local gui = require('gui')
local function send_keys(...)
    local keys = {...}
    for _,key in ipairs(keys) do
        gui.simulateInput(dfhack.gui.getCurViewscreen(true), key)
    end
end

local xtest = {} -- use to temporarily disable tests (change `function test.somename` to `function xtest.somename`)
local wait = function(n)
    --delay(n or 30) -- enable for debugging the tests
end

local dialogs = require('gui.dialogs')

function test.ListBox_opens_and_closes()
    local before_scr = dfhack.gui.getCurViewscreen(true)
    local choices = {{
        text = 'ListBox_opens_and_closes'
    }}
    local lb = dialogs.ListBox({choices = choices})
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "creating a ListBox object should not change CurViewscreen")
    lb:show()
    wait()
    expect.ne(before_scr, dfhack.gui.getCurViewscreen(true), "ListBox:show should change CurViewscreen")
    send_keys('LEAVESCREEN')
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "Pressing LEAVESCREEN should return us to previous screen")
end

function test.ListBox_closes_on_select()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    local args = {}
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = mock_cb
    args.on_select2 = mock_cb2
    args.choices = {{
        text = 'ListBox_closes_on_select'
    }}

    local lb = dialogs.ListBox(args)
    lb:show()
    wait()
    send_keys('SELECT')

    expect.eq(1, mock_cb.call_count)
    expect.eq(0, mock_cb2.call_count)

    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "Selecting an item should return us to previous screen")
end

function test.ListBox_closes_on_select2()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    local args = {}
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = mock_cb
    args.on_select2 = mock_cb2
    args.choices = {{
        text = 'ListBox_closes_on_select2'
    }}

    local lb = dialogs.ListBox(args)
    lb:show()
    wait()
    send_keys('SEC_SELECT')
    
    expect.eq(0, mock_cb.call_count)
    expect.eq(1, mock_cb2.call_count)

    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "Selecting an item should return us to previous screen")
end

function test.ListBox_stays_open_with_multi_select()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    local args = {}
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = mock_cb
    args.on_select2 = mock_cb2
    args.dismiss_on_select = false
    args.choices = {{
        text = 'ListBox_stays_open_with_multi_select'
    }}

    local lb = dialogs.ListBox(args)
    lb:show()
    local lb_scr = dfhack.gui.getCurViewscreen(true)
    wait()
    send_keys('SELECT')

    expect.eq(lb_scr, dfhack.gui.getCurViewscreen(true), "Selecting an item should NOT close the ListBox")

    send_keys('SEC_SELECT')
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "With default dismiss_on_select2 it should return us to previous screen")
    
    expect.eq(1, mock_cb.call_count)
    expect.eq(1, mock_cb2.call_count)
end

function test.ListBox_stays_open_with_multi_select2()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    local args = {}
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = mock_cb
    args.on_select2 = mock_cb2
    args.dismiss_on_select2 = false
    args.choices = {{
        text = 'ListBox_stays_open_with_multi_select2'
    }}

    local lb = dialogs.ListBox(args)
    lb:show()
    local lb_scr = dfhack.gui.getCurViewscreen(true)
    wait()
    send_keys('SEC_SELECT')

    expect.eq(lb_scr, dfhack.gui.getCurViewscreen(true), "Sec-selecting an item should NOT close the ListBox")

    send_keys('SELECT')
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "With default dismiss_on_select it should return us to previous screen")
    
    expect.eq(1, mock_cb.call_count)
    expect.eq(1, mock_cb2.call_count)
end

function test.ListBox_with_multi_select()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    local args = {}
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = mock_cb
    args.on_select2 = mock_cb2
    args.dismiss_on_select = false
    args.dismiss_on_select2 = false
    args.choices = {{
        text = 'ListBox_with_multi_select'
    },{
        text = 'item2'
    },{
        text = 'item3'
    }
    }

    local lb = dialogs.ListBox(args)
    lb:show()
    local lb_scr = dfhack.gui.getCurViewscreen(true)
    wait()
    send_keys('SELECT')
    send_keys('STANDARDSCROLL_DOWN')
    wait()
    send_keys('SEC_SELECT')
    send_keys('STANDARDSCROLL_DOWN')
    wait()
    send_keys('SELECT')
    
    expect.eq(2, mock_cb.call_count)
    expect.eq(1, mock_cb2.call_count)
    
    expect.eq(lb_scr, dfhack.gui.getCurViewscreen(true), "With both dismiss_on_select and dismiss_on_select2 false the ListBox should stay open")
    
    send_keys('LEAVESCREEN')
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "Pressing LEAVESCREEN should still return us to previous screen")
end

-- this test also demonstrates actual (minimal) example usage
function test.ListBox_with_multi_select_and_visual_indicator()
    local before_scr = dfhack.gui.getCurViewscreen(true)

    -- configure colors
    local pen_active = COLOR_LIGHTCYAN
    local dpen_active = COLOR_CYAN
    local pen_not_active = COLOR_LIGHTRED
    local dpen_not_active = COLOR_RED
    local pen_cb = function(args, fnc)
        if not (args and fnc) then return COLOR_YELLOW end
        return fnc(args) and pen_active or pen_not_active
    end
    local pen_d_cb = function(args, fnc)
        if not (args and fnc) then return COLOR_YELLOW end
        return fnc(args) and dpen_active or dpen_not_active
    end
    
    local args = {}
    local choices = {}
    args.choices = choices
    local mock_cb = mock.func()
    local mock_cb2 = mock.func()
    args.on_select = function(ix, choice)
        mock_cb()
        local item = choice.item
        item.active = not item.active
    end
    args.on_select2 = mock_cb2
    args.dismiss_on_select = false
    
    local mock_is_active_cb_counter = mock.func()
    local is_active = function (args)
        mock_is_active_cb_counter()
        return args.item.active
    end
    local items = {
        {text = 'ListBox_with_multi_select', active = true},
        {text = 'and_visual_indicator', active = true},
        {text = 'item3', active = false}
    }
    for _, item in pairs(items) do
        local args = {item=item}
        table.insert(choices, {
            text = {{text = item.text,
                    pen = curry(pen_cb, args, is_active),
                    dpen = curry(pen_d_cb, args, is_active),
            }},
            item = item
        })
    end

    local lb = dialogs.ListBox(args)
    lb:show()
    local lb_scr = dfhack.gui.getCurViewscreen(true)
    
    expect.eq(pen_active, choices[1].text[1].pen(), "Pen of the first item should be the pen_active")
    expect.eq(pen_not_active, choices[3].text[1].pen(), "Pen of the third item should be the pen_not_active")
    
    wait()
    send_keys('SELECT')
    send_keys('STANDARDSCROLL_DOWN')
    wait()
    send_keys('SELECT')
    send_keys('STANDARDSCROLL_DOWN')
    wait()
    send_keys('SELECT')
    wait(100)
    expect.eq(3, mock_cb.call_count)
    expect.eq(0, mock_cb2.call_count)
    
    expect.lt(0, mock_is_active_cb_counter.call_count, "is_active should be called at least once")
    
    expect.table_eq(
        {
            {text = 'ListBox_with_multi_select', active = false},
            {text = 'and_visual_indicator', active = false},
            {text = 'item3', active = true}
        },
        items,
        "the active status should've been toggled"
    )
    expect.eq(pen_not_active, choices[1].text[1].pen(), "Pen of the first now not active item should be the pen_not_active")
    expect.eq(pen_active, choices[3].text[1].pen(), "Pen of the third now active item should be the pen_active")
    
    expect.eq(lb_scr, dfhack.gui.getCurViewscreen(true), "With both dismiss_on_select and dismiss_on_select2 false the ListBox should stay open")
    
    send_keys('LEAVESCREEN')
    expect.eq(before_scr, dfhack.gui.getCurViewscreen(true), "Pressing LEAVESCREEN should still return us to previous screen")
end
