--luacheck: ignore
local Public = {}
local Table = require 'modules.towny.table'

local outlander_color = {150, 150, 150}
local outlander_chat_color = {170, 170, 170}
local item_drop_radius = 1.65

local function can_force_accept_member(force)
    local townytable = Table.get_table()
    local town_centers = townytable.town_centers
    local size_of_town_centers = townytable.size_of_town_centers
    local member_limit = 0

    if size_of_town_centers <= 1 then
        return true
    end

    for _, town in pairs(town_centers) do
        member_limit = member_limit + #town.market.force.connected_players
    end
    member_limit = math.floor(member_limit / size_of_town_centers) + 4

    if #force.connected_players >= member_limit then
        game.print({'modules_towny.message_too_many_players', force.name, member_limit}, {255, 255, 0})
        return
    end
    return true
end

function Public.set_player_color(player)
    local townytable = Table.get_table()
    if player.force.index == 1 then
        player.color = outlander_color
        player.chat_color = outlander_chat_color
        return
    end
    local town_center = townytable.town_centers[player.force.name]
    if not town_center then
        return
    end
    player.color = town_center.color
    player.chat_color = town_center.color
end

function Public.set_town_color(event)
    local townytable = Table.get_table()
    if event.command ~= 'color' then
        return
    end
    local player = game.players[event.player_index]
    if player.force.index == 1 then
        player.color = outlander_color
        player.chat_color = outlander_chat_color
        return
    end
    local town_center = townytable.town_centers[player.name]
    if not town_center then
        Public.set_player_color(player)
        return
    end

    town_center.color = {player.color.r, player.color.g, player.color.b}
    rendering.set_color(town_center.town_caption, town_center.color)
    for _, p in pairs(player.force.players) do
        Public.set_player_color(p)
    end
end

function Public.set_all_player_colors()
    for _, p in pairs(game.connected_players) do
        Public.set_player_color(p)
    end
end

function Public.add_player_to_town(player, town_center)
    player.force = town_center.market.force
    game.permissions.get_group('Default').add_player(player)
    player.tag = ''
    Public.set_player_color(player)
end

function Public.give_outlander_items(player)
    player.insert({name = 'stone-furnace', count = 1})
    player.insert({name = 'raw-fish', count = 3})
    player.insert({name = 'coal', count = 3})
end

function Public.set_player_to_outlander(player)
    player.force = game.forces.player
    game.permissions.get_group('outlander').add_player(player)
    player.tag = '[Outlander]'
    Public.set_player_color(player)
end

local function ally_outlander(player, target)
    local townytable = Table.get_table()
    local requesting_force = player.force
    local target_force = target.force

    if requesting_force.index ~= 1 and target_force.index ~= 1 then
        return
    end
    if requesting_force.index == 1 and target_force.index == 1 then
        return true
    end

    if requesting_force.index == 1 then
        townytable.requests[player.index] = target_force.name

        local target_player = false
        if target.type == 'character' then
            target_player = target.player
        else
            target_player = game.players[target_force.name]
        end

        if target_player then
            if townytable.requests[target_player.index] then
                if townytable.requests[target_player.index] == player.name then
                    if townytable.town_centers[target_force.name] then
                        if not can_force_accept_member(target_force) then
                            return true
                        end
                        game.print({'modules_towny.message_settled', player.name, target_force.name}, {255, 255, 0})
                        Public.add_player_to_town(player, townytable.town_centers[target_force.name])
                        return true
                    end
                end
            end
        end

        game.print({'modules_towny.message_settling', player.name, target_force.name}, {255, 255, 0})
        return true
    end

    if target_force.index == 1 then
        if target.type ~= 'character' then
            return true
        end
        local target_player = target.player
        if not target_player then
            return true
        end
        townytable.requests[player.index] = target_player.name

        if townytable.requests[target_player.index] then
            if townytable.requests[target_player.index] == player.force.name then
                if not can_force_accept_member(player.force) then
                    return true
                end
                if player.force.name == player.name then
                    game.print({'modules_towny.message_accepted_own', player.name, target_player.name}, {255, 255, 0})
                else
                    game.print({'modules_towny.message_accepted_own', player.name, target_player.name, player.force.name}, {255, 255, 0})
                end
                Public.add_player_to_town(target_player, townytable.town_centers[player.force.name])
                return true
            end
        end

        if player.force.name == player.name then
            game.print({'modules_towny.message_invite_own', player.name, target_player.name}, {255, 255, 0})
        else
            game.print({'modules_towny.message_invite', player.name, target_player.name, player.force.name}, {255, 255, 0})
        end
        return true
    end
end

local function ally_neighbour_towns(player, target)
    local requesting_force = player.force
    local target_force = target.force

    if target_force.get_friend(requesting_force) and requesting_force.get_friend(target_force) then
        return
    end

    requesting_force.set_friend(target_force, true)
    game.print({'modules_towny.message_friend', requesting_force.name, target_force.name}, {255, 255, 0})

    if target_force.get_friend(requesting_force) then
        game.print({'modules_towny.message_alliance', requesting_force.name, target_force.name}, {255, 255, 0})
    end
end

function Public.ally_town(player, item)
    local position = item.position
    local surface = player.surface
    local area = {{position.x - item_drop_radius, position.y - item_drop_radius}, {position.x + item_drop_radius, position.y + item_drop_radius}}
    local requesting_force = player.force
    local target = false

    for _, e in pairs(surface.find_entities_filtered({type = {'character', 'market'}, area = area})) do
        if e.force.name ~= requesting_force.name then
            target = e
            break
        end
    end

    if not target then
        return
    end
    if target.force.index == 2 or target.force.index == 3 then
        return
    end

    if ally_outlander(player, target) then
        return
    end
    ally_neighbour_towns(player, target)
end

function Public.declare_war(player, item)
    local townytable = Table.get_table()
    local position = item.position
    local surface = player.surface
    local area = {{position.x - item_drop_radius, position.y - item_drop_radius}, {position.x + item_drop_radius, position.y + item_drop_radius}}

    local requesting_force = player.force
    local target = surface.find_entities_filtered({type = {'character', 'market'}, area = area})[1]

    if not target then
        return
    end
    local target_force = target.force
    if target_force.index <= 3 then
        return
    end

    if requesting_force.name == target_force.name then
        if player.name ~= target.force.name then
            Public.set_player_to_outlander(player)
            game.print({'modules_towny.message_abandon', player.name, target_force.name}, {255, 255, 0})
            townytable.requests[player.index] = nil
        end
        if player.name == target.force.name then
            if target.type ~= 'character' then
                return
            end
            local target_player = target.player
            if not target_player then
                return
            end
            if target_player.index == player.index then
                return
            end
            Public.set_player_to_outlander(target_player)
            game.print({'modules_towny.message_banish', player.name, target_player.name}, {255, 255, 0})
            townytable.requests[player.index] = nil
        end
        return
    end

    if requesting_force.index == 1 then
        return
    end

    requesting_force.set_friend(target_force, false)
    target_force.set_friend(requesting_force, false)

    game.print({'modules_towny.message_war', player.name, target_force.name, requesting_force.name}, {255, 255, 0})
end

local radius = 96
function Public.reveal_entity_to_all(entity)
    local chart_area = {{entity.position.x - radius, entity.position.y - radius}, {entity.position.x + radius, entity.position.y + radius}}
    local surface = entity.surface
    for _, force in pairs(game.forces) do
        force.chart(surface, chart_area)
    end
end

local function delete_chart_tag_for_all_forces(market)
    local forces = game.forces
    local position = market.position
    local surface = market.surface
    for _, force in pairs(forces) do
        local tags = force.find_chart_tags(surface, {{position.x - 0.1, position.y - 0.1}, {position.x + 0.1, position.y + 0.1}})
        local tag = tags[1]
        if tag then
            if tag.icon.name == 'stone-furnace' then
                tag.destroy()
            end
        end
    end
end

function Public.add_chart_tag(force, market)
    local position = market.position
    local tags = force.find_chart_tags(market.surface, {{position.x - 0.1, position.y - 0.1}, {position.x + 0.1, position.y + 0.1}})
    if tags[1] then
        return
    end
    force.add_chart_tag(market.surface, {icon = {type = 'item', name = 'stone-furnace'}, position = position, text = market.force.name .. "'s Town"})
end

function Public.update_town_chart_tags()
    local townytable = Table.get_table()
    local town_centers = townytable.town_centers
    local forces = game.forces
    for _, town_center in pairs(town_centers) do
        local market = town_center.market
        for _, force in pairs(forces) do
            if force.is_chunk_visible(market.surface, town_center.chunk_position) then
                Public.add_chart_tag(force, market)
            end
        end
    end
end

function Public.add_new_force(force_name)
    local force = game.create_force(force_name)
    force.share_chart = true
    force.technologies['atomic-bomb'].enabled = false
    force.technologies['explosive-rocketry'].enabled = false
    force.technologies['rocketry'].enabled = false
    force.technologies['artillery-shell-range-1'].enabled = false
    force.technologies['artillery-shell-speed-1'].enabled = false
    force.set_ammo_damage_modifier('landmine', -0.6)
    force.set_ammo_damage_modifier('artillery-shell', -0.75)
    force.manual_mining_speed_modifier = 1
end

function Public.kill_force(force_name)
    local townytable = Table.get_table()
    local force = game.forces[force_name]
    local market = townytable.town_centers[force_name].market
    local surface = market.surface

    surface.create_entity({name = 'big-artillery-explosion', position = market.position})

    for _, player in pairs(force.players) do
        if player.character then
            player.character.die()
        else
            townytable.requests[player.index] = 'kill-character'
        end
        player.force = game.forces.player
    end

    for _, e in pairs(surface.find_entities_filtered({force = force_name})) do
        if e.valid then
            if e.type == 'wall' or e.type == 'gate' then
                e.die()
            end
        end
    end

    game.merge_forces(force_name, 'neutral')

    townytable.town_centers[force_name] = nil
    townytable.size_of_town_centers = townytable.size_of_town_centers - 1

    delete_chart_tag_for_all_forces(market)
    Public.reveal_entity_to_all(market)

    game.print({'modules_towny.message_destroyed', force_name, '[gps=' .. math.floor(market.position.x) .. ',' .. math.floor(market.position.y) .. ']'}, {255, 255, 0})
end

local player_force_disabled_recipes = {'lab', 'automation-science-pack', 'stone-brick'}
local player_force_enabled_recipes = {
    'submachine-gun',
    'assembling-machine-1',
    'small-lamp',
    'shotgun',
    'shotgun-shell',
    'underground-belt',
    'splitter',
    'steel-plate',
    'car',
    'cargo-wagon',
    'constant-combinator',
    'engine-unit',
    'locomotive',
    'rail',
    'train-stop',
    'arithmetic-combinator',
    'decider-combinator'
}

function Public.setup_player_force()
    local p = game.permissions.create_group('outlander')
    for action_name, _ in pairs(defines.input_action) do
        p.set_allows_action(defines.input_action[action_name], true)
    end
    local defs = {
        defines.input_action.start_research
    }
    for _, d in pairs(defs) do
        p.set_allows_action(d, false)
    end

    local force = game.forces.player
    local recipes = force.recipes

    for k, recipe_name in pairs(player_force_disabled_recipes) do
        recipes[recipe_name].enabled = false
    end
    for k, recipe_name in pairs(player_force_enabled_recipes) do
        recipes[recipe_name].enabled = true
    end

    force.set_ammo_damage_modifier('landmine', -0.6)
    force.set_ammo_damage_modifier('artillery-shell', -0.75)
end

return Public
