<?php
namespace App\Http\Controllers\Api;

use App\Http\Controllers\Api\Controller;
use App\IeoProject;
use App\IeoOrder;
use App\IeoAllocationCode;
use App\UsersWallet;
use App\AccountLog;
use Illuminate\Http\Request;
use App\Token;
use App\Users;
use Illuminate\Support\Facades\DB;

class IeoController extends Controller
{
    public function list(Request $request)
    {
        $status = $request->input('status', 'all');
        $query = IeoProject::query();
        if ($status !== 'all') $query->where('status', $status);
        $list = $query->orderBy('id', 'desc')->get();
        foreach ($list as $item) {
            $real_pct = $item->total_supply > 0 ? round($item->real_sold / $item->total_supply * 100, 2) : 0;
            $item->progress = $item->type == 1 ? max($item->fake_progress, $real_pct) : min($item->fake_progress, 100);
        }
        return $this->success($list);
    }

    public function detail(Request $request)
    {
        $id = $request->input('id');
        $project = IeoProject::find($id);
        if (!$project) return $this->error('Not found');
        $real_pct = $project->total_supply > 0 ? round($project->real_sold / $project->total_supply * 100, 2) : 0;
        $project->progress = $project->type == 1 ? max($project->fake_progress, $real_pct) : min($project->fake_progress, 100);

        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        $project->my_order = null;
        $project->my_order_count = 0;
        if ($user) {
            $order = IeoOrder::where('user_id', $user->id)->where('project_id', $id)->orderBy('id', 'desc')->first();
            if ($order) {
                $statusMap = ['0' => 'Pending', '1' => 'Won', '2' => 'Lost'];
                $order->status_text = $statusMap[$order->status] ?? '';
                $project->my_order = $order;
            }
            $project->my_order_count = IeoOrder::where('user_id', $user->id)->where('project_id', $id)->count();
        }
        return $this->success($project);
    }

    public function subscribe(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');
        $project_id = $request->input('project_id');
        $amount = floatval($request->input('amount'));
        $pay_pwd = $request->input('pay_pwd');

        if ($amount <= 0) return $this->error('Invalid amount');
        $project = IeoProject::find($project_id);
        if (!$project || $project->status != 1) return $this->error('IEO not active');
        if ($amount < $project->min_buy) return $this->error('Min: ' . $project->min_buy . ' USDC');
        if ($project->max_buy > 0 && $amount > $project->max_buy) return $this->error('Max: ' . $project->max_buy . ' USDC');

        $limit = intval($project->subscription_limit);
        if ($limit > 0) {
            $userOrderCount = IeoOrder::where('user_id', $user->id)->where('project_id', $project_id)->count();
            if ($userOrderCount >= $limit) return $this->error('Subscription limit reached: ' . $limit);
        }

        $existingCredit = \App\CreditIeoOrder::where('user_id', $user->id)->where('project_id', $project_id)->whereIn('status', [0, 1])->exists();
        if ($existingCredit) return $this->error('Already subscribed via credit IEO');

        $wallet = UsersWallet::where('user_id', $user->id)->where('currency', 3)->lockForUpdate()->first();
        if (!$wallet || $wallet->legal_balance < $amount) return $this->error('Insufficient balance');

        DB::beginTransaction();
        try {
            $before = $wallet->legal_balance;
            $wallet->legal_balance = bc_sub($wallet->legal_balance, $amount, 6);
            $wallet->save();
            AccountLog::insertLog(
                ['user_id' => $user->id, 'value' => -$amount, 'info' => 'IEO Subscribe - ' . $project->name, 'type' => AccountLog::IEO_OPERATION, 'currency' => 3],
                ['balance_type' => 1, 'wallet_id' => $wallet->id, 'lock_type' => 0, 'before' => $before, 'change' => -$amount, 'after' => $wallet->legal_balance]
            );
            $token_amount = $project->token_price > 0 ? sprintf("%.6f", $amount / $project->token_price) : 0;
            IeoOrder::create([
                'user_id' => $user->id, 'project_id' => $project_id,
                'amount' => $amount, 'token_amount' => $token_amount, 'status' => 0,
            ]);
            $project->increment('real_sold', $token_amount);
            DB::commit();
            return $this->success('Subscription successful');
        } catch (\Exception $e) {
            DB::rollBack();
            return $this->error($e->getMessage());
        }
    }

    public function myOrders(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');
        $list = IeoOrder::where('user_id', $user->id)->with('project:id,name,symbol')->orderBy('id', 'desc')->get();
        $statusMap = ['0' => 'Pending', '1' => 'Won', '2' => 'Lost'];
        foreach ($list as $item) {
            $item->status_text = $statusMap[$item->status] ?? '';
        }
        return $this->success($list);
    }

    public function redeemCode(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');
        $code = trim((string)$request->input('code'));
        $project_id = intval($request->input('project_id'));
        if ($code === '' || !$project_id) return $this->error('Invalid params');

        $project = IeoProject::find($project_id);
        if (!$project || $project->status != 1) return $this->error('IEO not active');

        DB::beginTransaction();
        try {
            $allocCode = IeoAllocationCode::where('project_id', $project_id)
                ->where('code', $code)
                ->lockForUpdate()
                ->first();
            if (!$allocCode) { DB::rollBack(); return $this->error('Invalid code'); }
            if ($allocCode->used) { DB::rollBack(); return $this->error('Code already used'); }

            $amount = floatval($allocCode->amount);
            if ($amount <= 0) { DB::rollBack(); return $this->error('Invalid code amount'); }

            $wallet = UsersWallet::where('user_id', $user->id)->where('currency', 3)->first();
            if (!$wallet || $wallet->legal_balance < $amount) { DB::rollBack(); return $this->error('Insufficient balance'); }

            $before = $wallet->legal_balance;
            $wallet->legal_balance = bc_sub($wallet->legal_balance, $amount, 6);
            $wallet->save();
            AccountLog::insertLog(
                ['user_id' => $user->id, 'value' => -$amount, 'info' => 'IEO Allocation - ' . $project->name, 'type' => AccountLog::IEO_OPERATION, 'currency' => 3],
                ['balance_type' => 1, 'wallet_id' => $wallet->id, 'lock_type' => 0, 'before' => $before, 'change' => -$amount, 'after' => $wallet->legal_balance]
            );

            $token_amount = $project->token_price > 0 ? sprintf("%.6f", $amount / $project->token_price) : 0;
            IeoOrder::create([
                'user_id' => $user->id, 'project_id' => $project_id,
                'amount' => $amount, 'token_amount' => $token_amount, 'status' => 1,
            ]);
            $project->increment('real_sold', $token_amount);

            $allocCode->used = 1;
            $allocCode->user_id = $user->id;
            $allocCode->save();

            DB::commit();
            return $this->success('Redeemed successfully');
        } catch (\Exception $e) {
            DB::rollBack();
            return $this->error($e->getMessage());
        }
    }

    public function allocationOrders(Request $request)
    {
        $user_id = Token::getUserIdByToken(Token::getToken());
        $user = \App\Users::find($user_id);
        if (!$user) return $this->error('Please login');
        $list = IeoAllocationCode::where('user_id', $user->id)
            ->where('used', 1)
            ->with('project:id,name,symbol,token_price,listing_time,unlock_time')
            ->orderBy('id', 'desc')
            ->get();
        return $this->success($list);
    }
}