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

local upgrade_functions = {
    --Upgrade Town Center Health
    [1] = function(town_center)
        if town_center.max_health > 500000 then
            return
        end
        town_center.health = town_center.health + town_center.max_health
        town_center.max_health = town_center.max_health * 2
        Town_center.set_market_health(town_center.market, 0)
    end,
    --Upgrade Backpack
    [2] = function(town_center)
        local force = town_center.market.force
        if force.character_inventory_slots_bonus >= 100 then
            return
        end
        force.character_inventory_slots_bonus = force.character_inventory_slots_bonus + 5
    end,
    --Upgrade Backpack
    [3] = function(town_center)
        local force = town_center.market.force
        if town_center.upgrades.mining_prod >= 10 then
            return
        end
        town_center.upgrades.mining_prod = town_center.upgrades.mining_prod + 1
        force.mining_drill_productivity_bonus = force.mining_drill_productivity_bonus + 0.1
    end
}

local function clear_offers(market)
    for i = 1, 256, 1 do
        local a = market.remove_market_item(1)
        if a == false then
            return
        end
    end
end

local function set_offers(town_center)
    local market = town_center.market
    local force = market.force

    local special_offers = {}
    if town_center.max_health < 500000 then
        special_offers[1] = {{{'coin', town_center.max_health * 0.1}}, {'modules_towny.upgrade_hp'}}
    else
        special_offers[1] = {{{'infinity-chest', 1}}, {'modules_towny.upgrade_hp_max'}}
    end
    if force.character_inventory_slots_bonus < 100 then
        special_offers[2] = {{{'coin', (force.character_inventory_slots_bonus / 5 + 1) * 50}}, {'modules_towny.upgrade_backpack'}}
    else
        special_offers[2] = {{{'infinity-chest', 1}}, {'modules_towny.upgrade_backpack_max'}}
    end
    if town_center.upgrades.mining_prod < 10 then
        special_offers[3] = {{{'coin', (town_center.upgrades.mining_prod + 1) * 400}}, {'modules_towny.upgrade_mining'}}
    else
        special_offers[3] = {{{'infinity-chest', 1}}, {'modules_towny.upgrade_mining_max'}}
    end

    local market_items = {}
    for _, v in pairs(special_offers) do
        table.insert(market_items, {price = v[1], offer = {type = 'nothing', effect_description = v[2]}})
    end

    table.insert(market_items, {price = {{'coin', 1}}, offer = {type = 'give-item', item = 'raw-fish', count = 1}})
    table.insert(market_items, {price = {{'coin', 8}}, offer = {type = 'give-item', item = 'wood', count = 50}})
    table.insert(market_items, {price = {{'coin', 8}}, offer = {type = 'give-item', item = 'iron-ore', count = 50}})
    table.insert(market_items, {price = {{'coin', 8}}, offer = {type = 'give-item', item = 'copper-ore', count = 50}})
    table.insert(market_items, {price = {{'coin', 8}}, offer = {type = 'give-item', item = 'stone', count = 50}})
    table.insert(market_items, {price = {{'coin', 8}}, offer = {type = 'give-item', item = 'coal', count = 50}})
    table.insert(market_items, {price = {{'coin', 12}}, offer = {type = 'give-item', item = 'uranium-ore', count = 50}})
    table.insert(market_items, {price = {{'wood', 7}}, offer = {type = 'give-item', item = 'coin'}})
    table.insert(market_items, {price = {{'iron-ore', 7}}, offer = {type = 'give-item', item = 'coin'}})
    table.insert(market_items, {price = {{'copper-ore', 7}}, offer = {type = 'give-item', item = 'coin'}})
    table.insert(market_items, {price = {{'stone', 7}}, offer = {type = 'give-item', item = 'coin'}})
    table.insert(market_items, {price = {{'coal', 7}}, offer = {type = 'give-item', item = 'coin'}})
    table.insert(market_items, {price = {{'uranium-ore', 5}}, offer = {type = 'give-item', item = 'coin'}})

    table.insert(market_items, {price = {{'coin', 300}}, offer = {type = 'give-item', item = 'loader', count = 1}})
    table.insert(market_items, {price = {{'coin', 600}}, offer = {type = 'give-item', item = 'fast-loader', count = 1}})
    table.insert(market_items, {price = {{'coin', 900}}, offer = {type = 'give-item', item = 'express-loader', count = 1}})

    for _, item in pairs(market_items) do
        market.add_market_item(item)
    end
end

function Public.refresh_offers(event)
    local townytable = Table.get_table()
    local market = event.entity or event.market
    if not market then
        return
    end
    if not market.valid then
        return
    end
    if market.name ~= 'market' then
        return
    end
    local town_center = townytable.town_centers[market.force.name]
    if not town_center then
        return
    end
    clear_offers(market)
    set_offers(town_center)
end

function Public.offer_purchased(event)
    local townytable = Table.get_table()
    local offer_index = event.offer_index
    if not upgrade_functions[offer_index] then
        return
    end

    local market = event.market

    local town_center = townytable.town_centers[market.force.name]
    if not town_center then
        return
    end

    upgrade_functions[offer_index](town_center)

    count = event.count
    if count > 1 then
        local offers = market.get_market_items()
        local price = offers[offer_index].price[1].amount
        game.players[event.player_index].insert({name = 'coin', count = price * (count - 1)})
    end
end

return Public