local kPathPrefix = "!"

local function normalizeCpyPath(absPath)
    return "../../" .. path.getrelative(Aurora.Settings.sAbsRoot, absPath)
end

-- file name, type, directory, extension, is windows, configuration, real name
local function formatCpy(name, type, dir, ex, iswin, config, platformName, arch, realName)     
    local pathSuffix = "";

    if (iswin) then
        pathSuffix = "*\"";
    else
        pathSuffix = "\"";
    end

    if (Aurora.Settings.bDefinePartialABIInTargetName) then
        name = string.format("%s.%s.%s.%s", name, config, platformName:gsub("^%l", string.upper), arch)
    end

    local outputPath    = string.format("%s/%s%s", dir, name, ex)
    local outputTarget  = string.format("%s/%s", dir, name)
    local uglyBuildPath = string.format("%%{cfg.targetdir}/%s%s", name, ex)
    
    return string.format("{COPY} \"%s\" \"%s%s", uglyBuildPath, outputPath, pathSuffix), outputPath, uglyBuildPath
end

local function gnuCoreUtilsMkdirRecursive(dir)     
    return string.format("mkdir -p \"%s\"", dir);
end

local function archiveShipPdb(pdbPath)
    -- TODO (reece):
end

local function isNoLinkType(projectType)
    return projectType == "StaticLib" or projectType == "Blank" or projectType == "Utility"
end

local function addUserDestCopy(name, type, config, platformName, arch, dir)
    local isWin = platformName == "win32"
    local debugSymbolPath = nil

    local platform = Aurora.Platforms[platformName]
    if (not platform) then
        return
    end

    local ext = (platform.exts or {})[type] or ""

    local copy, outputPath, file = formatCpy(Aurora.Settings.sLibPrefix .. name, type, dir, ext, isWin, config, platformName, arch, name)

    if (platform.devChainCoreUtils) then
        gnuCoreUtilsMkdirRecursive(dir)
    end

    if (platform.devChainRequiresElfStrip and
        platform.devChainSupportsElfStrip and
        config ~= Aurora.Settings.sNameOfDebug) then
        local debugSymbolPath = normalizeCpyPath(Aurora.Settings.sAbsSymbols) .. "/" .. name .. ".dwarf"
        postbuildcommands("objcopy --strip-debug " .. file .. " " .. outputPath)
        if (Aurora.Settings.bUseAuBuildHooks and config ~= Aurora.Settings.sNameOfShip) then
            postbuildcommands("objcopy --add-gnu-debuglink=" .. debugSymbolPath .. " " .. outputPath)
        end
    else
        postbuildcommands(copy)
    end
end

local function addDest(name, projectType, dest)
    local lookup = {}
    local append = ""
    
    if (isNoLinkType(projectType)) then
        return
    end

    if (dest:starts(kPathPrefix)) then
        append = dest:sub(#kPathPrefix + 1)
        local fu = auFilterConfig(Aurora.Settings.sNameOfDebug)

        lookup[Aurora.Settings.sNameOfDebug] = normalizeCpyPath(Aurora.Settings.sAbsDebug)
        lookup[Aurora.Settings.sNameOfInternal] = normalizeCpyPath(Aurora.Settings.sAbsStage)
        lookup[Aurora.Settings.sNameOfShip] = normalizeCpyPath(Aurora.Settings.sAbsShip)
    else
        lookup[Aurora.Settings.sNameOfDebug] = dest
        lookup[Aurora.Settings.sNameOfInternal] = dest
        lookup[Aurora.Settings.sNameOfShip] = dest
    end

    auFilterForConfigPlatforms(function(config, platform, arch)
        addUserDestCopy(name, projectType, config, platform, arch, lookup[config] .. append)
    end)
end

local function postBuildCommands(name, type, config, platformName, arch)
    local isWin = platformName == "win32"

    if (isWin) then
        postbuildcommands(formatCpy(Aurora.Settings.sLibPrefix .. name, type, normalizeCpyPath(Aurora.Settings.sAbsSymbols), ".pdb", true, config, platformName, arch, name))

        if (type == "SharedLib" or 
            type == "StaticLib") then
            postbuildcommands(formatCpy(Aurora.Settings.sLibPrefix .. name, type, normalizeCpyPath(Aurora.Settings.sRelLinkLibs), ".lib", true, config, platformName, arch, name))
        end
    else
        if (type == "SharedLib" or 
            type == "StaticLib") then
            postbuildcommands(formatCpy(Aurora.Settings.sLibPrefix .. name, type, normalizeCpyPath(Aurora.Settings.sRelLinkLibs), ext, true, config, platformName, arch, name))
        end
    end

    if (config ~= Aurora.Settings.sNameOfDebug) then
        local platform = Aurora.Platforms[platformName]
        if (not platform) then
            return
        end

        local debugSymbolPath = nil

        if (platform.devChainRequiresElfStrip and
            platform.devChainSupportsElfStrip) then
            debugSymbolPath = normalizeCpyPath(Aurora.Settings.sAbsSymbols) .. "/" .. name .. ".dwarf"
            postbuildcommands("objcopy --only-keep-debug " .. file .. " " .. debugSymbolPath)
        elseif (isWin) then
            debugSymbolPath = normalizeCpyPath(Aurora.Settings.sAbsSymbols) .. "/" .. name .. ".pdb"
        end

        if (debugSymbolPath and 
            config == Aurora.Settings.sNameOfShip) then
            archiveShipPdb(debugSymbolPath)
        end
    else
        postbuildcommands(copy)
    end
end

local function startProject(name, projectType)
    if (not Aurora.Settings.bUseAuBuildHooks) then
        return
    end

    if (isNoLinkType(projectType)) then
        return
    end

    auFilterForConfigPlatforms(function(config, platform, arch)
        postBuildCommands(name, projectType, config, platform, arch)
    end)
end

return {
    startProject = startProject,
    addDest = addDest
}