local lang = require 'lang'
local pairs = pairs
local type = type
local w2l

local function has_slk(w2l)
    for _, name in ipairs(w2l.info.txt) do
        if w2l:file_load('map', name) then
            return true
        end
    end
    for _, slks in pairs(w2l.info.slk) do
        for _, name in ipairs(slks) do
            if w2l:file_load('map', name) then
                return true
            end
        end
    end
    if w2l:file_load('map', 'war3mapmisc.txt') then
        return true
    end
    return false
end

local function load_slk(w2l)
    if w2l.force_slk then
        w2l.messager.report(lang.report.OTHER, 9, lang.report.FORCE_READ_SLK)
    end
    if (w2l.force_slk or w2l.setting.read_slk) and has_slk(w2l) then
        return w2l:frontend_buildslk(true)
    else
        return w2l:get_default(true)
    end
end

local function load_obj(w2l, wts)
    local objs = {}
    local count = 0
    for _, type in ipairs {'ability', 'buff', 'unit', 'item', 'upgrade', 'doodad', 'destructable', 'misc'} do
        local name = w2l.info.obj[type]
        local buf = w2l:file_load('map', name)
        local count = count + 1
        if buf then
            w2l.messager.text(lang.script.CONVERT_ONE .. name)
            objs[type] = w2l:frontend_obj(type, buf, wts)
            w2l.progress(count / 8)
        end
    end
    return objs
end

local function load_lni(w2l)
    local lnis = {}
    local count = 0
    for type, name in pairs(w2l.info.lni) do
        count = count + 1
        local buf = w2l:file_load('table', type)
        if buf then
            w2l.messager.text(lang.script.CONVERT_ONE .. type)
            lnis[type] = w2l:frontend_lni(type, buf, type)
            w2l.progress(count / 8)
        end
    end

    local buf = w2l:file_load('table', 'txt')
    if buf then
        lnis['txt'] = w2l:parse_lni(buf, 'txt')
    end
    return lnis
end

local function load_w3i(w2l, slk)
    local buf = w2l:file_load('table', 'w3i')
    if buf then
        return w2l:parse_lni(buf, 'w3i')
    else
        buf = w2l:file_load('map', 'war3map.w3i')
        if buf then
            return w2l:frontend_w3i(buf, slk.wts)
        end
    end
    return nil
end

local function update_version(w2l, w3i)
    if not w3i then
        return
    end
    local melee = w3i[lang.w3i.CONFIG][lang.w3i.MELEE_MAP]
    local set   = w3i[lang.w3i.CONFIG][lang.w3i.GAME_DATA_SETTING]
    if set == -1 or set == 0 then
        if melee == 0 then
            w2l.setting.version = 'Custom'
        elseif melee == 1 then
            w2l.setting.version = 'Melee'
        end
    elseif set == 1 then
        w2l.setting.version = 'Custom'
    elseif set == 2 then
        w2l.setting.version = 'Melee'
    end
    w2l:set_setting(w2l.setting)
end

local function mark_keep_obj_before_merge(type, objs)
    if type == 'ability' then
        for id, obj in pairs(objs) do
            for k in pairs(obj) do
                if k:sub(1, 1) ~= '_' then
                    goto CONTINUE
                end
            end
            obj._keep_obj = true
            w2l.messager.report(lang.report.INVALID_OBJECT, 6, lang.report.ABILITY_REMOVED:format(id), lang.report.ABILITY_REMOVED_HINT)
            ::CONTINUE::
        end
    end
end

local function mark_keep_obj_after_merge(type, objs)
    local used = {}
    for id, obj in pairs(objs) do
        local lid = id:lower()
        if used[lid] then
            obj._keep_obj = true
            objs[used[lid]]._keep_obj = true
            local _, _, name1 = w2l:get_displayname(obj)
            local _, _, name2 = w2l:get_displayname(objs[used[lid]])
            w2l.messager.report(lang.report.WARN, 2, (lang.report.OBJECT_ID_CONFLICT):format(id), ('`%s`[%s] --> `%s`[%s]'):format(id, name1, used[lid], name2))
        else
            used[lid] = id
        end
    end
end

local function update_then_merge(w2l, slks, objs, lnis, slk)
    for _, type in ipairs {'ability', 'buff', 'unit', 'item', 'upgrade', 'doodad', 'destructable', 'misc', 'txt'} do
        local report, report2
        local data = slks[type]
        local obj = objs[type]
        if obj then
            if type ~= 'misc' then
                report, report2 = w2l:frontend_updateobj(type, obj, data)
            end
        else
            obj = {}
        end
        if lnis[type] then
            w2l:frontend_updatelni(type, lnis[type], data)
            for k, v in pairs(lnis[type]) do
                obj[k] = v
            end
        end
        if w2l.setting.mode == 'slk' then
            mark_keep_obj_before_merge(type, obj)
        end
        slk[type] = w2l:frontend_merge(type, data, obj)
        if w2l.setting.mode == 'slk' then
            mark_keep_obj_after_merge(type, slk[type])
        end
        if report then
            for i = 1, 10 do
                local data = report[i]
                if not data then
                    break
                end
                w2l.messager.report(lang.report.INVALID_OBJECT_DATA, 6, ('%s %s %s'):format(w2l:get_displayname(slk[type][data[1]])), ('[%s]: %s'):format(data[2], data[3]))
            end
        end
        if report2 then
            for i = 1, 10 do
                if not report2[i] then
                    break
                end
                w2l.messager.report(lang.report.INVALID_OBJECT_DATA, 6, report2[i][1], report2[i][2])
            end
        end
    end
end

return function(w2l_, slk)
    w2l = w2l_
    slk = slk or {}
    w2l.slk = slk
    --读取字符串
    slk.wts = w2l:frontend_wts(w2l:file_load('map', 'war3map.wts'))
    w2l.progress(0.2)

    slk.w3i = load_w3i(w2l, slk)
    update_version(w2l, slk.w3i)

    w2l.messager.text(lang.script.LOAD_OBJ)
    w2l.progress:start(0.4)
    local objs = load_obj(w2l, slk.wts)
    w2l.progress:finish()

    w2l.messager.text(lang.script.LOAD_LNI)
    w2l.progress:start(0.6)
    local lnis = load_lni(w2l)
    w2l.progress:finish()

    w2l.messager.text(lang.script.LOAD_SLK)
    w2l.progress:start(0.8)
    local slks = load_slk(w2l)
    w2l.progress:finish()
    
    w2l.messager.text(lang.script.MERGE_OBJECT)
    w2l.progress:start(1)
    update_then_merge(w2l, slks, objs, lnis, slk)
    w2l.progress:finish()
    
    w2l.messager.text(lang.script.DO_PLUGIN)
    w2l:call_plugin('on_full')

    if w2l.setting.extra_check then
        w2l:frontend_extracheck(slk)
    end
end
