-- Dependencies
local Game = require 'utils.game'
local Color = require 'utils.color_presets'
local Server = require 'utils.server'

-- localized functions
local random = math.random
local floor = math.floor
local format = string.format
local match = string.match
local insert = table.insert
local concat = table.concat

-- local constants
local prefix = '## - '
local warning_prefix = '## NOTE ## - '
local minutes_to_ticks = 60 * 60
local hours_to_ticks = 60 * 60 * 60
local ticks_to_minutes = 1 / minutes_to_ticks
local ticks_to_hours = 1 / hours_to_ticks

-- local vars
local Public = {}

--- Takes msg and prints it to all players except provided player
-- @param msg <string|table> table if locale is used
-- @param player <LuaPlayer> the player not to send the message to
-- @param color <table> the color to use for the message, defaults to white
function Public.print_except(msg, player, color)
    if not color then
        color = { color = Color.white }
    end

    for _, p in pairs(game.connected_players) do
        if p ~= player then
            p.print(msg, color)
        end
    end
end

function Public.get_filters(points)
    local filters = {}
    for _, section in pairs(points.sections) do
        for _, filter in pairs(section.filters) do
            if filter and filter.value and filter.value.name then
                filters[#filters + 1] = filter
            end
        end
    end
    return filters
end

function Public.print_to(player_ident, msg, color)
    local player = Public.validate_player(player_ident)
    color = color or Color.yellow

    if player then
        player.print(prefix .. msg, color)
    else
        game.print(prefix .. msg, color)
    end
end

function Public.warning(player_ident, msg, color)
    local player = Public.validate_player(player_ident)
    color = color or Color.comfy

    if player then
        player.print(warning_prefix .. msg, color)
    else
        game.print(warning_prefix .. msg, color)
    end
end

--- Prints a message to all online admins
-- @param msg <string|table> table if locale is used
-- @param source <LuaPlayer|string|nil> string must be the name of a player, nil for server.
function Public.print_admins(msg, source)
    local source_name
    local chat_color
    if source and game.players[source] then
        if type(source) == 'string' then
            source_name = source
            chat_color = game.players[source].chat_color
        else
            source_name = source.name
            chat_color = source.chat_color
        end
    else
        source_name = 'Server'
        chat_color = Color.yellow
    end
    local formatted_msg = prefix .. '(ADMIN) ' .. source_name .. ': ' .. msg
    print(formatted_msg)
    for _, p in pairs(game.connected_players) do
        if p.admin then
            p.print(formatted_msg, chat_color)
        end
    end
end

--- Returns a valid string with the name of the actor of a command.
function Public.get_actor()
    if game.player then
        return game.player.name
    end
    return '<server>'
end

--- Iterates over all connected players
---@param callback function
function Public.iter_connected_players(callback)
    local players = game.connected_players
    for i = 1, #players do
        local player = players[i]
        if player and player.valid then
            callback(player, i)
        end
    end
end

--- Iterates over all connected players
---@param callback function
function Public.iter_fake_connected_players(players, callback)
    for i = 1, #players do
        local player = players[i]
        if player and player.valid then
            callback(player, i)
        end
    end
end

--- Iterates over all players
---@param callback function
function Public.iter_players(callback)
    local players = game.players
    for i = 1, #players do
        local player = players[i]
        if player and player.valid then
            callback(player)
        end
    end
end

function Public.output_message(value, color, player)
    color = color and Color[color] or Color.white

    player = player or game.player

    local message = value and type(value) == 'table' and serpent.block(value) or value or type(value) == 'userdata' and 'Cannot output userdata' or 'Cannot output nil'

    if player then
        player = player and type(player) == 'number' and game.get_player(player) and game.get_player(player).valid or player and player.valid and player or false
        if not player then
            error('Given player is not valid.', 2)
        end

        player.play_sound { path = 'utility/scenario_message' }
        player.print(message, color)
    else
        Server.output_script_data(message)
    end
end

function Public.cast_bool(var)
    if var then
        return true
    else
        return false
    end
end

function Public.find_entities_by_last_user(player, surface, filters)
    if type(player) == 'string' or not player then
        error("bad argument #1 to '" .. debug.getinfo(1, 'n').name .. "' (number or LuaPlayer expected, got " .. type(player) .. ')', 1)
        return
    end
    if type(surface) ~= 'table' and type(surface) ~= 'number' then
        error("bad argument #2 to '" .. debug.getinfo(1, 'n').name .. "' (number or LuaSurface expected, got " .. type(surface) .. ')', 1)
        return
    end
    local entities = {}
    local filter = filters or {}
    if type(surface) == 'number' then
        surface = game.surfaces[surface]
    end
    if type(player) == 'number' then
        player = game.get_player(player)
    end
    filter.force = player.force.name
    for _, e in pairs(surface.find_entities_filtered(filter)) do
        if e.last_user == player then
            insert(entities, e)
        end
    end
    return entities
end

function Public.ternary(c, t, f)
    if c then
        return t
    else
        return f
    end
end

--- Takes a time in ticks and returns a string with the time in format "x hour(s) x minute(s)"
function Public.format_time(ticks)
    local result = {}

    local hours = floor(ticks * ticks_to_hours)
    if hours > 0 then
        ticks = ticks - hours * hours_to_ticks
        insert(result, hours)
        if hours == 1 then
            insert(result, 'hour')
        else
            insert(result, 'hours')
        end
    end

    local minutes = floor(ticks * ticks_to_minutes)
    insert(result, minutes)
    if minutes == 1 then
        insert(result, 'minute')
    else
        insert(result, 'minutes')
    end

    return concat(result, ' ')
end

--- Takes a time and returns it in days, hours, minutes etc.
function Public.get_formatted_playtime(ticks)
    if ticks < 5184000 then
        local y = ticks / 216000
        y = tostring(y)
        local h = ''
        for i = 1, 10, 1 do
            local z = string.sub(y, i, i)

            if z == '.' then
                break
            else
                h = h .. z
            end
        end

        local m = ticks % 216000
        m = m / 3600
        m = floor(m)
        m = tostring(m)

        if h == '0' then
            local str = m .. ' minutes'
            return str
        else
            local str = h .. ' hours '
            str = str .. m
            str = str .. ' minutes'
            return str
        end
    else
        local y = ticks / 5184000
        y = tostring(y)
        local h = ''
        for i = 1, 10, 1 do
            local z = string.sub(y, i, i)

            if z == '.' then
                break
            else
                h = h .. z
            end
        end

        local m = ticks % 5184000
        m = m / 216000
        m = floor(m)
        m = tostring(m)

        if h == '0' then
            local str = m .. ' days'
            return str
        else
            local str = h .. ' days '
            str = str .. m
            str = str .. ' hours'
            return str
        end
    end
end

--- Prints a message letting the player know they cannot run a command
-- @param name string name of the command
function Public.cant_run(name)
    Game.player_print("Can't run command (" .. name .. ') - insufficient permission.')
end

--- Logs the use of a command and its user
-- @param actor string with the actor's name (usually acquired by calling get_actor)
-- @param command the command's name as table element
-- @param parameters the command's parameters as a table (optional)
function Public.log_command(actor, command, parameters)
    local action = concat { '[Admin-Command] ', actor, ' used: ', command }
    if parameters then
        action = concat { action, ' ', parameters }
    end
    print(action)
end

function Public.comma_value(n) -- credit http://richard.warburton.it
    local left, num, right = match(n, '^([^%d]*%d)(%d*)(.-)$')
    return left .. (num:reverse():gsub('(%d%d%d)', '%1,'):reverse()) .. right
end

--- Asserts the argument is one of type arg_types
-- @param arg the variable to check
-- @param arg_types the type as a table of sings
-- @return boolean
function Public.verify_mult_types(arg, arg_types)
    for _, arg_type in pairs(arg_types) do
        if type(arg) == arg_type then
            return true
        end
    end
    return false
end

--- Returns a random RGB color as a table
function Public.random_RGB()
    return { r = random(0, 255), g = random(0, 255), b = random(0, 255) }
end

--- Sets a table element to value while also returning value.
-- @param tbl table to change the element of
-- @param key string
-- @param value nil|boolean|number|string|table to set the element to
-- @return value
function Public.set_and_return(tbl, key, value)
    tbl[key] = value
    return value
end

--- Takes msg and prints it to all players. Also prints to the log and discord
-- @param msg <string> The message to print
-- @param warning_prefixes <string> The name of the module/warning
function Public.action_warning(warning_prefixes, msg)
    game.print(prefix .. msg, { color = Color.yellow })
    msg = format('%s %s', warning_prefixes, msg)
    print(msg)
    Server.to_discord_bold(msg)
end

--- Takes msg and prints it to all admin players
-- @param msg <string> The message to print
function Public.action_notify_admins(msg)
    for _, p in pairs(game.connected_players) do
        if p.admin then
            p.print(msg, { color = Color.yellow })
        end
    end
    print(msg)
end

--- Takes msg and prints it to all players. Also prints to the log and discord
-- @param msg <string> The message to print
-- @param warning_prefixes <string> The name of the module/warning
function Public.action_warning_embed(warning_prefixes, msg)
    game.print(prefix .. msg, { color = Color.yellow })
    msg = format('%s %s', warning_prefixes, msg)
    print(msg)
    Server.to_discord_embed(msg)
end

--- Takes msg and prints it to the log and discord.
-- @param msg <string> The message to print
-- @param warning_prefixes <string> The name of the module/warning
function Public.action_to_discord(warning_prefixes, msg)
    msg = format('%s %s', warning_prefixes, msg)
    print(msg)
    Server.to_discord_bold(msg)
end

--- Takes msg and prints it to all players except provided player. Also prints to the log and discord
-- @param msg <string> The message to print
-- @param warning_prefixes <string> The name of the module/warning
-- @param player <LuaPlayer> the player not to send the message to
function Public.silent_action_warning(warning_prefixes, msg, player)
    Public.print_except(prefix .. msg, player, { color = Color.yellow })
    msg = format('%s %s', warning_prefixes, msg)
    print(msg)
    Server.to_discord_bold(msg)
end

--- Takes msg and logs it.
-- @param msg <string> The message to print
-- @param warning_prefixes <string> The name of the module/warning
function Public.log_msg(warning_prefixes, msg)
    msg = format('%s %s', warning_prefixes, msg)
    print(msg)
end

--- Takes a string, number, or LuaPlayer and returns a valid LuaPlayer or nil.
-- Intended for commands as there are extra checks in place.
-- @param <string|number|LuaPlayer>
-- @param <boolean>
-- @return <LuaPlayer|nil> <string|nil> <number|nil> the LuaPlayer, their name, and their index
function Public.validate_player(player_ident, check_admin)
    local data_type = type(player_ident)
    local player

    if data_type == 'userdata' and player_ident.valid then
        local is_player = player_ident.is_player()
        if is_player then
            player = player_ident
        end
    elseif data_type == 'number' or data_type == 'string' then
        player = game.get_player(player_ident)
    else
        return
    end

    if not player or not player.valid then
        return
    end

    if check_admin then
        if not player.admin then
            return
        end
    end

    return player, player.name, player.index
end

--- Logs a flat table with the given label
---@param tbl table
function Public.log_flat(tbl)
    local label = 'Flat table'
    if type(tbl) ~= "table" then
        log(label and (label .. ": " .. tostring(tbl)) or tostring(tbl))
        return
    end

    local flat = {}
    for k, v in pairs(tbl) do
        local vt = type(v)
        if vt == "table" then
            flat[k] = "[table]"
        elseif vt == "function" then
            flat[k] = "[function]"
        elseif vt == "userdata" then
            flat[k] = "[userdata]"
        else
            flat[k] = v
        end
    end

    local msg = (label and (label .. ": ") or "") .. serpent.block(flat, { comment = false, numformat = "%g" })
    log(msg)
end

-- add utility functions that exist in base factorio/util
require 'util'

--- Moves a position according to the parameters given
-- Notice: only accepts cardinal directions as direction
-- @param position <table> table containing a map position
-- @param direction <defines.direction> north, east, south, west
-- @param distance <number>
-- @return <table> modified position
Public.move_position = util.moveposition

--- Takes a direction and gives you the opposite
-- @param direction <defines.direction> north, east, south, west, northeast, northwest, southeast, southwest
-- @return <number> representing the direction
Public.opposite_direction = util.oppositedirection

--- Takes the string of a module and returns whether is it available or not
-- @param name <string> the name of the module (ex. 'utils.core')
-- @return <boolean>
Public.is_module_available = util.ismoduleavailable

Public.log = Public.log_flat

return Public
