from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont
from PyPDF2 import PdfReader, PdfWriter
from datetime import datetime, timedelta
import random
import os
import uuid
import calendar

BASE_DIR = os.path.dirname(os.path.abspath(__file__))
FONT_DIR = os.path.join(BASE_DIR, "../assets/fonts")


def generate_mandiri_v1_pdf(data, template_path, output_path):
    from reportlab.lib.colors import HexColor
    TEMP_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "../static/tmp")
    os.makedirs(TEMP_DIR, exist_ok=True)

    packet_path = os.path.join(TEMP_DIR, f"temp_overlay_{uuid.uuid4().hex}.pdf")

    # c = canvas.Canvas(packet_path)
    c = canvas.Canvas(packet_path, pagesize=(842, 595))  # A4 Landscape
    #
    # SOLUSI 2: Dapatkan ukuran dari template PDF
    try:
        template_reader = PdfReader(template_path)
        template_page = template_reader.pages[0]
        template_width = float(template_page.mediabox.width)
        template_height = float(template_page.mediabox.height)
        print(f"Template size: {template_width} x {template_height}")
        
        # Gunakan ukuran yang sama dengan template
        c = canvas.Canvas(packet_path, pagesize=(template_width, template_height))
    except Exception as e:
        print(f"Error reading template size: {e}")
        # Fallback ke A4
        c = canvas.Canvas(packet_path, pagesize=A4)

    # --- Register Figtree fonts (pastikan file font tersedia di FONT_DIR) ---
    FONT_ARIAL_BOLD = os.path.join(FONT_DIR, "ARIALBOLDMT.ttf")
    # FONT_ARIAL = os.path.join(FONT_DIR, "arialmt.ttf")
    FONT_ARIAL = os.path.join(FONT_DIR, "ARIAL.TTF")
    
    pdfmetrics.registerFont(TTFont("ArialBold", FONT_ARIAL_BOLD))
    pdfmetrics.registerFont(TTFont("Arial", FONT_ARIAL))
    
    # --- Data ---
    cabang = data["cabang"]
    nama = data["nama"]
    alamat1 = data["alamat1"]
    alamat2 = data["alamat2"]
    # alamat3 = data["alamat3"]
    kel = data["kel"]
    kec = data["kec"]
    kodpos = data["kodpos"]
    kota_kab = data["kota_kab"]
    

    # Tanggal random dari 3 bulan ke belakang
    now = datetime.now()
    # List 3 bulan ke belakang (misal: Juli 2025 -> [4, 5, 6] = April, Mei, Juni)
    bulan_list = [(now.month - i - 1) % 12 + 1 for i in range(3)]
    tahun_list = [now.year if now.month - i - 1 >= 0 else now.year - 1 for i in range(3)]

    bulan_list = [(now.month - i - 1) % 12 + 1 for i in range(1, 4)]
    tahun_list = [now.year if now.month - i - 1 >= 0 else now.year - 1 for i in range(1, 4)]
    print("Bulan List:", bulan_list)

    # Pilih salah satu bulan dan tahun secara acak
    idx = random.randint(0, 2)
    bulan_target = bulan_list[idx]
    tahun_target = tahun_list[idx]

    # tanggal awal 
    tanggal_awal = f"1/{bulan_target:02d}/{str(tahun_target)[-2:]}"
    # # tanggal akhir di bulan yang sama
    tanggal_akhir_str = f"{calendar.monthrange(tahun_target, bulan_target)[1]:02d}/{bulan_target:02d}/{str(tahun_target)[-2:]}"
    
    
    # Halaman
    poin_total = random.randint(10, 300)
    poin_str = f"{poin_total}"

    halaman_total = random.randint(3, 50)
    halaman_str = f"{halaman_total}"

    
    # Nama nasabah (font light, size 7, hitam, rata kanan)
    c.setFont("ArialBold", 10.5)
    c.setFillColor(HexColor("#0f2b5b"))

    batas_kiri = 43
    batas_adr = 730     
    batas_adr2 = 739     
    jarak = 12
    
    c.drawString(batas_kiri, batas_adr - jarak * 1, nama)   

    c.setFont("Arial", 10.5)
    c.setFillColor(HexColor("#000000"))

    c.drawString(batas_kiri, batas_adr - jarak * 2, alamat1)   
    c.drawString(batas_kiri, batas_adr - jarak * 3, alamat2)   
    
    kel_kec = 'KEL ' + kel + " " if kel else ""
    if kec:
        kel_kec += 'KEC ' + kec
    # c.drawString(40, batas - 24, kel_kec )

    c.drawString(batas_kiri, batas_adr - jarak * 4, kel_kec)
    c.drawString(batas_kiri, batas_adr - jarak * 5, kota_kab + " " + kodpos) 

    c.setFont("ArialBold", 10.50)
    c.setFillColor(HexColor("#000000"))
    c.drawString(130, 742.5, tanggal_awal)
    c.drawString(187, 742.5, tanggal_akhir_str)

    c.setFont("ArialBold", 10)
    c.setFillColor(HexColor("#000000"))
    c.drawString(161, 470.5, poin_str)

    c.setFont("Arial", 8)
    c.drawString(631, 28, halaman_str)
    
    kiri2 = 460
    c.setFont("Arial", 8)
    c.setFillColor(HexColor("#000000"))
    
    
    c.save()

    background = PdfReader(template_path)
    overlay = PdfReader(packet_path)
    writer = PdfWriter()

    page = background.pages[0]
    page.merge_page(overlay.pages[0])
    writer.add_page(page)

    with open(output_path, "wb") as f:
        writer.write(f)

    # Bersihkan file sementara
    if os.path.exists(packet_path):
        os.remove(packet_path)