package("libsdl")
    set_homepage("https://www.libsdl.org/")
    set_description("Simple DirectMedia Layer")
	
    if is_plat("mingw") and is_subhost("msys") then
        add_extsources("pacman::SDL2")
    elseif is_plat("linux") then
        add_extsources("pacman::sdl2", "apt::libsdl2-dev")
    elseif is_plat("macosx") then
        add_extsources("brew::sdl2")
    end

    set_license("zlib")

    add_urls("https://www.libsdl.org/release/SDL2-$(version).zip",
             "https://github.com/libsdl-org/SDL/releases/download/release-$(version)/SDL2-$(version).zip", { alias = "archive" })
    add_urls("https://github.com/libsdl-org/SDL.git", { alias = "github" })
    add_versions("archive:2.0.8", "e6a7c71154c3001e318ba7ed4b98582de72ff970aca05abc9f45f7cbdc9088cb")
    add_versions("archive:2.0.12", "476e84d6fcbc499cd1f4a2d3fd05a924abc165b5d0e0d53522c9604fe5a021aa")
    add_versions("archive:2.0.14", "2c1e870d74e13dfdae870600bfcb6862a5eab4ea5b915144aff8d75a0f9bf046")
    add_versions("archive:2.0.16", "010148866e2226e5469f2879425d28ff7c572c736cb3fb65a0604c3cde6bfab9")
    add_versions("archive:2.0.18", "2d96cc82020341f7f5957c42001ad526e15fbb7056be8a74dab302483e97aa24")
    add_versions("archive:2.0.20", "cc8b16a326eb082c1f48ca30fdf471acfd2334b69bd7527e65ac58369013a1ba")
    add_versions("archive:2.0.22", "9a81ab724e6dcef96c61a4a2ebe7758e5b8bb191794650d276a20d5148fbd50c")
    add_versions("archive:2.24.0", "4b065503d45652d5f65d807fe98c757c73af2968727945b596861995bc3b69c2")
    add_versions("archive:2.24.2", "7fae98ac4e7b39eb2511fc27c2e84b220ac69b5296ff41f833b967c891f9d2ac")
    add_versions("archive:2.26.0", "4a181f158f88676816e4993d7e97e7b48ef273aa6f4e2909c6a85497e9af3e9f")
    add_versions("archive:2.26.1", "c038222fcac6ccc448daaa3febcae93fdac401aed12fd60da3b7939529276b1b")
    add_versions("github:2.0.8",  "release-2.0.8")
    add_versions("github:2.0.12", "release-2.0.12")
    add_versions("github:2.0.14", "release-2.0.14")
    add_versions("github:2.0.16", "release-2.0.16")
    add_versions("github:2.0.18", "release-2.0.18")
    add_versions("github:2.0.20", "release-2.0.20")
    add_versions("github:2.0.22", "release-2.0.22")
    add_versions("github:2.24.0", "release-2.24.0")
    add_versions("github:2.24.2", "release-2.24.2")
    add_versions("github:2.26.0", "release-2.26.0")
    add_versions("github:2.26.1", "release-2.26.1")

    add_deps("cmake")

    add_includedirs("include", "include/SDL2")

    add_configs("use_sdlmain", {description = "Use SDL_main entry point", default = true, type = "boolean"})
    if is_plat("linux") then
        add_configs("with_x", {description = "Enables X support (requires it on the system)", default = true, type = "boolean"})
    end

    on_load(function (package)
        if package:config("use_sdlmain") then
            package:add("components", "main")
        end
        package:add("components", "lib")
        if package:is_plat("linux") and package:config("with_x") then
            package:add("deps", "libxext", {private = true})
        end
    end)

    on_component("main", function (package, component)
        component:add("links", "SDL2main")
        component:add("defines", "SDL_MAIN_HANDLED")
        component:add("deps", "lib")
    end)

    on_component("lib", function (package, component)
        if package:config("shared") then
            component:add("links", "SDL2")
        else
            component:add("links", package:is_plat("windows") and "SDL2-static" or "SDL2")
            if package:is_plat("windows", "mingw") then
                component:add("syslinks", "user32", "gdi32", "winmm", "imm32", "ole32", "oleaut32", "version", "uuid", "advapi32", "setupapi", "shell32")
            elseif package:is_plat("linux", "bsd") then
                component:add("syslinks", "pthread", "dl")
                if package:is_plat("bsd") then 
                    component:add("syslinks", "usbhid")
                end
            elseif package:is_plat("android") then
                component:add("syslinks", "dl", "log", "android", "GLESv1_CM", "GLESv2", "OpenSLES")
            elseif package:is_plat("iphoneos", "macosx") then
                component:add("frameworks", "AudioToolbox", "AVFoundation", "CoreAudio", "CoreVideo", "Foundation", "Metal", "QuartzCore")
		component:add("syslinks", "iconv")
                if package:is_plat("macosx") then
                    component:add("frameworks", "Cocoa", "Carbon", "ForceFeedback", "IOKit")
                else
                    component:add("frameworks", "CoreBluetooth", "CoreGraphics", "CoreMotion", "OpenGLES", "UIKit")
		end
                if package:version():ge("2.0.14") then
                    package:add("frameworks", "CoreHaptics", "GameController")
                end
            end
        end
    end)

    on_fetch("linux", "macosx", "bsd", function (package, opt)
        if opt.system then
            -- use sdl2-config
            local sdl2conf = try {function() return os.iorunv("sdl2-config", {"--version", "--cflags", "--libs"}) end}
            if sdl2conf then
                sdl2conf = os.argv(sdl2conf)
                local sdl2ver = table.remove(sdl2conf, 1)
                local result = {version = sdl2ver}
                for _, flag in ipairs(sdl2conf) do
                    if flag:startswith("-L") and #flag > 2 then
                        -- get linkdirs
                        local linkdir = flag:sub(3)
                        if linkdir and os.isdir(linkdir) then
                            result.linkdirs = result.linkdirs or {}
                            table.insert(result.linkdirs, linkdir)
                        end
                    elseif flag:startswith("-I") and #flag > 2 then
                        -- get includedirs
                        local includedir = flag:sub(3)
                        if includedir and os.isdir(includedir) then
                            result.includedirs = result.includedirs or {}
                            table.insert(result.includedirs, includedir)
                        end
                    elseif flag:startswith("-l") and #flag > 2 then
                        -- get links
                        local link = flag:sub(3)
                        result.links = result.links or {}
                        table.insert(result.links, link)
                    elseif flag:startswith("-D") and #flag > 2 then
                        -- get defines
                        local define = flag:sub(3)
                        result.defines = result.defines or {}
                        table.insert(result.defines, define)
                    end
                end

                return result
            end

            -- finding using sdl2-config didn't work, fallback on pkgconfig
            if package.find_package then
                return package:find_package("pkgconfig::sdl2", opt)
            else
                return find_package("pkgconfig::sdl2", opt)
            end
        end
    end)

    on_install(function (package)
        local configs = {}
        table.insert(configs, "-DCMAKE_BUILD_TYPE=" .. (package:debug() and "Debug" or "Release"))
        table.insert(configs, "-DBUILD_SHARED_LIBS=" .. (package:config("shared") and "ON" or "OFF"))
        table.insert(configs, "-DSDL_TEST=OFF")
        local opt
        if package:is_plat("linux", "cross") then
            local includedirs = {}
            for _, depname in ipairs({"libxext", "libx11", "xorgproto"}) do
                local dep = package:dep(depname)
                if dep then
                    local depfetch = dep:fetch()
                    if depfetch then
                        for _, includedir in ipairs(depfetch.includedirs or depfetch.sysincludedirs) do
                            table.insert(includedirs, includedir)
                        end
                    end
                end
            end
            if #includedirs > 0 then
                includedirs = table.unique(includedirs)

                local cflags = {}
                opt = opt or {}
                opt.cflags = cflags
                for _, includedir in ipairs(includedirs) do
                    table.insert(cflags, "-I" .. includedir)
                end
                table.insert(configs, "-DCMAKE_INCLUDE_PATH=" .. table.concat(includedirs, ";"))
            end
        elseif package:is_plat("bsd") then
            opt = opt or {}
            opt.packagedeps = "libusb"
        elseif package:is_plat("wasm") then
            -- emscripten enables USE_SDL by default which will conflict with the sdl headers 
            opt = opt or {}
            opt.cflags = {"-sUSE_SDL=0"}
        end
        import("package.tools.cmake").install(package, configs, opt)
    end)

    on_test(function (package)
        assert(package:has_cfuncs("SDL_Init", {includes = "SDL2/SDL.h", configs = {defines = "SDL_MAIN_HANDLED"}}))
    end)