-------------------------------------------------------------------------------
-- Premade Groups Filter
-------------------------------------------------------------------------------
-- Copyright (C) 2025 Bernhard Saumweber
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation; either version 2 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License along
-- with this program; if not, write to the Free Software Foundation, Inc.,
-- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-------------------------------------------------------------------------------

local PGF = select(2, ...)
local L = PGF.L
local C = PGF.C

function PGF.UI_SetupCheckBox(panel, field, keyword, size)
    local title = L["dialog."..keyword]
    field.Title:SetText(title)
    field.Act:SetScript("OnClick", function(element)
        panel.state[keyword] = element:GetChecked()
        panel:TriggerFilterExpressionChange()
    end)
    if size then
        field:SetWidth(size)
    end
    local tooltip = L["dialog."..keyword..".tooltip"]
    if tooltip then
        field:SetScript("OnEnter", function (self)
            GameTooltip:SetOwner(self, "ANCHOR_RIGHT")
            GameTooltip:SetText(title, nil, nil, nil, nil, true)
            GameTooltip:AddLine(tooltip, 1, 1, 1, 1, true)
            GameTooltip:Show()
        end)
        field:SetScript("OnLeave", function(self)
            GameTooltip:Hide()
        end)
    end
end

function PGF.UI_SetupMinMaxField(panel, field, keyword, size)
    if not size then size = 290 end
    local title = L["dialog."..keyword]
    field:SetWidth(size)
    field.Title:SetText(title)
    field.Title:SetWidth(size - 155)
    field.To:SetText(L["dialog.to"])

    -- check box
    field.Act:SetScript("OnClick", function(element)
        panel.state[keyword].act = element:GetChecked()
        panel:TriggerFilterExpressionChange()
    end)

    -- text change
    local autoCheckbox = function ()
        local shouldCheck = PGF.NotEmpty(field.Min:GetText()) or PGF.NotEmpty(field.Max:GetText())
        field.Act:SetChecked(shouldCheck)
        panel.state[keyword].act = shouldCheck
    end
    field.Min:SetScript("OnTextChanged", function(element)
        autoCheckbox()
        panel.state[keyword].min = element:GetText()
        panel:TriggerFilterExpressionChange()
    end)
    field.Max:SetScript("OnTextChanged", function(element)
        autoCheckbox()
        panel.state[keyword].max = element:GetText()
        panel:TriggerFilterExpressionChange()
    end)

    -- tabbing
    field.Min:SetScript("OnTabPressed", function(element)
        field.Max:SetFocus()
    end)
    field.Max:SetScript("OnTabPressed", function(element)
        field.Min:SetFocus()
    end)

    -- tooltip
    local tooltip = L["dialog."..keyword..".tooltip"]
    if tooltip then
        field:SetScript("OnEnter", function (self)
            GameTooltip:SetOwner(self, "ANCHOR_RIGHT")
            GameTooltip:SetText(title:gsub("%.+$", ""), nil, nil, nil, nil, true)
            GameTooltip:AddLine(tooltip, 1, 1, 1, 1, true)
            GameTooltip:Show()
        end)
        field:SetScript("OnLeave", function(self)
            GameTooltip:Hide()
        end)
    end
end

function PGF.UI_SetupDropDown(panel, field, name, title, entryTable, size)
    if not size then size = 290 end
    field:SetWidth(size)
    field.DropDown.SetKey = function(self, key)
        for _, v in ipairs(entryTable) do
            if v.key == key then
                self.Text:SetText(v.title)
                break
            end
        end
    end
    field.Title:SetText(title)
    field.Title:SetWidth(size - 155)
    field.Act:SetScript("OnClick", function(element)
        panel.state.difficulty.act = element:GetChecked()
        panel:TriggerFilterExpressionChange()
    end)
    local onDifficultyChanged = function (item)
        field.Act:SetChecked(true)
        field.DropDown.Text:SetText(item.title)
        panel.state.difficulty.act = true
        panel.state.difficulty.val = item.value
        panel:TriggerFilterExpressionChange()
    end
    local dropdown = field.DropDown
    local entries = {}
    for _, v in ipairs(entryTable) do
        table.insert(entries, {
            value = v.key,
            title = v.title,
            func = onDifficultyChanged
        })
    end
    PGF.PopupMenu_Register(name, entries, field:GetParent(), "TOPRIGHT", dropdown, "BOTTOMRIGHT", -15, 10, 95, 150)
    dropdown.Button:SetScript("OnClick", function () PGF.PopupMenu_Toggle(name) end)
    dropdown:SetScript("OnHide", PGF.PopupMenu_Hide)
end


local advancedExpressionPanels = {}

function PGF.UI_SetupAdvancedExpression(panel)
    table.insert(advancedExpressionPanels, panel)
    InputScrollFrame_OnLoad(panel.Advanced.Expression)
    panel.Advanced.Title:SetText(L["dialog.filters.advanced"])
    local fontFile, _, fontFlags = panel.Advanced.Title:GetFont()
    panel.Advanced.Expression.EditBox:SetFont(fontFile, C.FONTSIZE_TEXTBOX, fontFlags)
    panel.Advanced.Expression.EditBox.Instructions:SetFont(fontFile, C.FONTSIZE_TEXTBOX, fontFlags)
    panel.Advanced.Expression.EditBox:SetScript("OnTextChanged", InputScrollFrame_OnTextChanged)
    panel.Advanced.Expression.EditBox:SetScript("OnEscapePressed", InputScrollFrame_OnEscapePressed)
    panel.Advanced.Expression.EditBox:SetScript("OnEditFocusLost", function (self)
        panel.state.expression = self:GetText() or ""
        panel:TriggerFilterExpressionChange()
    end)
    panel.Advanced.Info:SetScript("OnEnter", PGF.Dialog_InfoButton_OnEnter)
    panel.Advanced.Info:SetScript("OnLeave", PGF.Dialog_InfoButton_OnLeave)
    panel.Advanced.Info:SetScript("OnClick", PGF.Dialog_InfoButton_OnClick)
end

--- Removes all comment lines (--), trims each line and joins them to one single line
function PGF.UI_NormalizeExpression(exp)
    if not exp or exp == "" then
        return ""
    end

    local result = ""
    for line in exp:gmatch("([^\n]+)") do -- split by newline and skip empty lines
        if not line:match("^%s*%-%-") then -- if not comment line
            result = result .. " " .. strtrim(line)
        end
    end

    return strtrim(result)
end
