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// swift-tools-version:5.2

import PackageDescription
import Foundation

var testCombine = ProcessInfo.processInfo.environment["CX_TEST_COMBINE"] != nil
// uncommenet the following line to test against combine
// testCombine = true
let combineImpFlag: [SwiftSetting] = testCombine ? [.define("USE_COMBINE")] : [.define("USE_COMBINEX")]
let shimDep: [Target.Dependency] = testCombine ? ["_CXCompatible"] : ["CombineX", "CXFoundation"]

let package = Package(
    name: "CombineX",
    products: [
        .library(name: "CombineX", targets: ["CombineX", "CXFoundation"]),
    ],
    dependencies: [
        .package(url: "https://github.com/apple/swift-atomics.git", .upToNextMinor(from: "0.0.3")),
        .package(url: "https://github.com/Quick/Quick.git", from: "3.0.0"),
        .package(url: "https://github.com/Quick/Nimble.git", from: "9.0.0"),
        .package(url: "https://github.com/ddddxxx/Semver.git", .upToNextMinor(from: "0.2.1")),
    ],
    targets: [
        .target(name: "CXUtility"),
        .target(
            name: "CombineX",
            dependencies: [
                "CXUtility",
                .product(name: "Atomics", package: "swift-atomics")],
            swiftSettings: [.define("CX_LOCK_FREE_ATOMIC")]),
        .target(
            name: "CXFoundation",
            dependencies: ["CXUtility", "CombineX"]),
        
        // We have circular dependency CombineXTests -> CXTest -> CXShim -> CombineX
        //
        // Use git submodule instead of SPM dependency. also add underscore
        // prefix to prevent name collision
        .target(
            name: "_CXCompatible"),
        .target(
            name: "_CXShim",
            dependencies: shimDep,
            swiftSettings: [.define("CX_PRIVATE_SHIM")] + combineImpFlag),
        .target(
            name: "_CXTest",
            dependencies: ["_CXShim"],
            swiftSettings: [.define("CX_PRIVATE_SHIM")]),
        
        
        .target(
            name: "CXTestUtility",
            dependencies: ["CXUtility", "_CXShim", "_CXTest", "Semver", "Quick", "Nimble"],
            swiftSettings: combineImpFlag),
        .testTarget(
            name: "CombineXTests",
            dependencies: ["CXTestUtility", "CXUtility", "Quick", "Nimble"],
            swiftSettings: combineImpFlag),
        .testTarget(
            name: "CXFoundationTests",
            dependencies: ["CXTestUtility", "Quick", "Nimble"]),
        .testTarget(
            name: "CXInconsistentTests",
            dependencies: ["CXTestUtility", "CXUtility", "Quick", "Nimble"]),
    ]
)

if testCombine {
    package.platforms = [.macOS("10.15"), .iOS("13.0"), .tvOS("13.0"), .watchOS("6.0")]
}