-- --------------------------------------------------------------------------------------

local ffi       = require("ffi")

local dirtools  = require("tools.dirtools")
local sapp      = require("sokol_app")
sg              = require("sokol_nuklear")
local nk        = sg
local slib      = require("sokol_libs") -- Warn - always after gfx!!

-- --------------------------------------------------------------------------------------

local settings  = require("config.settings")
local wdgts     = require("utils.widgets")
local fonts     = require("utils.fonts")
local fsel      = require("ui.file_selector")

local icons     = ffi.new("struct nk_image [?]", 10)

local themes    = require("lua.themes")
local logging   = require("utils.logging")

local build     = require("ui.panels_build")
local assets    = require("ui.panels_assets")

-- --------------------------------------------------------------------------------------

local panel     = {
    config          = nil,
    current_path    = ".",

    build           = build,
    assets          = assets,
}

-- --------------------------------------------------------------------------------------
-- Static vars 
-- 
--  Note: Many vars are locally set or globals. This was from a direct C conversion. 
--        To make static vars workaround then place them below.

local winrect       = ffi.new("struct nk_rect[1]", {{10, 25, 1000, 600}})

-- --------------------------------------------------------------------------------------

local myfonts   = nil
local font_list = {
    { font_file = "fontawesome-webfont.ttf", font_size = 16.0, range = nk.nk_font_awesome_glyph_ranges() },
    { font_file = "Rubik-Light.ttf", font_size = 16.0 },
    { font_file = "Rubik-Regular.ttf", font_size = 20.0 },
    { font_file = "Rubik-Bold.ttf", font_size = 21.0 },
}

local folder_select = nil
local file_select = nil
local recent_files = nil

-- --------------------------------------------------------------------------------------
-- Extract config and build ffi objects for them 
--   Each config property shall have a shadow ffi property labeled with _ffi

local function setup_config()
    
    for sectionname, section in pairs(panel.config) do

        for key, prop in pairs(section) do
            -- If ptype is nill or string its a string
            if(prop.ptype == "string") then
                prop.ffi = ffi.new("char[?]", prop.slen )
                ffi.fill(prop.ffi, prop.slen, 0)
                ffi.copy(prop.ffi, ffi.string(prop.value))
                prop.len_ffi = ffi.new("int[1]", {string.len(prop.value)})
            elseif(prop.ptype == "combo") then
                prop.ffi = ffi.new("int[1]", {prop.value})
            elseif(prop.ptype == "check") then
                prop.ffi = ffi.new("bool[1]", {prop.value})
            elseif(prop.ptype == "int") then
                prop.ffi = ffi.new("int[1]", {prop.value})
            elseif(prop.ptype == "float") then
                prop.ffi = ffi.new("float[1]", {prop.value})
            elseif(prop.ptype == "path") then
                prop.ffi = ffi.new("char[?]", prop.slen )
                ffi.fill(prop.ffi, prop.slen, 0)
                ffi.copy(prop.ffi, ffi.string(prop.value))
                prop.len_ffi = ffi.new("int[1]", {string.len(prop.value)})
            elseif(prop.ptype == "file") then
                prop.ffi = ffi.new("char[?]", prop.slen )
                ffi.fill(prop.ffi, prop.slen, 0)
                ffi.copy(prop.ffi, ffi.string(prop.value))
                prop.len_ffi = ffi.new("int[1]", {string.len(prop.value)})
            end
        end
    end

    assets.config = panel.config
    assets.folder_select = folder_select
    assets.file_select = file_select
    build.config = panel.config
    build.folder_select = folder_select
    build.file_select = file_select
end 

-- --------------------------------------------------------------------------------------
local pix = {}

panel.init = function()

    local base_path = "./"
    pix["baboon"] = wdgts.icon_load(base_path.."images/baboon.png")
    -- pix["copy"] = icon_load(base_path.."icon/copy.png")
    -- pix["del"] = icon_load(base_path.."icon/delete.png")
    -- pix["rocket"] = icon_load(base_path.."icon/rocket.png")
    -- pix["edit"] = icon_load(base_path.."icon/edit.png")

    winrect[0].x = 0 
    winrect[0].y = 0
    winrect[0].w = sapp.sapp_width()
    winrect[0].h = sapp.sapp_height()

    icons[0] = wdgts.icon_load("./icon/home.png")
    icons[1] = wdgts.icon_load("./icon/phone.png")
    icons[2] = wdgts.icon_load("./icon/plane.png")
    icons[3] = wdgts.icon_load("./icon/wifi.png")
    icons[4] = wdgts.icon_load("./icon/settings.png")
    icons[5] = wdgts.icon_load("./icon/volume.png")   

    local popup_wide = sapp.sapp_width()* 0.4
    local popup_high = sapp.sapp_height()* 0.7

    local dim = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
        sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)
    folder_select = fsel.create_file_selector("Select Folder", dim, ".", true)

    local dim2 = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
        sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)
    file_select = fsel.create_file_selector("Select File", dim2, ".")

    panel.config = settings.load()
    setup_config()

    settings.load_recents()
    popup_wide = sapp.sapp_width()* 0.8
    local dim3 = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
        sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)    
    recent_files = fsel.create_file_list("Choose Recent", dim3, {})
end

-- --------------------------------------------------------------------------------------

panel.show_recents = function(ctx)

    panel.recent_list = {}
    for i,v in ipairs(settings.recents) do 
        local newfile = { name = ffi.string(v) }
        newfile.select = ffi.new("int[1]")
        newfile.select[0] = 0
        table.insert(panel.recent_list, newfile)
    end
    recent_files.recent_files = panel.recent_list
    fsel.show(recent_files, function(udata, res)
        if(res == true) then 
            panel.current_path = udata.file_selected
            panel.config = settings.load(udata.file_selected)
            setup_config()
            settings.add_recents(udata.file_selected)
        end
    end)
end

-- --------------------------------------------------------------------------------------

panel.main_ui = function(ctx)

    if(myfonts == nil) then 
        myfonts = fonts.setup_font(ctx, font_list)
        wdgts.myfonts = myfonts
        themes.tech(ctx)

        assets.font = myfonts 
        build.font = myfonts
    end

    wdgts.widget_panel_fixed(ctx, "WinMain", 0, 0, sapp.sapp_width(), sapp.sapp_height(), 0, function(data)

        panel.build.active = wdgts.widget_popup_panel(ctx, "popup_build", folder_select.popup_dim, panel.build.ui_func, panel.build, panel.build.active)
        folder_select.popup_active = wdgts.widget_popup_panel(ctx, "popup_folder", folder_select.popup_dim, folder_select.ui_func, folder_select, folder_select.popup_active)
        file_select.popup_active = wdgts.widget_popup_panel(ctx, "popup_fileselect", file_select.popup_dim, file_select.ui_func, file_select, file_select.popup_active)
        recent_files.popup_active = wdgts.widget_popup_panel(ctx, "popup_recentfiles", recent_files.popup_dim, recent_files.ui_func, recent_files, recent_files.popup_active)

        -- /* menubar */
        local menu_states = { MENU_DEFAULT = 0, MENU_WINDOWS = 1}
        nk.nk_menubar_begin(ctx)

        -- /* menu #1 */
        nk.nk_layout_row_begin(ctx, nk.NK_STATIC, 25, 2)
        nk.nk_layout_row_push(ctx, 140)
        if (nk.nk_menu_begin_label(ctx, "File", nk.NK_TEXT_LEFT, nk.nk_vec2(150, 240))) then 
        
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "New", nk.NK_TEXT_LEFT)== true) then
                panel.newconfig()
            end

            nk.nk_layout_row_dynamic(ctx, 3, 1)
            nk.nk_menu_item_label(ctx, "------------", nk.NK_TEXT_LEFT)

            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Open", nk.NK_TEXT_LEFT)== true) then 
                panel.loadconfig()
            end

            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if(nk.nk_menu_item_label(ctx, "Open Recent", nk.NK_TEXT_LEFT) == true) then 
                panel.show_recents()
            end

            nk.nk_layout_row_dynamic(ctx, 3, 1)
            nk.nk_menu_item_label(ctx, "------------", nk.NK_TEXT_LEFT)

            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Save", nk.NK_TEXT_LEFT)== true) then 
                panel.saveconfig()
            end
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "SaveAs", nk.NK_TEXT_LEFT)== true) then 
                panel.saveconfig(true)
            end

            nk.nk_layout_row_dynamic(ctx, 3, 1)
            nk.nk_menu_item_label(ctx, "------------", nk.NK_TEXT_LEFT)

            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Quit", nk.NK_TEXT_LEFT)) then 
                sapp.sapp_request_quit()
            end
            nk.nk_menu_end(ctx)
        end

        -- /* menu #2 */
        nk.nk_layout_row_push(ctx, 60)
        if (nk.nk_menu_begin_label(ctx, "Tools", nk.NK_TEXT_LEFT, nk.nk_vec2(200, 200))) then 
        
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Build", nk.NK_TEXT_LEFT)) then 
            end
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Build All", nk.NK_TEXT_LEFT)) then 
            end
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Clean All", nk.NK_TEXT_LEFT)) then 
            end
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Test Build", nk.NK_TEXT_LEFT)) then 
            end
            nk.nk_layout_row_dynamic(ctx, 35, 1)
            if (nk.nk_menu_item_label(ctx, "Profile", nk.NK_TEXT_LEFT)) then 
            end
            nk.nk_menu_end(ctx)
        end
        nk.nk_menubar_end(ctx)        
    
        nk.nk_layout_row_begin(ctx, nk.NK_STATIC, 15, 1)
        nk.nk_layout_row_push(ctx, 140)

        nk.nk_style_set_font(ctx, myfonts[4].handle)

        local flags = nk.NK_WINDOW_BORDER
        local height = sapp.sapp_height()
        nk.nk_layout_row_dynamic(ctx, height-20, 2)

        if (nk.nk_group_begin(ctx, "Settings", flags) == true) then

            local padding = ctx[0].style.window.padding
            ctx[0].style.window.padding = nk.nk_vec2(10,10)
    
            build.panel(data.ctx)
            if(build.run_config) then setup_config() end
            nk.nk_group_end(ctx)
        end

        nk.nk_style_set_font(ctx, myfonts[4].handle)

        if (nk.nk_group_begin(ctx, "Assets", flags) == true) then           
    
            assets.panel(data.ctx)
        nk.nk_group_end(ctx)
        end

    end, {ctx=ctx})

    -- return not nk.nk_window_is_closed(ctx, "Overview")
end

-- --------------------------------------------------------------------------------------

panel.input = function(event)

    if(event.type == sapp.SAPP_EVENTTYPE_RESIZED) then 

        local popup_wide = sapp.sapp_width()* 0.4
        local popup_high = sapp.sapp_height()* 0.7

        local dim = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
        sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)
        folder_select.popup_dim = dim

        local dim2 = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
            sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)
        file_select.popup_dim = dim2

        popup_wide = sapp.sapp_width()* 0.8
        local dim3 = nk.nk_rect( sapp.sapp_width()/2-8 - popup_wide/2,
        sapp.sapp_height()/2-40 - popup_high/2, popup_wide, popup_high)    
        recent_files.popup_dim = dim3
    end
end

-- --------------------------------------------------------------------------------------

panel.newconfig = function()

    panel.config = settings.load(nil)
    setup_config()
end 

-- --------------------------------------------------------------------------------------

panel.loadconfig = function()

    fsel.open(file_select, ".", nil, 
        function(udata, res) 
            if(res == true) then
                local name=ffi.string(udata.file_selected)
                panel.current_path = name
                logging.info(" panel.loadconfig: Loaded path - "..name)
                panel.config = settings.load(name)
                setup_config()
                settings.add_recents(name)
            end 
        end)
end

-- --------------------------------------------------------------------------------------

panel.saveconfig = function(saveas)

    local init_path = panel.current_path or "."
    print("Init Path: "..panel.current_path)

    if(saveas) then 
        fsel.open(file_select, init_path, nil, 
            function(udata, res) 
                if(res == true) then
                    local name=ffi.string(udata.file_selected)
                    logging.info(" panel.saveconfig: Saved path - "..name)
                    settings.save(name)
                end 
            end)
    else 
        settings.save(panel.current_path)
        logging.info(" panel.saveconfig: Saved path - "..panel.current_path)
    end
end

-- --------------------------------------------------------------------------------------

panel.cleanup = function()

    settings.save_recents()
    logging.cleanup()
end

-- --------------------------------------------------------------------------------------

return panel

-- --------------------------------------------------------------------------------------