<?php
header("Content-Type: application/json; charset=utf-8");

// -------------------------------------------
// DB 연결 (네가 스케줄 등 다른 페이지에서 쓰는 방식 그대로)
// -------------------------------------------
$pdo = new PDO(
    "mysql:host=localhost;dbname=egbim;charset=utf8mb4",
    "egbim",
    "baron3840!!",
    [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
    ]
);

$action = $_REQUEST['action'] ?? '';
$issue_month = $_REQUEST['issue_month'] ?? '';
$issue_text = $_REQUEST['issue_text'] ?? '';

/*
    테이블: sales_month_issues
    id (PK)
    issue_month (CHAR 7) 예: 2025-12
    issue_text (TEXT)
    created_at (DATETIME)
    updated_at (DATETIME)
*/

// -------------------------------------------
// 📌 1) 주요 이슈 조회
// -------------------------------------------
if ($action === 'get') {

    $stmt = $pdo->prepare("
        SELECT issue_text 
          FROM sales_month_issues 
         WHERE issue_month = :m
         LIMIT 1
    ");
    $stmt->execute([":m" => $issue_month]);
    $row = $stmt->fetch(PDO::FETCH_ASSOC);

    echo json_encode([
        "issue_text" => $row['issue_text'] ?? ""
    ]);
    exit;
}


// -------------------------------------------
// 📌 2) 주요 이슈 저장 (UPDATE / INSERT)
// -------------------------------------------
if ($action === 'save') {

    // 같은 month가 있는지 체크
    $stmt = $pdo->prepare("
        SELECT id FROM sales_month_issues WHERE issue_month = :m LIMIT 1
    ");
    $stmt->execute([":m" => $issue_month]);
    $row = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($row) {
        // UPDATE
        $stmt = $pdo->prepare("
            UPDATE sales_month_issues
               SET issue_text = :t,
                   updated_at = NOW()
             WHERE id = :id
        ");
        $stmt->execute([
            ":t" => $issue_text,
            ":id" => $row['id']
        ]);

    } else {
        // INSERT
        $stmt = $pdo->prepare("
            INSERT INTO sales_month_issues (issue_month, issue_text, created_at, updated_at)
            VALUES (:m, :t, NOW(), NOW())
        ");
        $stmt->execute([
            ":m" => $issue_month,
            ":t" => $issue_text
        ]);
    }

    echo json_encode(["success" => true]);
    exit;
}


// -------------------------------------------
// invalid
// -------------------------------------------
echo json_encode(["error" => "invalid_action"]);
exit;