<?php
ini_set('display_errors', 1);
error_reporting(E_ALL);
header("Content-Type: application/json; charset=utf-8");

try {
    $pdo = new PDO(
        "mysql:host=localhost;dbname=egbim;charset=utf8mb4",
        "egbim",
        "baron3840!!",
        [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
        ]
    );
} catch (Exception $e) {
    echo json_encode(["status" => "fail", "message" => "DB 연결 실패"]);
    exit;
}

$action = $_POST['action'] ?? $_GET['action'] ?? "";

/* -----------------------------------------------------
   LIST
----------------------------------------------------- */
if ($action === "list") {
    $stmt = $pdo->query("
        SELECT *
        FROM sales_targets
        ORDER BY target_month DESC, emp_no ASC
    ");

    echo json_encode([
        "status" => "ok",
        "records" => $stmt->fetchAll()
    ]);
    exit;
}

/* DELETE는 즉시 처리 */
if ($action === "delete") {
    $id = $_POST['id'] ?? 0;

    $stmt = $pdo->prepare("DELETE FROM sales_targets WHERE id = ?");
    $stmt->execute([$id]);

    echo json_encode(["status" => "ok"]);
    exit;
}

/* -----------------------------------------------------
   공통 입력값
----------------------------------------------------- */
$id             = $_POST['id'] ?? 0;
$target_month   = $_POST['target_month'] ?? '';
$emp_no         = $_POST['emp_no'] ?? '';
$target_qty     = $_POST['target_qty'] ?? 0;
$target_amount  = $_POST['target_amount'] ?? 0;

if (!$target_month || !$emp_no) {
    echo json_encode(["status" => "error", "message" => "필수 값 누락"]);
    exit;
}

/* -----------------------------------------------------
   INSERT
----------------------------------------------------- */
if ($action === "insert") {

    $stmt = $pdo->prepare("
        INSERT INTO sales_targets
            (target_month, emp_no, target_qty, target_amount, created_at, created_id)
        VALUES
            (?, ?, ?, ?, NOW(), 'system')
    ");

    $stmt->execute([
        $target_month,
        $emp_no,
        $target_qty,
        $target_amount
    ]);

    echo json_encode([
        "status" => "ok",
        "id" => $pdo->lastInsertId()
    ]);
    exit;
}

/* -----------------------------------------------------
   UPDATE
----------------------------------------------------- */
if ($action === "update") {

    $stmt = $pdo->prepare("
        UPDATE sales_targets
        SET 
            target_month   = ?,
            emp_no         = ?,
            target_qty     = ?,
            target_amount  = ?,
            updated_at     = NOW(),
            updated_id     = 'system'
        WHERE id = ?
    ");

    $stmt->execute([
        $target_month,
        $emp_no,
        $target_qty,
        $target_amount,
        $id
    ]);

    echo json_encode(["status" => "ok"]);
    exit;
}

echo json_encode(["status" => "fail", "message" => "잘못된 요청"]);
exit;