-- =====================================================
-- MIGRATION SCRIPT: Pengajuan Izin/Sakit Feature
-- Run this script on your MySQL database server
-- =====================================================

-- 1. Add phone column to staff_users table (for Guru BK WhatsApp notification)
ALTER TABLE staff_users 
ADD COLUMN IF NOT EXISTS phone VARCHAR(20) AFTER role;

-- Alternative syntax if your MySQL version doesn't support IF NOT EXISTS:
-- First check if column exists, if not add it
-- SET @exist := (SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'staff_users' AND COLUMN_NAME = 'phone');
-- SET @sql := IF(@exist = 0, 'ALTER TABLE staff_users ADD COLUMN phone VARCHAR(20) AFTER role', 'SELECT "Column already exists"');
-- PREPARE stmt FROM @sql;
-- EXECUTE stmt;

-- 2. Update attendance status ENUM to include SAKIT and IZIN
ALTER TABLE attendance 
MODIFY COLUMN status ENUM('PRESENT', 'LATE', 'REGISTRATION', 'ALFA', 'SAKIT', 'IZIN') DEFAULT 'PRESENT';

-- 3. Create leave_requests table (Pengajuan Izin/Sakit dari Siswa)
CREATE TABLE IF NOT EXISTS leave_requests (
    id VARCHAR(36) PRIMARY KEY,
    student_id VARCHAR(36) NOT NULL COMMENT 'ID siswa yang mengajukan',
    student_name VARCHAR(255) NOT NULL COMMENT 'Nama siswa',
    student_nis VARCHAR(50) COMMENT 'NIS siswa',
    student_class VARCHAR(100) COMMENT 'Kelas siswa',
    request_type ENUM('SAKIT', 'IZIN') NOT NULL COMMENT 'Jenis pengajuan',
    request_date VARCHAR(20) NOT NULL COMMENT 'Tanggal izin (YYYY-MM-DD)',
    reason TEXT NOT NULL COMMENT 'Alasan pengajuan',
    photo_evidence LONGTEXT COMMENT 'Bukti foto (base64 atau URL)',
    status ENUM('PENDING', 'APPROVED', 'REJECTED') DEFAULT 'PENDING' COMMENT 'Status pengajuan',
    reviewed_by VARCHAR(36) COMMENT 'ID Guru BK yang mereview',
    reviewed_by_name VARCHAR(255) COMMENT 'Nama Guru BK yang mereview',
    reviewed_at TIMESTAMP NULL COMMENT 'Waktu review',
    rejection_reason TEXT COMMENT 'Alasan penolakan (wajib jika status REJECTED)',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT 'Waktu pengajuan dibuat',
    INDEX idx_student (student_id),
    INDEX idx_status (status),
    INDEX idx_date (request_date),
    INDEX idx_created (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 4. Add Fonnte Token setting if not exists
INSERT IGNORE INTO settings (setting_key, setting_value) 
VALUES ('FONNTE_TOKEN', '');

-- =====================================================
-- VERIFICATION QUERIES (Run to check if migration success)
-- =====================================================

-- Check staff_users has phone column:
-- DESCRIBE staff_users;

-- Check leave_requests table exists:
-- SHOW TABLES LIKE 'leave_requests';

-- Check attendance status enum:
-- SHOW COLUMNS FROM attendance LIKE 'status';

-- =====================================================
-- SAMPLE DATA FOR TESTING (Optional)
-- =====================================================

-- Create a sample Guru BK account with phone (change password hash as needed)
-- INSERT INTO staff_users (id, username, password, name, role, phone, is_active) 
-- VALUES (
--     UUID(), 
--     'gurubk1', 
--     SHA2('password123', 256),  -- Password: password123
--     'Guru BK Test', 
--     'GURU_BK', 
--     '628123456789',  -- WhatsApp number
--     TRUE
-- );

-- =====================================================
-- NOTES:
-- - Nomor WhatsApp harus format: 628xxxxxxxxxx (tanpa + atau 0)
-- - Fonnte Token didapat dari dashboard fonnte.com
-- - Guru BK bisa lebih dari 1, semua akan menerima notifikasi WA
-- =====================================================