--!The Make-like Build Utility based on Lua
--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements.  See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership.  The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License.  You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
-- 
-- Copyright (C) 2015 - 2017, TBOOX Open Source Group.
--
-- @author      ruki
-- @file        main.lua
--

-- imports
import("core.base.option")
import("core.project.task")
import("core.project.config")
import("core.project.global")
import("core.project.project")
import("core.platform.platform")

-- remove the given files or directories
function _remove(filedirs)

    -- done
    for _, filedir in ipairs(filedirs) do

        -- remove it first
        os.tryrm(filedir)
 
        -- remove it if the parent directory is empty
        local parentdir = path.directory(filedir)
        while parentdir and os.isdir(parentdir) and os.emptydir(parentdir) do
            os.tryrm(parentdir)
            parentdir = path.directory(parentdir)
        end
    end
end

-- on clean target 
function _on_clean_target(target)

    -- remove the target file 
    _remove(target:targetfile()) 

    -- remove the target arguments file if exists
    _remove(target:targetfile() .. ".arg") 

    -- remove the symbol file 
    _remove(target:symbolfile()) 

    -- remove the object files 
    _remove(target:objectfiles())

    -- remove the incdep files 
    _remove(target:incdepfiles())

    -- remove the header files 
    local _, dstheaders = target:headerfiles()
    _remove(dstheaders) 

    -- remove all?
    if option.get("all") then 

        -- remove the config.h file
        _remove(target:configheader()) 
    end
end

-- clean the given target files
function _clean_target(target)

    -- the target scripts
    local scripts =
    {
        target:get("clean_before")
    ,   target:get("clean") or _on_clean_target
    ,   target:get("clean_after")
    }

    -- run the target scripts
    for i = 1, 3 do
        local script = scripts[i]
        if script ~= nil then
            script(target)
        end
    end

end

-- clean the given target and all dependent targets
function _clean_target_and_deps(target)

    -- this target have been finished?
    if _g.finished[target:name()] then
        return 
    end

    -- remove the target
    _clean_target(target) 
     
    -- exists the dependent targets?
    for _, dep in ipairs(target:get("deps")) do
        _clean_target_and_deps(project.target(dep))
    end

    -- finished
    _g.finished[target:name()] = true
end

-- clean the given target 
function _clean(targetname)

    -- the target name
    if targetname and targetname ~= "all" then

        -- clean target
        _clean_target_and_deps(project.target(targetname)) 

    else

        -- clean targets
        for _, target in pairs(project.targets()) do
            _clean_target_and_deps(target) 
        end
    end

    -- remove all
    if option.get("all") then 

        -- remove the configure directory
        _remove(config.directory())
    end
end

-- main
function main()

    -- get the target name
    local targetname = option.get("target")

    -- config it first
    task.run("config", {target = targetname})

    -- init finished states
    _g.finished = {}

    -- enter project directory
    local olddir = os.cd(project.directory())

    -- clean the current target
    _clean(targetname) 

    -- leave project directory
    os.cd(olddir)
end