function IsDirectoryExist(dirname)
    return os.rename(dirname, dirname) and true or false
end

local jdtls = require("jdtls")
local root_markers = { ".git", "mvnw", "gradlew", "pom.xml", "build.gradle" }
local root_dir = require("jdtls.setup").find_root(root_markers)
if root_dir == "" then
    return
end
local project_name = vim.fn.fnamemodify(vim.fn.getcwd(), ":p:h:t")
local home = os.getenv("HOME")
local jdtls_home = home .. "/.jdtls"
local plugins_home = jdtls_home .. "/plugins"
local workspace = jdtls_home .. "/workspace/" .. project_name

-- create when workspace not exist
if not IsDirectoryExist(workspace) then
    os.execute("mkdir " .. workspace)
end

local launcher = plugins_home .. "/org.eclipse.equinox.launcher_1.6.400.v20210924-0641.jar"
local configuration = jdtls_home .. "/config_linux"
if vim.loop.os_uname().sysname == "Windows" then
    configuration = jdtls_home .. "\\config_win"
end

local config = {
    flags = {
        debounce_text_changes = 80,
    },
    on_attach = common_lsp_on_attach,
    cmd = {
        "java",
        "-Declipse.application=org.eclipse.jdt.ls.core.id1",
        "-Dosgi.bundles.defaultStartLevel=4",
        "-Declipse.product=org.eclipse.jdt.ls.core.product",
        "-Dlog.protocol=true",
        "-Dlog.level=ALL",
        "-Xmx1g",
        "--add-modules=ALL-SYSTEM",
        "--add-opens",
        "java.base/java.util=ALL-UNNAMED",
        "--add-opens",
        "java.base/java.lang=ALL-UNNAMED",
        "-javaagent:" .. jdtls_home .. "/bin/lombok.jar",
        "-jar",
        launcher,
        "-configuration",
        configuration,
        "-data",
        workspace,
    },
    root_dir = root_dir,
    settings = {
        java = {
            maven = {
                downloadSources = true,
            },
            eclipse = {
                downloadSources = true,
            },
            implementationsCodeLens = {
                enabled = true,
            },
            referencesCodeLens = {
                enabled = true,
            },
            references = {
                includeDecompiledSources = true,
            },
            format = {
                enabled = true,
                settings = {
                    url = vim.fn.stdpath("config") .. "intellij-java-google-style.xml",
                    profile = "GoogleStyle",
                },
            },
            signatureHelp = { enabled = true },
            contentProvider = { preferred = "fernflower" }, -- Use fernflower to decompile library code
            completion = {
                favoriteStaticMembers = {
                    "org.hamcrest.MatcherAssert.assertThat",
                    "org.hamcrest.Matchers.*",
                    "org.hamcrest.CoreMatchers.*",
                    "org.junit.jupiter.api.Assertions.*",
                    "java.util.Objects.requireNonNull",
                    "java.util.Objects.requireNonNullElse",
                    "org.mockito.Mockito.*",
                },
                filteredTypes = {
                    "com.sun.*",
                    "io.micrometer.shaded.*",
                    "java.awt.*",
                    "jdk.*",
                    "sun.*",
                },
            },
            sources = {
                organizeImports = {
                    starThreshold = 9999,
                    staticStarThreshold = 9999,
                },
            },
            codeGeneration = {
                toString = {
                    template = "${object.className}{${member.name()}=${member.value}, ${otherMembers}}",
                },
                hashCodeEquals = {
                    useJava7Objects = true,
                },
                useBlocks = true,
            },
        },
    },

    init_options = {
        bundles = {},
    },
}
jdtls.start_or_attach(config)