//
//  BitcoinTests.swift
//  OS Vault
//
//  Author: Simon-Pierre Boucher
//  Mail: contact@spboucher.ai
//

import XCTest
import BitcoinDevKit
@testable import OSVaultKit

final class BitcoinTests: XCTestCase {

    // Official BIP-84 test vector (public, not a real wallet): the
    // all-"abandon" mnemonic must derive these first addresses at m/84'/0'/0'.
    let vectorMnemonic = "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about"

    func testBIP84VectorFirstAddress() throws {
        let (external, internalD) = try BitcoinService.secretDescriptors(
            mnemonic: vectorMnemonic, network: .mainnet)
        let wallet = try Wallet(descriptor: external, changeDescriptor: internalD,
                                network: .bitcoin, persister: Persister.newInMemory())
        let first = wallet.revealNextAddress(keychain: .external)
        XCTAssertEqual(first.address.description, "bc1qcr8te4kr609gcawutmrza0j4xv80jy8z306fyu")
        let second = wallet.revealNextAddress(keychain: .external)
        XCTAssertEqual(second.address.description, "bc1qnjg0jd8228aq7egyzacy8cys3knf9xvrerkf9g")
        let change = wallet.revealNextAddress(keychain: .internal)
        XCTAssertEqual(change.address.description, "bc1q8c6fshw2dlwun7ekn9qwf37cu2rn755upcp6el")
    }

    func testPublicDescriptorsAreWatchOnly() throws {
        let (external, _) = try BitcoinService.publicDescriptors(
            mnemonic: vectorMnemonic, network: .mainnet)
        // A public descriptor must not contain private key material.
        XCTAssertFalse(external.description.contains("xprv"))
        XCTAssertTrue(external.description.contains("xpub"))
    }

    func testAddressValidationPerNetwork() {
        XCTAssertTrue(BitcoinService.validate(
            address: "bc1qcr8te4kr609gcawutmrza0j4xv80jy8z306fyu", network: .mainnet))
        XCTAssertFalse(BitcoinService.validate(
            address: "bc1qcr8te4kr609gcawutmrza0j4xv80jy8z306fyu", network: .signet))
        XCTAssertFalse(BitcoinService.validate(address: "not-an-address", network: .mainnet))
        XCTAssertFalse(BitcoinService.validate(
            address: "0x9858EfFD232B4033E47d90003D41EC34EcaEda94", network: .mainnet))
    }

    func testBTCAmountParsing() {
        XCTAssertEqual(BitcoinService.parseBTC("1"), 100_000_000)
        XCTAssertEqual(BitcoinService.parseBTC("0.00000001"), 1)
        XCTAssertNil(BitcoinService.parseBTC("0.000000001"))   // sub-sat
        XCTAssertEqual(BitcoinService.formatBTC(150_000_000), "1.5")
        XCTAssertEqual(BitcoinService.formatBTC(1), "0.00000001")
    }
}