8: DepositTransfer(1) A-B: 15, 10 (1)
	tc.checkL1TxParams(t, blocks[0].Batches[1].L1UserTxs[0], common.TxTypeDepositTransfer, "A1", "B1", big.NewInt(15), big.NewInt(10))
	// #9: Deposit(1) User0: 20
	tc.checkL1TxParams(t, blocks[0].Batches[1].L1UserTxs[0], common.TxTypeDepositTransfer, "A1", "B1", big.NewInt(15), big.NewInt(10))
	// #10: Transfer(1) C-A : 3 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[1].L2Txs[0], common.TxTypeTransfer, "C1", "A1", big.NewInt(3), common.BatchNum(1), common.Nonce(1))
	// #11: Transfer(2) A-B: 15 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[1].L2Txs[1], common.TxTypeTransfer, "A2", "B2", big.NewInt(15), common.BatchNum(1), common.Nonce(1))
	// #12: Deposit(1) User0: 20
	tc.checkL1TxParams(t, blocks[0].Batches[1].L1UserTxs[1], common.TxTypeDeposit, "User01", "", big.NewInt(20), nil)
	// #13: Deposit(3) User1: 20
	tc.checkL1TxParams(t, blocks[0].Batches[1].L1UserTxs[2], common.TxTypeDeposit, "User13", "", big.NewInt(20), nil)
	// #14: Transfer(1) User0-User1: 15 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[1].L2Txs[2], common.TxTypeTransfer, "User01", "User11", big.NewInt(15), common.BatchNum(1), common.Nonce(1))
	// #15: Transfer(3) User1-User0: 15 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[1].L2Txs[3], common.TxTypeTransfer, "User13", "User03", big.NewInt(15), common.BatchNum(1), common.Nonce(1))
	// #16: Transfer(1) A-C: 1 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[1].L2Txs[4], common.TxTypeTransfer, "A1", "C1", big.NewInt(1), common.BatchNum(1), common.Nonce(3))
	// change of Batch
	// #17: Transfer(1) User1-User0: 1 (1)
	tc.checkL2TxParams(t, blocks[0].Batches[2].L2Txs[0], common.TxTypeTransfer, "User11", "User01", big.NewInt(1), common.BatchNum(2), common.Nonce(1))
	// change of Block (implies also a change of batch)
	// #18: Transfer(1) A-B: 1 (1)
	tc.checkL2TxParams(t, blocks[1].Batches[0].L2Txs[0], common.TxTypeTransfer, "A1", "B1", big.NewInt(1), common.BatchNum(3), common.Nonce(4))
}

func (tc *TestContext) checkL1TxParams(t *testing.T, tx common.L1Tx, typ common.TxType, from, to string, loadAmount, amount *big.Int) {
	assert.Equal(t, typ, tx.Type)
	if tx.FromIdx != nil {
		assert.Equal(t, tc.accounts[from].Idx, *tx.FromIdx)
	}
	assert.Equal(t, tc.accounts[from].Addr.Hex(), tx.FromEthAddr.Hex())
	assert.Equal(t, tc.accounts[from].BJJ.Public(), tx.FromBJJ)
	if tx.ToIdx != common.Idx(0) {
		assert.Equal(t, tc.accounts[to].Idx, tx.ToIdx)
	}
	if loadAmount != nil {
		assert.Equal(t, loadAmount, tx.LoadAmount)
	}
	if amount != nil {
		assert.Equal(t, amount, tx.Amount)
	}
}
func (tc *TestContext) checkL2TxParams(t *testing.T, tx common.L2Tx, typ common.TxType, from, to string, amount *big.Int, batchNum common.BatchNum, nonce common.Nonce) {
	assert.Equal(t, typ, tx.Type)
	assert.Equal(t, tc.accounts[from].Idx, tx.FromIdx)
	if tx.Type != common.TxTypeExit {
		assert.Equal(t, tc.accounts[to].Idx, tx.ToIdx)
	}
	if amount != nil {
		assert.Equal(t, amount, tx.Amount)
	}
	assert.Equal(t, batchNum, tx.BatchNum)
	assert.Equal(t, nonce, tx.Nonce)
}

func TestGeneratePoolL2Txs(t *testing.T) {
	set := `
		PoolTransfer(1) A-B: 6 (1)
		PoolTransfer(1) B-C: 3 (1)
		PoolTransfer(1) C-A: 3 (1)
		PoolTransfer(1) A-B: 1 (1)
		PoolTransfer(2) A-B: 15 (1)
		PoolTransfer(1) User0-User1: 15 (1)
		PoolTransfer(3) User1-User0: 15 (1)
		PoolTransfer(2) B-D: 3 (1)
		PoolExit(1) A: 3
	`
	tc := NewTestContext(t)
	poolL2Txs := tc.GeneratePoolL2Txs(set)
	assert.Equal(t, 9, len(poolL2Txs))
	assert.Equal(t, common.TxTypeTransfer, poolL2Txs[0].Type)
	assert.Equal(t, common.TxTypeExit, poolL2Txs[8].Type)
	assert.Equal(t, tc.accounts["B1"].Addr.Hex(), poolL2Txs[0].ToEthAddr.Hex())
	assert.Equal(t, tc.accounts["B1"].BJJ.Public().String(), poolL2Txs[0].ToBJJ.String())
	assert.Equal(t, tc.accounts["User11"].Addr.Hex(), poolL2Txs[5].ToEthAddr.Hex())
	assert.Equal(t, tc.accounts["User11"].BJJ.Public().String(), poolL2Txs[5].ToBJJ.String())

	assert.Equal(t, common.Nonce(1), poolL2Txs[0].Nonce)
	assert.Equal(t, common.Nonce(2), poolL2Txs[3].Nonce)
	assert.Equal(t, common.Nonce(3), poolL2Txs[8].Nonce)

	// load another set in the same TestContext
	set = `
		PoolTransfer(1) A-B: 6 (1)
		PoolTransfer(1) B-C: 3 (1)
		PoolTransfer(1) A-C: 3 (1)
	`
	poolL2Txs = tc.GeneratePoolL2Txs(set)
	assert.Equal(t, common.Nonce(4), poolL2Txs[0].Nonce)
	assert.Equal(t, common.Nonce(2), poolL2Txs[1].Nonce)
	assert.Equal(t, common.Nonce(5), poolL2Txs[2].Nonce)
}