#include "data/Types.hpp"
#include "rpc/Errors.hpp"
#include "rpc/common/AnyHandler.hpp"
#include "rpc/common/Types.hpp"
#include "rpc/handlers/AccountChannels.hpp"
#include "util/HandlerBaseTestFixture.hpp"
#include "util/TestObject.hpp"

#include <boost/json/parse.hpp>
#include <boost/json/value_to.hpp>
#include <fmt/format.h>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <xrpl/basics/base_uint.h>
#include <xrpl/protocol/Indexes.h>
#include <xrpl/protocol/LedgerHeader.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/STObject.h>

#include <optional>
#include <string>
#include <vector>

using namespace rpc;
using namespace data;
namespace json = boost::json;
using namespace testing;

namespace {

constexpr auto kLedgerHash = "4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A652";
constexpr auto kAccount = "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn";
constexpr auto kAccount2 = "rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun";
constexpr auto kAccount3 = "rB9BMzh27F3Q6a5FtGPDayQoCCEdiRdqcK";
constexpr auto kIndex1 = "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC321";
constexpr auto kIndex2 = "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC322";
constexpr auto kTxnId = "05FB0EB4B899F056FA095537C5817163801F544BAFCEA39C995D76DB4D16F9DD";

}  // namespace

struct RPCAccountChannelsHandlerTest : HandlerBaseTest {
    RPCAccountChannelsHandlerTest()
    {
        backend_->setRange(10, 30);
    }
};

TEST_F(RPCAccountChannelsHandlerTest, LimitNotInt)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": "t"
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, LimitNegative)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": -1
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, LimitZero)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 0
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, NonHexLedgerHash)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 10,
                    "ledger_hash": "xxx"
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "ledger_hashMalformed");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, NonStringLedgerHash)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 10,
                    "ledger_hash": 123
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "ledger_hashNotString");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, InvalidLedgerIndexString)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 10,
                    "ledger_index": "notvalidated"
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerIndexMalformed");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, MarkerNotString)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "marker": 9
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "markerNotString");
    });
}

// error case : invalid marker
// marker format is composed of a comma separated index and start hint. The
// former will be read as hex, and the latter using boost lexical cast.
TEST_F(RPCAccountChannelsHandlerTest, InvalidMarker)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "marker": "123invalid"
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "Malformed cursor.");
    });
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "marker": 401
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
    });
}

// error case: account invalid format, length is incorrect
TEST_F(RPCAccountChannelsHandlerTest, AccountInvalidFormat)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(R"JSON({
            "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jp"
        })JSON");
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "actMalformed");
        EXPECT_EQ(err.at("error_message").as_string(), "accountMalformed");
    });
}

// error case: account invalid format
TEST_F(RPCAccountChannelsHandlerTest, AccountNotString)
{
    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(R"JSON({
            "account": 12
        })JSON");
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "invalidParams");
        EXPECT_EQ(err.at("error_message").as_string(), "accountNotString");
    });
}

// error case ledger non exist via hash
TEST_F(RPCAccountChannelsHandlerTest, NonExistLedgerViaLedgerHash)
{
    // mock fetchLedgerByHash return empty
    ON_CALL(*backend_, fetchLedgerByHash(ripple::uint256{kLedgerHash}, _))
        .WillByDefault(Return(std::optional<ripple::LedgerHeader>{}));
    EXPECT_CALL(*backend_, fetchLedgerByHash).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_hash": "{}"
            }})JSON",
            kAccount,
            kLedgerHash
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);

        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "lgrNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerNotFound");
    });
}

// error case ledger non exist via index
TEST_F(RPCAccountChannelsHandlerTest, NonExistLedgerViaLedgerStringIndex)
{
    // mock fetchLedgerBySequence return empty
    ON_CALL(*backend_, fetchLedgerBySequence)
        .WillByDefault(Return(std::optional<ripple::LedgerHeader>{}));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_index": "4"
            }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "lgrNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerNotFound");
    });
}

TEST_F(RPCAccountChannelsHandlerTest, NonExistLedgerViaLedgerIntIndex)
{
    // mock fetchLedgerBySequence return empty
    ON_CALL(*backend_, fetchLedgerBySequence)
        .WillByDefault(Return(std::optional<ripple::LedgerHeader>{}));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_index": 4
        }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "lgrNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerNotFound");
    });
}

// error case ledger > max seq via hash
// idk why this case will happen in reality
TEST_F(RPCAccountChannelsHandlerTest, NonExistLedgerViaLedgerHash2)
{
    // mock fetchLedgerByHash return ledger but seq is 31 > 30
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 31);
    ON_CALL(*backend_, fetchLedgerByHash(ripple::uint256{kLedgerHash}, _))
        .WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerByHash).Times(1);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_hash": "{}"
            }})JSON",
            kAccount,
            kLedgerHash
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "lgrNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerNotFound");
    });
}

// error case ledger > max seq via index
TEST_F(RPCAccountChannelsHandlerTest, NonExistLedgerViaLedgerIndex2)
{
    // no need to check from db,call fetchLedgerBySequence 0 time
    // differ from previous logic
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(0);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_index": "31"
            }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "lgrNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "ledgerNotFound");
    });
}

// error case account not exist
TEST_F(RPCAccountChannelsHandlerTest, NonExistAccount)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerByHash(ripple::uint256{kLedgerHash}, _))
        .WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerByHash).Times(1);
    // fetch account object return empty
    ON_CALL(*backend_, doFetchLedgerObject).WillByDefault(Return(std::optional<Blob>{}));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(1);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "ledger_hash": "{}"
            }})JSON",
            kAccount,
            kLedgerHash
        )
    );
    runSpawn([&, this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_FALSE(output);
        auto const err = rpc::makeError(output.result.error());
        EXPECT_EQ(err.at("error").as_string(), "actNotFound");
        EXPECT_EQ(err.at("error_message").as_string(), "Account not found.");
    });
}

// normal case when only provide account
TEST_F(RPCAccountChannelsHandlerTest, DefaultParameterTest)
{
    static constexpr auto kCorrectOutput = R"JSON({
        "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
        "ledger_hash": "4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A652",
        "ledger_index": 30,
        "validated": true,
        "limit": 200,
        "channels": [
            {
                "channel_id": "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC321",
                "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
                "destination_account": "rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun",
                "amount": "100",
                "balance": "10",
                "settle_delay": 32,
                "public_key": "aBMxWrnPUnvwZPfsmTyVizxEGsGheAu3Tsn6oPRgyjgvd2NggFxz",
                "public_key_hex": "020000000000000000000000000000000000000000000000000000000000000000"
            },
            {
                "channel_id": "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC322",
                "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
                "destination_account": "rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun",
                "amount": "100",
                "balance": "10",
                "settle_delay": 32,
                "public_key": "aBMxWrnPUnvwZPfsmTyVizxEGsGheAu3Tsn6oPRgyjgvd2NggFxz",
                "public_key_hex": "020000000000000000000000000000000000000000000000000000000000000000"
            }
        ]
    })JSON";

    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index containing 2 indexes
    ripple::STObject const ownerDir =
        createOwnerDirLedgerObject({ripple::uint256{kIndex1}, ripple::uint256{kIndex2}}, kIndex1);

    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);

    // return two payment channel objects
    std::vector<Blob> bbs;
    ripple::STObject const channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    bbs.push_back(channel1.getSerializer().peekData());
    bbs.push_back(channel1.getSerializer().peekData());
    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}"
            }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(json::parse(kCorrectOutput), *output.result);
    });
}

// normal case : limit is used
TEST_F(RPCAccountChannelsHandlerTest, UseLimit)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(3);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index
    std::vector<ripple::uint256> indexes;
    std::vector<Blob> bbs;

    auto repetitions = 50;
    while ((repetitions--) != 0) {
        indexes.emplace_back(kIndex1);
        ripple::STObject const channel =
            createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
        bbs.push_back(channel.getSerializer().peekData());
    }
    ripple::STObject ownerDir = createOwnerDirLedgerObject(indexes, kIndex1);
    // it should not appear in return marker,marker is the current page
    ownerDir.setFieldU64(ripple::sfIndexNext, 99);
    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(7);

    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(3);

    runSpawn([this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 20
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);

        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 20);
        EXPECT_THAT(
            boost::json::value_to<std::string>(output.result->as_object().at("marker")),
            EndsWith(",0")
        );
    });

    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 9
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);  // todo: check limit?
    });

    runSpawn([this](auto yield) {
        auto const handler = AnyHandler{AccountChannelsHandler{backend_}};
        auto const input = json::parse(
            fmt::format(
                R"JSON({{
                    "account": "{}",
                    "limit": 401
                }})JSON",
                kAccount
            )
        );
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);  // todo: check limit?
    });
}

// normal case : destination is used
TEST_F(RPCAccountChannelsHandlerTest, UseDestination)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index
    std::vector<ripple::uint256> indexes;
    std::vector<Blob> bbs;

    // 10 pay channel to Account2
    auto repetitions = 10;
    while ((repetitions--) != 0) {
        indexes.emplace_back(kIndex1);
        ripple::STObject const channel =
            createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
        bbs.push_back(channel.getSerializer().peekData());
    }

    // 20 pay channel to Account3
    repetitions = 20;
    while ((repetitions--) != 0) {
        indexes.emplace_back(kIndex1);
        ripple::STObject const channel =
            createPaymentChannelLedgerObject(kAccount, kAccount3, 100, 10, 32, kTxnId, 28);
        bbs.push_back(channel.getSerializer().peekData());
    }

    ripple::STObject const ownerDir = createOwnerDirLedgerObject(indexes, kIndex1);
    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);

    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "limit": 30,
                "destination_account": "{}"
            }})JSON",
            kAccount,
            kAccount3
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 20);
    });
}

// normal case : but the lines is empty
TEST_F(RPCAccountChannelsHandlerTest, EmptyChannel)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index
    ripple::STObject const ownerDir = createOwnerDirLedgerObject({}, kIndex1);

    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}"
            }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 0);
    });
}

// Return expiration cancel_offer source_tag destination_tag when available
TEST_F(RPCAccountChannelsHandlerTest, OptionalResponseField)
{
    static constexpr auto kCorrectOutput = R"JSON({
        "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
        "ledger_hash": "4BC50C9B0D8515D3EAAE1E74B29A95804346C491EE1A95BF25E4AAB854A6A652",
        "ledger_index": 30,
        "validated": true,
        "limit": 200,
        "channels": [
            {
                "channel_id": "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC321",
                "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
                "destination_account": "rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun",
                "amount": "100",
                "balance": "10",
                "settle_delay": 32,
                "public_key": "aBMxWrnPUnvwZPfsmTyVizxEGsGheAu3Tsn6oPRgyjgvd2NggFxz",
                "public_key_hex": "020000000000000000000000000000000000000000000000000000000000000000",
                "expiration": 100,
                "cancel_after": 200,
                "source_tag": 300,
                "destination_tag": 400
            },
            {
                "channel_id": "E6DBAFC99223B42257915A63DFC6B0C032D4070F9A574B255AD97466726FC322",
                "account": "rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn",
                "destination_account": "rLEsXccBGNR3UPuPu2hUXPjziKC3qKSBun",
                "amount": "100",
                "balance": "10",
                "settle_delay": 32,
                "public_key": "aBMxWrnPUnvwZPfsmTyVizxEGsGheAu3Tsn6oPRgyjgvd2NggFxz",
                "public_key_hex": "020000000000000000000000000000000000000000000000000000000000000000",
                "expiration": 100,
                "cancel_after": 200,
                "source_tag": 300,
                "destination_tag": 400
            }
        ]
    })JSON";

    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index
    ripple::STObject const ownerDir =
        createOwnerDirLedgerObject({ripple::uint256{kIndex1}, ripple::uint256{kIndex2}}, kIndex1);

    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);

    // return two payment channel objects
    std::vector<Blob> bbs;
    ripple::STObject channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    channel1.setFieldU32(ripple::sfExpiration, 100);
    channel1.setFieldU32(ripple::sfCancelAfter, 200);
    channel1.setFieldU32(ripple::sfSourceTag, 300);
    channel1.setFieldU32(ripple::sfDestinationTag, 400);
    bbs.push_back(channel1.getSerializer().peekData());
    bbs.push_back(channel1.getSerializer().peekData());
    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);
    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}"
            }})JSON",
            kAccount
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(json::parse(kCorrectOutput), *output.result);
    });
}

// normal case : test marker output correct
TEST_F(RPCAccountChannelsHandlerTest, MarkerOutput)
{
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto ownerDirKk = ripple::keylet::ownerDir(account).key;
    static constexpr auto kNextPage = 99;
    static constexpr auto kLimit = 15;
    auto ownerDir2Kk = ripple::keylet::page(ripple::keylet::ownerDir(account), kNextPage).key;
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto fake = Blob{'f', 'a', 'k', 'e'};
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(3);

    std::vector<Blob> bbs;
    ripple::STObject const channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    // owner dir contains 10 indexes
    int objectsCount = 10;
    std::vector<ripple::uint256> indexes;
    while (objectsCount != 0) {
        // return owner index
        indexes.emplace_back(kIndex1);
        objectsCount--;
    }
    // return 15 objects
    objectsCount = 15;
    while (objectsCount != 0) {
        bbs.push_back(channel1.getSerializer().peekData());
        objectsCount--;
    }

    ripple::STObject ownerDir = createOwnerDirLedgerObject(indexes, kIndex1);
    ownerDir.setFieldU64(ripple::sfIndexNext, kNextPage);
    // first page 's next page is 99
    ON_CALL(*backend_, doFetchLedgerObject(ownerDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    ripple::STObject ownerDir2 = createOwnerDirLedgerObject(indexes, kIndex1);
    // second page's next page is 0
    ownerDir2.setFieldU64(ripple::sfIndexNext, 0);
    ON_CALL(*backend_, doFetchLedgerObject(ownerDir2Kk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir2.getSerializer().peekData()));

    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "limit": {}
            }})JSON",
            kAccount,
            kLimit
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(
            boost::json::value_to<std::string>(output.result->as_object().at("marker")),
            fmt::format("{},{}", kIndex1, kNextPage)
        );
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 15);
    });
}

// normal case : handler marker correctly
TEST_F(RPCAccountChannelsHandlerTest, MarkerInput)
{
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    static constexpr auto kNextPage = 99;
    static constexpr auto kLimit = 15;
    auto ownerDirKk = ripple::keylet::page(ripple::keylet::ownerDir(account), kNextPage).key;
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto fake = Blob{'f', 'a', 'k', 'e'};
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(3);

    std::vector<Blob> bbs;
    ripple::STObject const channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    int objectsCount = kLimit;
    std::vector<ripple::uint256> indexes;
    while (objectsCount != 0) {
        // return owner index
        indexes.emplace_back(kIndex1);
        bbs.push_back(channel1.getSerializer().peekData());
        objectsCount--;
    }

    ripple::STObject ownerDir = createOwnerDirLedgerObject(indexes, kIndex1);
    ownerDir.setFieldU64(ripple::sfIndexNext, 0);
    ON_CALL(*backend_, doFetchLedgerObject(ownerDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));

    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "limit": {},
                "marker": "{},{}"
            }})JSON",
            kAccount,
            kLimit,
            kIndex1,
            kNextPage
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_TRUE(output.result->as_object().if_contains("marker") == nullptr);
        // the first item is the marker itself, so the result will have limit-1
        // items
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), kLimit - 1);
    });
}

TEST_F(RPCAccountChannelsHandlerTest, LimitLessThanMin)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index containing 2 indexes
    ripple::STObject const ownerDir =
        createOwnerDirLedgerObject({ripple::uint256{kIndex1}, ripple::uint256{kIndex2}}, kIndex1);

    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);

    // return two payment channel objects
    std::vector<Blob> bbs;
    ripple::STObject const channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    bbs.push_back(channel1.getSerializer().peekData());
    bbs.push_back(channel1.getSerializer().peekData());
    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "limit": {}
            }})JSON",
            kAccount,
            AccountChannelsHandler::kLimitMin - 1
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 2);
        EXPECT_EQ(
            output.result->as_object().at("limit").as_uint64(), AccountChannelsHandler::kLimitMin
        );
    });
}

TEST_F(RPCAccountChannelsHandlerTest, LimitMoreThanMax)
{
    auto ledgerHeader = createLedgerHeader(kLedgerHash, 30);
    ON_CALL(*backend_, fetchLedgerBySequence).WillByDefault(Return(ledgerHeader));
    EXPECT_CALL(*backend_, fetchLedgerBySequence).Times(1);
    // fetch account object return something
    auto account = getAccountIdWithString(kAccount);
    auto accountKk = ripple::keylet::account(account).key;
    auto owneDirKk = ripple::keylet::ownerDir(account).key;
    auto fake = Blob{'f', 'a', 'k', 'e'};
    // return a non empty account
    ON_CALL(*backend_, doFetchLedgerObject(accountKk, testing::_, testing::_))
        .WillByDefault(Return(fake));

    // return owner index containing 2 indexes
    ripple::STObject const ownerDir =
        createOwnerDirLedgerObject({ripple::uint256{kIndex1}, ripple::uint256{kIndex2}}, kIndex1);

    ON_CALL(*backend_, doFetchLedgerObject(owneDirKk, testing::_, testing::_))
        .WillByDefault(Return(ownerDir.getSerializer().peekData()));
    EXPECT_CALL(*backend_, doFetchLedgerObject).Times(2);

    // return two payment channel objects
    std::vector<Blob> bbs;
    ripple::STObject const channel1 =
        createPaymentChannelLedgerObject(kAccount, kAccount2, 100, 10, 32, kTxnId, 28);
    bbs.push_back(channel1.getSerializer().peekData());
    bbs.push_back(channel1.getSerializer().peekData());
    ON_CALL(*backend_, doFetchLedgerObjects).WillByDefault(Return(bbs));
    EXPECT_CALL(*backend_, doFetchLedgerObjects).Times(1);

    auto const input = json::parse(
        fmt::format(
            R"JSON({{
                "account": "{}",
                "limit": {}
            }})JSON",
            kAccount,
            AccountChannelsHandler::kLimitMax + 1
        )
    );
    runSpawn([&, this](auto yield) {
        auto handler = AnyHandler{AccountChannelsHandler{this->backend_}};
        auto const output = handler.process(input, Context{yield});
        ASSERT_TRUE(output);
        EXPECT_EQ(output.result->as_object().at("channels").as_array().size(), 2);
        EXPECT_EQ(
            output.result->as_object().at("limit").as_uint64(), AccountChannelsHandler::kLimitMax
        );
    });
}