--[[-- Control Module - Warnings
    - Adds a way to give and remove warnings to players.
    @module Warnings
    @alias Warnings

    @usage
    -- This will add a warning to the player
    Warnings.add_warning('MrBiter','Cooldude2606','Killed too many biters')

    -- This will remove a warning from a player, second name is just who is doing the action
    Warnings.remove_warning('MrBiter','Cooldude2606')

    -- Script warning as similar to normal warning but are designed to have no effect for a short amount of time
    -- this is so it can be used for greifer protection without being too agressive
    Warnings.add_script_warning('MrBiter','Killed too many biters')

    -- Both normal and script warnings can also be cleared, this will remove all warnings
    Warnings.clear_warnings('MrBiter','Cooldude2606')
]]

local Event = require 'utils.event'
local Game = require 'utils.game'
local Global = require 'utils.global'
local config = require 'config.warnings'

local valid_player = Game.get_player_from_any

local Warnings = {
    user_warnings={},
    user_script_warnings={},
    events = {
        --- When a warning is added to a player
        -- @event on_warning_added
        -- @tparam number player_index the index of the player who recived the warning
        -- @tparam string by_player_name the name of the player who gave the warning
        -- @tparam string reason the reason that the player was given a warning
        -- @tparam number warning_count the new number of warnings that the player has
        on_warning_added = script.generate_event_name(),
        --- When a warning is removed from a player
        -- @event on_warning_removed
        -- @tparam number player_index the index of the player who is having the warning removed
        -- @tparam string warning_by_name the name of the player who gave the warning
        -- @tparam string removed_by_name the name of the player who is removing the warning
        -- @tparam number warning_count the new number of warnings that the player has
        on_warning_removed = script.generate_event_name(),
        --- When a warning is added to a player, by the script
        -- @event on_script_warning_added
        -- @tparam number player_index the index of the player who recived the warning
        -- @tparam string reason the reason that the player was given a warning
        -- @tparam number warning_count the new number of warnings that the player has
        on_script_warning_added = script.generate_event_name(),
        --- When a warning is remnoved from a player, by the script
        -- @event on_script_warning_removed
        -- @tparam number player_index the index of the player who is having the warning removed
        -- @tparam number warning_count the new number of warnings that the player has
        on_script_warning_removed = script.generate_event_name(),
    }
}

local user_warnings = Warnings.user_warnings
local user_script_warnings = Warnings.user_script_warnings
Global.register({
    user_warnings = user_warnings,
    user_script_warnings = user_script_warnings
},function(tbl)
    user_warnings = tbl.user_warnings
    user_script_warnings = tbl.user_script_warnings
end)

--- Gets an array of warnings that the player has, always returns a list even if emtpy
-- @tparam LuaPlayer player the player to get the warning for
-- @treturn table an array of all the warnings on this player, contains tick, by_player_name and reason
function Warnings.get_warnings(player)
    return user_warnings[player.name] or {}
end

--- Gets the number of warnings that a player has on them
-- @tparam LuaPlayer player the player to count the warnings for
-- @treturn number the number of warnings that the player has
function Warnings.count_warnings(player)
    local warnings = user_warnings[player.name] or {}
    return #warnings
end

--- Adds a warning to a player, when a warning is added a set action is done based on the number of warnings and the config file
-- @tparam LuaPlayer player the player to add a warning to
-- @tparam string by_player_name the name of the player who is doing the action
-- @tparam[opt='Non given.'] string reason the reason that the player is being warned
-- @treturn number the number of warnings that the player has
function Warnings.add_warning(player,by_player_name,reason)
    player = valid_player(player)
    if not player then return end
    if not by_player_name then return end

    reason = reason or 'Non given.'

    local warnings = user_warnings[player.name]
    if not warnings then
        warnings = {}
        user_warnings[player.name] = warnings
    end

    table.insert(warnings,{
        tick = game.tick,
        by_player_name = by_player_name,
        reason = reason
    })

    local warning_count = #warnings

    script.raise_event(Warnings.on_warning_added,{
        name = Warnings.on_warning_added,
        tick = game.tick,
        player_index = player.index,
        warning_count = warning_count,
        by_player_name = by_player_name,
        reason = reason
    })

    local action = config.actions[#warnings]
    if action then
        local _type = type(action)
        if _type == 'function' then
            action(player,by_player_name,warning_count)
        elseif _type == 'table' then
            local current = table.deepcopy(action)
            table.insert(current,2,by_player_name)
            table.insert(current,3,warning_count)
            player.print(current)
        elseif type(action) == 'string' then
            player.print(action)
        end
    end

    return warning_count
end

--- Event trigger for removing a waring due to it being looped in clear warnings
-- @tparam LuaPlayer player the player who is having a warning removed
-- @tparam string warning_by_name the name of the player who made the warning
-- @tparam string removed_by_name the name of the player who is doing the action
-- @tparam number warning_count the number of warnings that the player how has
local function warning_removed_event(player,warning_by_name,removed_by_name,warning_count)
    script.raise_event(Warnings.on_warning_removed,{
        name = Warnings.on_warning_removed,
        tick = game.tick,
        player_index = player.index,
        warning_count = warning_count,
        warning_by_name = warning_by_name,
        removed_by_name = removed_by_name
    })
end

--- Removes a warning from a player, always removes the earlyist warning, fifo
-- @tparam LuaPlayer player the player to remove a warning from
-- @tparam string by_player_name the name of the player who is doing the action
-- @treturn number the number of warnings that the player has
function Warnings.remove_warning(player,by_player_name)
    player = valid_player(player)
    if not player then return end
    if not by_player_name then return end

    local warnings = user_warnings[player.name]
    if not warnings then return end

    local warning = table.remove(warnings,1)

    warning_removed_event(player,warning.by_player_name,by_player_name,#warnings)

    return #warnings
end

--- Removes all warnings from a player, will trigger remove event for each warning
-- @tparam LuaPlayer player the player to clear the warnings from
-- @tparam string by_player_name the name of the player who is doing the action
-- @treturn boolean true when warnings were cleared succesfully
function Warnings.clear_warnings(player,by_player_name)
    player = valid_player(player)
    if not player then return end
    if not by_player_name then return end

    local warnings = user_warnings[player.name]
    if not warnings then return end

    local warning_count = #warnings
    for n,warning in pairs(warnings) do
        warning_removed_event(player,warning.by_player_name,by_player_name,warning_count-n)
    end

    user_warnings[player.name] = nil
    return true
end

--- Gets an array of all the script warnings that a player has
-- @tparam LuaPlayer player the player to get the script warnings of
-- @treturn table a table of all the script warnings a player has, contains tick and reason
function Warnings.get_script_warnings(player)
    return user_script_warnings[player.name] or {}
end

--- Gets the number of script warnings that a player has on them
-- @tparam LuaPlayer player the player to count the script warnings of
-- @treturn number the number of script warnings that the player has
function Warnings.count_script_warnings(player)
    local warnings = user_script_warnings[player.name] or {}
    return #warnings
end

--- Adds a script warning to a player, this may add a full warning if max script warnings is met
-- @tparam LuaPlayer player the player to add a script warning to
-- @tparam[opt='Non given.'] string reason the reason that the player is being warned
-- @treturn number the number of script warnings that the player has
function Warnings.add_script_warning(player,reason)
    player = valid_player(player)
    if not player then return end

    reason = reason or 'Non given.'

    local warnings = user_script_warnings[player.name]
    if not warnings then
        warnings = {}
        user_script_warnings[player.name] = warnings
    end

    table.insert(warnings,{
        tick = game.tick,
        reason = reason
    })

    local warning_count = #warnings

    script.raise_event(Warnings.on_script_warning_added,{
        name = Warnings.on_script_warning_added,
        tick = game.tick,
        player_index = player.index,
        warning_count = warning_count,
        reason = reason
    })

    if warning_count > config.script_warning_limit then
        Warnings.add_warning(player,'<server>',reason)
    end

    return warning_count
end

--- Script warning removed event tigger due to it being looped in clear script warnings
-- @tparam LuaPlayer player the player who is having a script warning removed
-- @tparam number warning_count the number of warning that the player has
local function script_warning_removed_event(player,warning_count)
    script.raise_event(Warnings.on_script_warning_removed,{
        name = Warnings.on_script_warning_removed,
        tick = game.tick,
        player_index = player.index,
        warning_count = warning_count
    })
end

--- Removes a script warning from a player
-- @tparam LuaPlayer player the player to remove a script warning from
-- @treturn number the number of script warnings that the player has
function Warnings.remove_script_warning(player)
    player = valid_player(player)
    if not player then return end

    local warnings = user_script_warnings[player.name]
    if not warnings then return end

    table.remove(warnings,1)

    script_warning_removed_event(player)

    return #warnings
end

--- Removes all script warnings from a player, emits event for each warning removed
-- @tparam LuaPlayer player the player to clear the script warnings from
function Warnings.clear_script_warnings(player)
    player = valid_player(player)
    if not player then return end

    local warnings = user_script_warnings[player.name]
    if not warnings then return end

    local warning_count = #warnings
    for n,_ in pairs(warnings) do
        script_warning_removed_event(player,warning_count-n)
    end

    user_script_warnings[player.name] = nil
    return true
end

-- script warnings are removed after a certain amount of time to make them even more lienient
local script_warning_cool_down = config.script_warning_cool_down*3600
Event.on_nth_tick(script_warning_cool_down/4,function()
    local cutoff = game.tick - script_warning_cool_down
    for player_name,script_warnings in pairs(user_script_warnings) do
        if #script_warnings > 0 then
            for _,warning in pairs(script_warnings) do
                if warning.tick < cutoff then
                    Warnings.remove_script_warning(player_name)
                end
            end
        end
    end
end)

return Warnings