-- server/gang_shops.lua
print("^2[turfwar]^7 gang_shops.lua loaded (server)")

Config = Config or {}
Config.Shops = Config.Shops or {}

-- IMPORTANT:
-- This assumes you already have:
--  - player gang stored server-side somewhere, OR a callback/event to fetch it.
--
-- Below uses a simple server cache:
local playerGang = {} -- [src] = gangId

-- You likely already broadcast this elsewhere.
-- Hook into your existing gang set event if you have one.
RegisterNetEvent("turfwar:myGang:set", function(gangId)
    local src = source
    playerGang[src] = tonumber(gangId) or 0
end)

AddEventHandler("playerDropped", function()
    local src = source
    playerGang[src] = nil
end)

local function getGangId(src)
    return tonumber(playerGang[src]) or 0
end

-- =========================
-- DB helpers (gang bank)
-- =========================
local function dbFetchBalance(gangId, cb)
    exports.oxmysql:query("SELECT balance FROM turfwar_gang_accounts WHERE gang_id = ? LIMIT 1", { gangId }, function(rows)
        local bal = 0
        if rows and rows[1] and rows[1].balance then bal = tonumber(rows[1].balance) or 0 end
        cb(bal)
    end)
end

local function dbEnsureRow(gangId, cb)
    exports.oxmysql:query("INSERT IGNORE INTO turfwar_gang_accounts (gang_id, balance) VALUES (?, 0)", { gangId }, function()
        cb()
    end)
end

local function dbDeduct(gangId, amount, cb)
    amount = tonumber(amount) or 0
    if amount <= 0 then cb(false, "bad_amount") return end

    dbEnsureRow(gangId, function()
        exports.oxmysql:query("UPDATE turfwar_gang_accounts SET balance = balance - ? WHERE gang_id = ? AND balance >= ?", {
            amount, gangId, amount
        }, function(result)
            -- oxmysql UPDATE result varies by version; handle common cases:
            local changed = 0
            if type(result) == "table" and result.affectedRows then changed = result.affectedRows end
            if type(result) == "number" then changed = result end

            cb(changed and changed > 0, changed and changed > 0 and nil or "insufficient")
        end)
    end)
end

-- =========================
-- Lookup helpers
-- =========================
local function findWeaponItem(itemId)
    if not Config.Shops or not Config.Shops.WeaponList then return nil end
    for _, it in ipairs(Config.Shops.WeaponList) do
        if it.id == itemId then return it end
    end
    return nil
end

local function findAmmoItem(itemId)
    if not Config.Shops or not Config.Shops.AmmoList then return nil end
    for _, it in ipairs(Config.Shops.AmmoList) do
        if it.id == itemId then return it end
    end
    return nil
end

local function findVehicleItem(itemId)
    if not Config.Shops or not Config.Shops.VehicleList then return nil end
    for _, it in ipairs(Config.Shops.VehicleList) do
        if it.id == itemId then return it end
    end
    return nil
end

-- =========================
-- Purchase: weapons
-- =========================
RegisterNetEvent("turfwar:shop:buyWeapon", function(itemId)
    local src = source
    local gangId = getGangId(src)

    if not (Config.Shops.AllowedGang and Config.Shops.AllowedGang(gangId)) then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~You can't use the gang shop.")
        return
    end

    local item = findWeaponItem(itemId)
    if not item then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Invalid item.")
        return
    end

    local price = tonumber(item.price) or 0
    if price < 0 then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Bad price config.")
        return
    end

    dbDeduct(gangId, price, function(ok, reason)
        if not ok then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~Not enough gang cash.")
            return
        end

        -- Grant on client (server-authoritative purchase)
        TriggerClientEvent("turfwar:shop:grantWeapon", src, item, gangId)
        TriggerClientEvent("turfwar:shop:notify", src, ("~g~Purchased: ~s~%s"):format(item.label or item.id))
        TriggerClientEvent("turfwar:gangbank:requestRefresh", src) -- optional hook
    end)
end)

RegisterNetEvent("turfwar:shop:buyAmmo", function(itemId)
    local src = source
    local gangId = getGangId(src)

    if not (Config.Shops.AllowedGang and Config.Shops.AllowedGang(gangId)) then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~You can't use the gang shop.")
        return
    end

    local item = findAmmoItem(itemId)
    if not item then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Invalid ammo item.")
        return
    end

    local price = tonumber(item.price) or 0
    if price <= 0 then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Bad price config.")
        return
    end

    dbDeduct(gangId, price, function(ok)
        if not ok then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~Not enough gang cash.")
            return
        end

        TriggerClientEvent("turfwar:shop:grantAmmo", src, item)
        TriggerClientEvent("turfwar:shop:notify", src, ("~g~Purchased: ~s~%s"):format(item.label or item.id))
        TriggerClientEvent("turfwar:gangbank:requestRefresh", src)
    end)
end)

-- =========================
-- Purchase: vehicles
-- =========================
RegisterNetEvent("turfwar:shop:buyVehicle", function(itemId)
    local src = source
    local gangId = getGangId(src)

    if not (Config.Shops.AllowedGang and Config.Shops.AllowedGang(gangId)) then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~You can't use the gang shop.")
        return
    end

    local item = findVehicleItem(itemId)
    if not item then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Invalid vehicle.")
        return
    end

    local price = tonumber(item.price)
    if price == nil then price = 0 end

    -- Allow FREE vehicles (price = 0). Only reject negative.
    if price < 0 then
        TriggerClientEvent("turfwar:shop:notify", src, "~r~Bad price config.")
        return
    end

    local function afterPaid()
        -- Use your existing spawn-pad system
        if not VehicleSpawner or not VehicleSpawner.SpawnModelFor then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~VehicleSpawner not available.")
            return
        end

        -- Support special model alias for "gang default"
        local model = item.model
        if model == "__GANG_DEFAULT__" then
            model = (Config.Vehicles and Config.Vehicles.gangModels and Config.Vehicles.gangModels[gangId])
        end

        if type(model) ~= "string" or model == "" then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~No vehicle configured for your gang.")
            return
        end

        local ok2, reason = VehicleSpawner.SpawnModelFor(src, model, { platePrefix = "G" })
        if not ok2 then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~Vehicle spawn failed.")
            return
        end

        TriggerClientEvent("turfwar:shop:notify", src, ("~g~Purchased: ~s~%s"):format(item.label or item.id))
        TriggerClientEvent("turfwar:gangbank:requestRefresh", src)
    end

    -- If free, don't touch the gang bank
    if price == 0 then
        afterPaid()
        return
    end

    -- Deduct first (server authority)
    dbDeduct(gangId, price, function(ok)
        if not ok then
            TriggerClientEvent("turfwar:shop:notify", src, "~r~Not enough gang cash.")
            return
        end
        afterPaid()
    end)
end)


-- Optional: allow client to query gang balance (for UI)
RegisterNetEvent("turfwar:shop:getBalance", function()
    local src = source
    local gangId = getGangId(src)
    if gangId <= 0 then
        TriggerClientEvent("turfwar:shop:balance", src, 0)
        return
    end
    dbFetchBalance(gangId, function(bal)
        TriggerClientEvent("turfwar:shop:balance", src, bal)
    end)
end)