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import qbs 1.0
import qbs.File
import qbs.FileInfo
import qbs.ModUtils
import qbs.PathTools
import qbs.Process
import qbs.Utilities
import qbs.UnixUtils
import qbs.WindowsUtils
import 'gcc.js' as Gcc

CppModule {
    condition: false

    cxxStandardLibrary: {
        if (cxxLanguageVersion && qbs.toolchain.contains("clang")) {
            return cxxLanguageVersion !== "c++98" ? "libc++" : "libstdc++";
        }
    }

    property string target: [targetArch, targetVendor, targetSystem, targetAbi].join("-")
    property string targetArch: qbs.architecture === "x86" ? "i386" : qbs.architecture
    property string targetVendor: "unknown"
    property string targetSystem: "unknown"
    property string targetAbi: "unknown"

    property stringList transitiveSOs
    property string toolchainPrefix
    property path toolchainInstallPath
    assemblerName: 'as'
    compilerName: cxxCompilerName
    linkerName: cxxCompilerName
    property string archiverName: 'ar'
    property string nmName: 'nm'
    property string objcopyName: "objcopy"
    property string stripName: "strip"
    property string dsymutilName: "dsymutil"
    property path sysroot: qbs.sysroot

    property string exportedSymbolsCheckMode: "ignore-undefined"
    PropertyOptions {
        name: "exportedSymbolsCheckMode"
        allowedValues: ["strict", "ignore-undefined"]
        description: "Controls when we consider an updated dynamic library as changed with "
            + "regards to other binaries depending on it. The default is \"ignore-undefined\", "
            + "which means we do not care about undefined symbols being added or removed. "
            + "If you do care about that, e.g. because you link dependent products with an option "
            + "such as \"--no-undefined\", then you should set this property to \"strict\"."
    }

    property string toolchainPathPrefix: {
        var path = ''
        if (toolchainInstallPath) {
            path += toolchainInstallPath
            if (path.substr(-1) !== '/')
                path += '/'
        }
        if (toolchainPrefix)
            path += toolchainPrefix
        return path
    }

    property string compilerExtension: qbs.hostOS.contains("windows") ? ".exe" : ""
    property string cCompilerName: (qbs.toolchain.contains("clang") ? "clang" : "gcc")
                                   + compilerExtension
    property string cxxCompilerName: (qbs.toolchain.contains("clang") ? "clang++" : "g++")
                                     + compilerExtension

    compilerPathByLanguage: ({
        "c": toolchainPathPrefix + cCompilerName,
        "cpp": toolchainPathPrefix + cxxCompilerName,
        "objc": toolchainPathPrefix + cCompilerName,
        "objcpp": toolchainPathPrefix + cxxCompilerName,
        "asm_cpp": toolchainPathPrefix + cCompilerName
    })

    assemblerPath: toolchainPathPrefix + assemblerName
    compilerPath: toolchainPathPrefix + compilerName
    linkerPath: toolchainPathPrefix + linkerName
    property string archiverPath: toolchainPathPrefix + archiverName
    property string nmPath: toolchainPathPrefix + nmName
    property string objcopyPath: toolchainPathPrefix + objcopyName
    property string stripPath: toolchainPathPrefix + stripName
    property string dsymutilPath: toolchainPathPrefix + dsymutilName
    property stringList dsymutilFlags

    readonly property bool shouldCreateSymlinks: {
        return createSymlinks && internalVersion && qbs.targetOS.contains("unix");
    }

    readonly property string internalVersion: {
        if (product.version === undefined)
            return undefined;

        if (!Gcc.isNumericProductVersion(product.version)) {
            // Dynamic library version numbers like "A" or "B" are common on Apple platforms, so
            // don't restrict the product version to a componentized version number here.
            if (qbs.targetOS.contains("darwin"))
                return product.version;

            throw("product.version must be a string in the format x[.y[.z[.w]] "
                  + "where each component is an integer");
        }

        var maxVersionParts = 3;
        var versionParts = product.version.split('.').slice(0, maxVersionParts);

        // pad if necessary
        for (var i = versionParts.length; i < maxVersionParts; ++i)
            versionParts.push("0");

        return versionParts.join('.');
    }

    exceptionHandlingModel: {
        if (qbs.toolchain.contains("mingw")) {
            // https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html claims
            // __USING_SJLJ_EXCEPTIONS__ is defined as 1 when using SJLJ exceptions, but there don't
            // seem to be defines for the other models, so use the presence of the DLLs for now.
            var prefix = toolchainInstallPath;
            if (!qbs.hostOS.contains("windows"))
                prefix = FileInfo.joinPaths(toolchainInstallPath, "..", "lib", "gcc",
                                            toolchainPrefix,
                                            [compilerVersionMajor, compilerVersionMinor].join("."));
            var models = ["seh", "sjlj", "dw2"];
            for (var i = 0; i < models.length; ++i) {
                if (File.exists(FileInfo.joinPaths(prefix, "libgcc_s_" + models[i] + "-1.dll"))) {
                    return models[i];
                }
            }
        }
        return base;
    }

    validate: {
        var validator = new ModUtils.PropertyValidator("cpp");
        validator.setRequiredProperty("architecture", architecture,
                                      "you might want to re-run 'qbs-setup-toolchains'");
        validator.validate();
    }

    Rule {
        id: dynamicLibraryLinker
        multiplex: true
        inputs: {
            var tags = ["obj", "linkerscript", "versionscript"];
            if (product.type.contains("dynamiclibrary") &&
                product.moduleProperty("qbs", "targetOS").contains("darwin") &&
                product.moduleProperty("bundle", "embedInfoPlist"))
                tags.push("aggregate_infoplist");
            return tags;
        }
        inputsFromDependencies: ["dynamiclibrary_copy", "staticlibrary"]

        outputFileTags: ["dynamiclibrary", "dynamiclibrary_symlink", "dynamiclibrary_copy", "debuginfo"]
        outputArtifacts: {
            var lib = {
                filePath: product.destinationDirectory + "/"
                          + PathTools.dynamicLibraryFilePath(product),
                fileTags: ["dynamiclibrary"]
            };
            var libCopy = {
                // Copy of libfoo for smart re-linking.
                filePath: product.destinationDirectory + "/.socopy/"
                          + PathTools.dynamicLibraryFilePath(product),
                fileTags: ["dynamiclibrary_copy"],
                alwaysUpdated: false,
                cpp: { transitiveSOs: Gcc.collectTransitiveSos(inputs) }
            };
            var artifacts = [lib, libCopy];

            if (ModUtils.moduleProperty(product, "shouldCreateSymlinks") && !product.moduleProperty("bundle", "isBundle")) {
                var maxVersionParts = Gcc.isNumericProductVersion(product.version) ? 3 : 1;
                for (var i = 0; i < maxVersionParts; ++i) {
                    var symlink = {
                        filePath: product.destinationDirectory + "/"
                                  + PathTools.dynamicLibraryFileName(product, undefined, i),
                        fileTags: ["dynamiclibrary_symlink"]
                    };
                    if (i > 0 && artifacts[i-1].filePath == symlink.filePath)
                        break; // Version number has less than three components.
                    artifacts.push(symlink);
                }
            }
            return artifacts.concat(Gcc.debugInfoArtifacts(product));
        }

        prepare: {
            return Gcc.prepareLinker.apply(this, arguments);
        }
    }

    Rule {
        id: staticLibraryLinker
        multiplex: true
        inputs: ["obj", "linkerscript"]
        inputsFromDependencies: ["dynamiclibrary", "staticlibrary"]

        Artifact {
            filePath: product.destinationDirectory + "/" + PathTools.staticLibraryFilePath(product)
            fileTags: ["staticlibrary"]
            cpp.staticLibraries: {
                var result = [];
                for (var i in inputs.staticlibrary) {
                    var lib = inputs.staticlibrary[i]
                    result = Gcc.concatLibs(result, [lib.filePath].concat(
                                            ModUtils.moduleProperties(lib, 'staticLibraries')));
                }
                result = Gcc.concatLibs(result,
                                        ModUtils.moduleProperties(product, 'staticLibraries'));
                return result
            }
            cpp.dynamicLibraries: {
                var result = [];
                for (var i in inputs.dynamiclibrary)
                    result.push(inputs.dynamiclibrary[i].filePath);
                result = result.concat(ModUtils.moduleProperties(product, 'dynamicLibraries'));
                return result
            }
        }

        prepare: {
            var args = ['rcs', output.filePath];
            for (var i in inputs.obj)
                args.push(inputs.obj[i].filePath);
            var cmd = new Command(ModUtils.moduleProperty(product, "archiverPath"), args);
            cmd.description = 'creating ' + output.fileName;
            cmd.highlight = 'linker'
            cmd.responseFileUsagePrefix = '@';
            return cmd;
        }
    }

    Rule {
        id: loadableModuleLinker
        multiplex: true
        inputs: {
            var tags = ["obj", "linkerscript"];
            if (product.type.contains("loadablemodule") &&
                product.moduleProperty("qbs", "targetOS").contains("darwin") &&
                product.moduleProperty("bundle", "embedInfoPlist"))
                tags.push("aggregate_infoplist");
            return tags;
        }
        inputsFromDependencies: ["dynamiclibrary_copy", "staticlibrary"]

        outputFileTags: ["loadablemodule", "debuginfo"]
        outputArtifacts: {
            var app = {
                filePath: FileInfo.joinPaths(product.destinationDirectory,
                                             PathTools.loadableModuleFilePath(product)),
                fileTags: ["loadablemodule"]
            }
            return [app].concat(Gcc.debugInfoArtifacts(product));
        }

        prepare: {
            return Gcc.prepareLinker.apply(this, arguments);
        }
    }

    Rule {
        id: applicationLinker
        multiplex: true
        inputs: {
            var tags = ["obj", "linkerscript"];
            if (product.type.contains("application") &&
                product.moduleProperty("qbs", "targetOS").contains("darwin") &&
                product.moduleProperty("bundle", "embedInfoPlist"))
                tags.push("aggregate_infoplist");
            return tags;
        }
        inputsFromDependencies: ["dynamiclibrary_copy", "staticlibrary"]

        outputFileTags: ["application", "debuginfo"]
        outputArtifacts: {
            var app = {
                filePath: FileInfo.joinPaths(product.destinationDirectory,
                                             PathTools.applicationFilePath(product)),
                fileTags: ["application"]
            }
            return [app].concat(Gcc.debugInfoArtifacts(product));
        }

        prepare: {
            return Gcc.prepareLinker.apply(this, arguments);
        }
    }

    Rule {
        id: compiler
        inputs: ["cpp", "c", "objcpp", "objc", "asm_cpp"]
        auxiliaryInputs: ["hpp"]
        explicitlyDependsOn: ["c_pch", "cpp_pch", "objc_pch", "objcpp_pch"]

        Artifact {
            fileTags: ["obj"]
            filePath: FileInfo.joinPaths(".obj", Utilities.getHash(input.baseDir), input.fileName + ".o")
        }

        prepare: {
            return Gcc.prepareCompiler.apply(this, arguments);
        }
    }

    Rule {
        id: assembler
        inputs: ["asm"]

        Artifact {
            fileTags: ["obj"]
            filePath: FileInfo.joinPaths(".obj", Utilities.getHash(input.baseDir), input.fileName + ".o")
        }

        prepare: {
            return Gcc.prepareAssembler.apply(this, arguments);
        }
    }

    Rule {
        inputs: ["c_pch_src"]
        explicitlyDependsOn: ["hpp"]
        Artifact {
            filePath: product.name + "_c.gch"
            fileTags: ["c_pch"]
        }
        prepare: {
            return Gcc.prepareCompiler.apply(this, arguments);
        }
    }

    Rule {
        inputs: ["cpp_pch_src"]
        explicitlyDependsOn: ["hpp"]
        Artifact {
            filePath: product.name + "_cpp.gch"
            fileTags: ["cpp_pch"]
        }
        prepare: {
            return Gcc.prepareCompiler.apply(this, arguments);
        }
    }

    Rule {
        inputs: ["objc_pch_src"]
        explicitlyDependsOn: ["hpp"]
        Artifact {
            filePath: product.name + "_objc.gch"
            fileTags: ["objc_pch"]
        }
        prepare: {
            return Gcc.prepareCompiler.apply(this, arguments);
        }
    }

    Rule {
        inputs: ["objcpp_pch_src"]
        explicitlyDependsOn: ["hpp"]
        Artifact {
            filePath: product.name + "_objcpp.gch"
            fileTags: ["objcpp_pch"]
        }
        prepare: {
            return Gcc.prepareCompiler.apply(this, arguments);
        }
    }

    FileTagger {
        patterns: "*.s"
        fileTags: ["asm"]
    }

    FileTagger {
        patterns: "*.S"
        fileTags: ["asm_cpp"]
    }

    FileTagger {
        patterns: "*.sx"
        fileTags: ["asm_cpp"]
    }
}