package net.corda.finance.contracts.universal

import net.corda.finance.contracts.FixOf
import net.corda.finance.contracts.Tenor
import net.corda.testing.core.SerializationEnvironmentRule
import org.junit.Ignore
import org.junit.Rule
import org.junit.Test
import java.time.Instant
import java.time.LocalDate

class Caplet {
    @Rule
    @JvmField
    val testSerialization = SerializationEnvironmentRule()
    val TEST_TX_TIME_1: Instant get() = Instant.parse("2017-09-02T12:00:00.00Z")

    val tradeDate: LocalDate = LocalDate.of(2016, 9, 1)

    val notional = 50.M
    val currency = EUR

    val contract = arrange {
        actions {
            (acmeCorp or highStreetBank) may {
                "exercise" anytime {
                    val floating = interest(notional, "act/365", fix("LIBOR", tradeDate, Tenor("6M")), "2016-04-01", "2016-10-01")
                    val fixed = interest(notional, "act/365", 0.5.bd, "2016-04-01", "2016-10-01")
                    highStreetBank.owes(acmeCorp, (floating - fixed).plus(), currency)
                }
            }
        }
    }

    val contractFixed = arrange {
        actions {
            (acmeCorp or highStreetBank) may {
                "exercise" anytime {
                    val floating = interest(notional, "act/365", 1.0.bd, "2016-04-01", "2016-10-01")
                    val fixed = interest(notional, "act/365", 0.5.bd, "2016-04-01", "2016-10-01")
                    highStreetBank.owes(acmeCorp, (floating - fixed).plus(), currency)
                }
            }
        }
    }

    val contractFinal = arrange { highStreetBank.owes(acmeCorp, 250.K, EUR) }

    val stateStart = UniversalContract.State(listOf(DUMMY_NOTARY), contract)

    val stateFixed = UniversalContract.State(listOf(DUMMY_NOTARY), contractFixed)

    val stateFinal = UniversalContract.State(listOf(DUMMY_NOTARY), contractFinal)
    @Test
    fun issue() {
        transaction {
            output(UNIVERSAL_PROGRAM_ID, stateStart)
            timeWindow(TEST_TX_TIME_1)

            tweak {
                command(acmeCorp.owningKey, UniversalContract.Commands.Issue())
                this `fails with` "the transaction is signed by all liable parties"
            }
            command(highStreetBank.owningKey, UniversalContract.Commands.Issue())
            this.verifies()
        }
    }

    @Test
    fun execute() {
        transaction {
            input(UNIVERSAL_PROGRAM_ID, stateFixed)
            output(UNIVERSAL_PROGRAM_ID, stateFinal)
            timeWindow(TEST_TX_TIME_1)

            tweak {
                command(highStreetBank.owningKey, UniversalContract.Commands.Action("some undefined name"))
                this `fails with` "action must be defined"
            }
            command(highStreetBank.owningKey, UniversalContract.Commands.Action("exercise"))
            this.verifies()
        }
    }

    @Test
    fun fixing() {
        transaction {
            input(UNIVERSAL_PROGRAM_ID, stateStart)
            output(UNIVERSAL_PROGRAM_ID, stateFixed)
            timeWindow(TEST_TX_TIME_1)

            tweak {
                command(highStreetBank.owningKey, UniversalContract.Commands.Action("some undefined name"))
                this `fails with` "action must be defined"
            }

            tweak {
                // wrong source
                command(highStreetBank.owningKey, UniversalContract.Commands.Fix(listOf(net.corda.finance.contracts.Fix(FixOf("LIBORx", tradeDate, Tenor("6M")), 1.0.bd))))
                this `fails with` "relevant fixing must be included"
            }

            tweak {
                // wrong date
                command(highStreetBank.owningKey, UniversalContract.Commands.Fix(listOf(net.corda.finance.contracts.Fix(FixOf("LIBOR", tradeDate.plusYears(1), Tenor("6M")), 1.0.bd))))
                this `fails with` "relevant fixing must be included"
            }

            tweak {
                // wrong tenor
                command(highStreetBank.owningKey, UniversalContract.Commands.Fix(listOf(net.corda.finance.contracts.Fix(FixOf("LIBOR", tradeDate, Tenor("3M")), 1.0.bd))))
                this `fails with` "relevant fixing must be included"
            }

            tweak {
                command(highStreetBank.owningKey, UniversalContract.Commands.Fix(listOf(net.corda.finance.contracts.Fix(FixOf("LIBOR", tradeDate, Tenor("6M")), 1.5.bd))))
                this `fails with` "output state does not reflect fix command"
            }
            command(highStreetBank.owningKey, UniversalContract.Commands.Fix(listOf(net.corda.finance.contracts.Fix(FixOf("LIBOR", tradeDate, Tenor("6M")), 1.0.bd))))
            this.verifies()
        }
    }

    @Test @Ignore
    fun `pretty print`() {
        println ( prettyPrint(contract) )

        println ( prettyPrint(contractFixed) )

        println ( prettyPrint(contractFinal) )
    }


}
