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_jago_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)

    # --- Register Figtree fonts (pastikan file font tersedia di FONT_DIR) ---
    FONT_TTC_BOLD = os.path.join(FONT_DIR, "TT_Commons_Bold.ttf")
    FONT_TTC_DEMIBOLD = os.path.join(FONT_DIR, "TT-Commons-DemiBold.ttf")
    FONT_TTC_REG = os.path.join(FONT_DIR, "TT-Commons-Regular.ttf")
    
    
    pdfmetrics.registerFont(TTFont("ttcBold", FONT_TTC_BOLD))
    pdfmetrics.registerFont(TTFont("ttcDemiBold", FONT_TTC_DEMIBOLD))
    pdfmetrics.registerFont(TTFont("ttcReg", FONT_TTC_REG))
    
    # --- 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"]
    provinsi = data["provinsi"]

    # 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]

    # Ambil nama bulan dari angka bulan
    nama_bulan = calendar.month_name[bulan_target]

    # Format akhir: 1 June 2025
    periode = f"{nama_bulan} {tahun_target}"

    nama_norek = '10' + ''.join(random.choices('0123456789', k=10))    

    # Halaman
    halaman_total = random.randint(2, 200)
    halaman_str = f"{halaman_total}"

    batas_kiri = 20
    
    batas_adr1 = 763
    batas_adr = 761     
    jarak = 12
    
    c.setFont("ttcDemiBold", 14.9)
    c.setFillColor(HexColor("#000000"))
    c.drawString(batas_kiri, batas_adr1 - jarak * 1, nama + " / " + nama_norek)   

    c.setFont("ttcDemiBold", 10)
    c.setFillColor(HexColor("#8b8181"))
    c.drawString(batas_kiri, batas_adr - jarak * 2, alamat1 + " " + alamat2)   
    
    kel_kec = '' + kel + "" if kel else ""
    if kec:
        kel_kec += ', ' + kec
    
    c.drawString(batas_kiri, batas_adr - jarak * 3, kel_kec)
    c.drawString(batas_kiri, batas_adr - jarak * 4, kota_kab + ", " + provinsi) 
    
    c.setFont("ttcBold", 9)
    c.setFillColor(HexColor("#000000"))
    c.drawString(476, 809, periode)
    c.setFont("ttcReg", 9)
    c.drawString(568, 809, halaman_str)

    c.setFont("ttcBold", 9)
    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)