#!/usr/bin/env python3
"""AutoFax GUI - Simple tkinter interface for sending faxes on a schedule."""

import json
import os
import subprocess
import sys
import threading
import time
import tkinter as tk
from datetime import datetime, timezone
from pathlib import Path
from tkinter import filedialog, messagebox, scrolledtext

import requests

# Determine base directory (works for both script and frozen exe)
if getattr(sys, "frozen", False):
    BASE_DIR = Path(sys.executable).parent
else:
    BASE_DIR = Path(__file__).parent

CONFIG_FILE = BASE_DIR / "autofax_config.json"
CLAIMS_DIR = BASE_DIR / "claims"
REPORTS_DIR = BASE_DIR / "reports"
LOG_FILE = REPORTS_DIR / "fax_log.json"


class AutoFaxApp:
    def __init__(self, root: tk.Tk):
        self.root = root
        self.root.title("AutoFax - Insurance Claim Faxer")
        self.root.geometry("620x720")
        self.root.resizable(False, False)

        self.running = False
        self.timer_thread = None
        self.config = self.load_config()

        self.build_ui()
        self.populate_fields()
        self.update_status_display()

    # ── Config persistence ──────────────────────────────────────────

    def load_config(self) -> dict:
        if CONFIG_FILE.exists():
            try:
                return json.loads(CONFIG_FILE.read_text())
            except Exception:
                pass
        return {}

    def save_config(self):
        self.config = {
            "project_id": self.project_id_var.get().strip(),
            "key_id": self.key_id_var.get().strip(),
            "key_secret": self.key_secret_var.get().strip(),
            "from_number": self.from_var.get().strip(),
            "to_number": self.to_var.get().strip(),
            "pdf_path": self.pdf_var.get().strip(),
            "ntfy_url": self.ntfy_url_var.get().strip(),
            "ntfy_token": self.ntfy_token_var.get().strip(),
        }
        CONFIG_FILE.write_text(json.dumps(self.config, indent=2))

    # ── UI ──────────────────────────────────────────────────────────

    def build_ui(self):
        # Header
        header = tk.Frame(self.root, bg="#1a1a2e", height=50)
        header.pack(fill="x")
        header.pack_propagate(False)
        tk.Label(
            header, text="AutoFax", font=("Arial", 18, "bold"),
            bg="#1a1a2e", fg="white",
        ).pack(side="left", padx=15, pady=8)
        self.status_label = tk.Label(
            header, text="Stopped", font=("Arial", 11),
            bg="#1a1a2e", fg="#e74c3c",
        )
        self.status_label.pack(side="right", padx=15)

        # Main frame with padding
        main = tk.Frame(self.root, padx=15, pady=10)
        main.pack(fill="both", expand=True)

        # ── Sinch Settings ──
        lf_sinch = tk.LabelFrame(main, text="Sinch Settings", padx=10, pady=5)
        lf_sinch.pack(fill="x", pady=(0, 8))

        self.project_id_var = tk.StringVar()
        self.key_id_var = tk.StringVar()
        self.key_secret_var = tk.StringVar()
        self.from_var = tk.StringVar()

        self._add_field(lf_sinch, "Project ID:", self.project_id_var)
        self._add_field(lf_sinch, "Key ID:", self.key_id_var)
        self._add_field(lf_sinch, "Key Secret:", self.key_secret_var, show="*")
        self._add_field(lf_sinch, "From (optional):", self.from_var, placeholder="+1XXXXXXXXXX")

        # ── Fax Settings ──
        lf_fax = tk.LabelFrame(main, text="Fax Settings", padx=10, pady=5)
        lf_fax.pack(fill="x", pady=(0, 8))

        self.to_var = tk.StringVar()
        self.pdf_var = tk.StringVar()

        self._add_field(lf_fax, "To Number:", self.to_var, placeholder="+1XXXXXXXXXX")

        pdf_frame = tk.Frame(lf_fax)
        pdf_frame.pack(fill="x", pady=2)
        tk.Label(pdf_frame, text="Claim PDF:", width=14, anchor="w").pack(side="left")
        tk.Entry(pdf_frame, textvariable=self.pdf_var, width=35).pack(side="left", fill="x", expand=True)
        tk.Button(pdf_frame, text="Browse...", command=self.browse_pdf).pack(side="left", padx=(5, 0))

        # ── ntfy (optional) ──
        lf_ntfy = tk.LabelFrame(main, text="Notifications (optional)", padx=10, pady=5)
        lf_ntfy.pack(fill="x", pady=(0, 8))

        self.ntfy_url_var = tk.StringVar()
        self.ntfy_token_var = tk.StringVar()

        self._add_field(lf_ntfy, "ntfy URL:", self.ntfy_url_var, placeholder="https://ntfy.sh/your-topic")
        self._add_field(lf_ntfy, "ntfy Token:", self.ntfy_token_var, show="*", placeholder="Bearer tk_...")

        # ── Controls ──
        btn_frame = tk.Frame(main)
        btn_frame.pack(fill="x", pady=(0, 8))

        self.start_btn = tk.Button(
            btn_frame, text="Start Hourly Faxing", font=("Arial", 12, "bold"),
            bg="#2d8a4e", fg="white", command=self.toggle_running,
            width=20, height=2,
        )
        self.start_btn.pack(side="left")

        tk.Button(
            btn_frame, text="Send Once Now", command=self.send_once,
        ).pack(side="left", padx=(10, 0))

        tk.Button(
            btn_frame, text="Open Report", command=self.open_report,
        ).pack(side="right")

        # ── Log ──
        tk.Label(main, text="Activity Log:", anchor="w").pack(fill="x")
        self.log_text = scrolledtext.ScrolledText(
            main, height=12, font=("Consolas", 9), state="disabled",
        )
        self.log_text.pack(fill="both", expand=True)

    def _add_field(self, parent, label, var, show=None, placeholder=None):
        frame = tk.Frame(parent)
        frame.pack(fill="x", pady=2)
        tk.Label(frame, text=label, width=14, anchor="w").pack(side="left")
        entry = tk.Entry(frame, textvariable=var, show=show or "")
        entry.pack(side="left", fill="x", expand=True)
        if placeholder:
            entry.insert(0, placeholder)
            entry.config(fg="grey")
            entry.bind("<FocusIn>", lambda e, ent=entry, ph=placeholder: self._clear_placeholder(ent, ph))
            entry.bind("<FocusOut>", lambda e, ent=entry, ph=placeholder, v=var: self._restore_placeholder(ent, ph, v))

    def _clear_placeholder(self, entry, placeholder):
        if entry.get() == placeholder:
            entry.delete(0, "end")
            entry.config(fg="black")

    def _restore_placeholder(self, entry, placeholder, var):
        if not var.get().strip() or var.get().strip() == placeholder:
            entry.delete(0, "end")
            entry.insert(0, placeholder)
            entry.config(fg="grey")

    def populate_fields(self):
        c = self.config
        for key, var in [
            ("project_id", self.project_id_var),
            ("key_id", self.key_id_var),
            ("key_secret", self.key_secret_var),
            ("from_number", self.from_var),
            ("to_number", self.to_var),
            ("pdf_path", self.pdf_var),
            ("ntfy_url", self.ntfy_url_var),
            ("ntfy_token", self.ntfy_token_var),
        ]:
            if c.get(key):
                var.set(c[key])

    # ── Actions ─────────────────────────────────────────────────────

    def browse_pdf(self):
        path = filedialog.askopenfilename(
            title="Select Claim PDF",
            filetypes=[("PDF files", "*.pdf")],
            initialdir=str(CLAIMS_DIR) if CLAIMS_DIR.exists() else str(BASE_DIR),
        )
        if path:
            self.pdf_var.set(path)

    def validate(self) -> bool:
        problems = []
        if not self.project_id_var.get().strip():
            problems.append("Project ID is required")
        if not self.key_id_var.get().strip():
            problems.append("Key ID is required")
        if not self.key_secret_var.get().strip():
            problems.append("Key Secret is required")
        to_num = self.to_var.get().strip()
        if not to_num or to_num == "+1XXXXXXXXXX":
            problems.append("To Number is required")
        pdf = self.pdf_var.get().strip()
        if not pdf or not Path(pdf).is_file():
            problems.append("Select a valid claim PDF file")
        if problems:
            messagebox.showerror("Missing Configuration", "\n".join(problems))
            return False
        return True

    def toggle_running(self):
        if self.running:
            self.stop()
        else:
            self.start()

    def start(self):
        if not self.validate():
            return
        self.save_config()
        self.running = True
        self.start_btn.config(text="Stop Faxing", bg="#c0392b")
        self.status_label.config(text="Running (hourly)", fg="#2d8a4e")
        self.log("Started hourly fax schedule.")
        self.timer_thread = threading.Thread(target=self.run_loop, daemon=True)
        self.timer_thread.start()

    def stop(self):
        self.running = False
        self.start_btn.config(text="Start Hourly Faxing", bg="#2d8a4e")
        self.status_label.config(text="Stopped", fg="#e74c3c")
        self.log("Stopped.")

    def send_once(self):
        if not self.validate():
            return
        self.save_config()
        self.log("Sending single fax...")
        threading.Thread(target=self._do_send, daemon=True).start()

    def run_loop(self):
        self._do_send()
        while self.running:
            for _ in range(3600):
                if not self.running:
                    return
                time.sleep(1)
            if self.running:
                self._do_send()

    # ── Fax logic ───────────────────────────────────────────────────

    def _auth(self):
        return (self.key_id_var.get().strip(), self.key_secret_var.get().strip())

    def _api_url(self):
        return f"https://fax.api.sinch.com/v3/projects/{self.project_id_var.get().strip()}"

    def _do_send(self):
        pdf_path = Path(self.pdf_var.get().strip())
        to_number = self.to_var.get().strip()
        from_number = self.from_var.get().strip()
        if from_number == "+1XXXXXXXXXX":
            from_number = ""
        timestamp = datetime.now(timezone.utc).isoformat()

        try:
            self.log(f"Sending fax to {to_number}...")
            form_data = {"to": to_number}
            if from_number:
                form_data["from"] = from_number
            with open(pdf_path, "rb") as f:
                resp = requests.post(
                    f"{self._api_url()}/faxes",
                    auth=self._auth(),
                    files={"file": (pdf_path.name, f, "application/pdf")},
                    data=form_data,
                    timeout=60,
                )
            resp.raise_for_status()
            fax_data = resp.json()
            fax_id = fax_data.get("id")
            status = fax_data.get("status", "QUEUED")

            entry = {
                "timestamp": timestamp,
                "status": status,
                "fax_id": fax_id,
                "to": to_number,
                "from": from_number,
                "file": pdf_path.name,
                "error": None,
            }

            # Brief wait then check status
            if fax_id and status == "QUEUED":
                time.sleep(15)
                try:
                    sr = requests.get(
                        f"{self._api_url()}/faxes/{fax_id}",
                        auth=self._auth(), timeout=15,
                    )
                    sr.raise_for_status()
                    sd = sr.json()
                    entry["status"] = sd.get("status", status)
                    if entry["status"] == "FAILURE":
                        entry["failure_reason"] = sd.get("failureReason", "Unknown")
                except Exception:
                    pass

            self.log(f"Fax {entry['status']} (ID: {fax_id})")

        except requests.HTTPError as e:
            error_detail = ""
            try:
                error_detail = e.response.text[:300]
            except Exception:
                pass
            entry = {
                "timestamp": timestamp,
                "status": "send_failed",
                "fax_id": None,
                "to": to_number,
                "from": from_number,
                "file": pdf_path.name,
                "error": f"{e} | {error_detail}",
            }
            self.log(f"FAILED: {e}")
        except Exception as e:
            entry = {
                "timestamp": timestamp,
                "status": "send_failed",
                "fax_id": None,
                "to": to_number,
                "from": from_number,
                "file": pdf_path.name,
                "error": str(e),
            }
            self.log(f"FAILED: {e}")

        self._save_entry(entry)
        self._generate_report()
        self._notify(entry)
        self.update_status_display()

    def _save_entry(self, entry: dict):
        REPORTS_DIR.mkdir(parents=True, exist_ok=True)
        entries = []
        if LOG_FILE.exists():
            try:
                entries = json.loads(LOG_FILE.read_text())
            except Exception:
                pass
        entries.append(entry)
        LOG_FILE.write_text(json.dumps(entries, indent=2))

    def _notify(self, entry: dict):
        ntfy_url = self.ntfy_url_var.get().strip()
        if not ntfy_url or ntfy_url.startswith("https://ntfy.sh/your"):
            return
        try:
            status_labels = {
                "COMPLETED": "Fax Delivered", "IN_PROGRESS": "Fax Sending",
                "QUEUED": "Fax Queued",
            }
            subject = status_labels.get(entry["status"], "Fax Failed")
            msg = f"To: {entry['to']}\nStatus: {entry['status']}\nFile: {entry['file']}"
            if entry.get("error"):
                msg += f"\nError: {entry['error']}"
            hdrs = {"Title": subject}
            ntfy_token = self.ntfy_token_var.get().strip()
            if ntfy_token and not ntfy_token.startswith("Bearer tk_..."):
                hdrs["Authorization"] = ntfy_token
            if entry["status"] not in ("QUEUED", "IN_PROGRESS", "COMPLETED"):
                hdrs["Priority"] = "high"
            requests.post(ntfy_url, data=msg.encode(), headers=hdrs, timeout=10)
        except Exception:
            pass

    def _generate_report(self):
        REPORTS_DIR.mkdir(parents=True, exist_ok=True)
        entries = []
        if LOG_FILE.exists():
            try:
                entries = json.loads(LOG_FILE.read_text())
            except Exception:
                return

        if not entries:
            return

        total = len(entries)
        success_statuses = {"QUEUED", "IN_PROGRESS", "COMPLETED"}
        failed = sum(1 for e in entries if e["status"] not in success_statuses)
        succeeded = sum(1 for e in entries if e["status"] == "COMPLETED")
        pending = total - failed - succeeded

        rows = ""
        for i, e in enumerate(entries, 1):
            status = e["status"]
            if status == "COMPLETED":
                sc, sd = "success", "DELIVERED"
            elif status in ("QUEUED", "IN_PROGRESS"):
                sc, sd = "pending", status
            else:
                sc, sd = "failed", "FAILED"

            error_col = e.get("error") or e.get("failure_reason") or "-"
            try:
                dt = datetime.fromisoformat(e["timestamp"])
                ts = dt.strftime("%b %d, %Y %I:%M %p UTC")
            except Exception:
                ts = e["timestamp"]

            rows += f'<tr><td>{i}</td><td>{ts}</td><td>{e.get("to", "-")}</td>'
            rows += f'<td class="{sc}">{sd}</td><td>{e.get("fax_id") or "-"}</td>'
            rows += f'<td class="error">{error_col}</td></tr>\n'

        html = f"""<!DOCTYPE html>
<html><head><meta charset="utf-8"><title>Fax Transmission Report</title>
<style>
body{{font-family:Arial,sans-serif;margin:40px;color:#333}}
h1{{color:#1a1a2e;border-bottom:2px solid #1a1a2e;padding-bottom:10px}}
.summary{{background:#f5f5f5;padding:20px;border-radius:8px;margin:20px 0}}
.summary span{{font-weight:bold}}
table{{border-collapse:collapse;width:100%;margin:20px 0;font-size:14px}}
th{{background:#1a1a2e;color:#fff;padding:12px 8px;text-align:left}}
td{{padding:10px 8px;border-bottom:1px solid #ddd}}
tr:nth-child(even){{background:#f9f9f9}}
.success{{color:#2d8a4e;font-weight:bold}}
.failed{{color:#c0392b;font-weight:bold}}
.pending{{color:#e67e22;font-weight:bold}}
.error{{font-size:12px;color:#888;max-width:300px;word-wrap:break-word}}
.footer{{margin-top:30px;font-size:12px;color:#888;border-top:1px solid #ddd;padding-top:10px}}
@media print{{body{{margin:20px}}}}
</style></head><body>
<h1>Fax Transmission Report</h1>
<div class="summary">
<p>This report documents automated fax transmission attempts to the insurance
company for claim processing.</p>
<p>Total attempts: <span>{total}</span> |
Delivered: <span class="success">{succeeded}</span> |
Failed: <span class="failed">{failed}</span> |
Pending: <span>{pending}</span></p>
<p>Fax destination: <span>{entries[0]['to']}</span></p>
<p>Report generated: <span>{datetime.now(timezone.utc).strftime('%B %d, %Y at %I:%M %p UTC')}</span></p>
</div>
<table><thead><tr>
<th>#</th><th>Date &amp; Time</th><th>Fax Number</th>
<th>Status</th><th>Confirmation ID</th><th>Error Details</th>
</tr></thead><tbody>
{rows}
</tbody></table>
<div class="footer"><p>Generated by AutoFax. Each row represents one
transmission attempt. Faxes are sent once per hour.
FAILED = the receiving fax machine did not accept.</p></div>
</body></html>"""

        (REPORTS_DIR / "fax_report.html").write_text(html)

    # ── Helpers ─────────────────────────────────────────────────────

    def update_status_display(self):
        if LOG_FILE.exists():
            try:
                entries = json.loads(LOG_FILE.read_text())
                total = len(entries)
                failed = sum(1 for e in entries if e["status"] not in ("QUEUED", "IN_PROGRESS", "COMPLETED"))
                if total > 0:
                    extra = f" | {total} sent, {failed} failed"
                    current = self.status_label.cget("text").split(" |")[0]
                    self.status_label.config(text=f"{current}{extra}")
            except Exception:
                pass

    def open_report(self):
        report = REPORTS_DIR / "fax_report.html"
        if not report.exists():
            messagebox.showinfo("No Report", "No fax attempts recorded yet.")
            return
        if sys.platform == "win32":
            os.startfile(str(report))
        elif sys.platform == "darwin":
            subprocess.run(["open", str(report)])
        else:
            subprocess.run(["xdg-open", str(report)])

    def log(self, message: str):
        timestamp = datetime.now().strftime("%H:%M:%S")
        line = f"[{timestamp}] {message}\n"

        def _append():
            self.log_text.config(state="normal")
            self.log_text.insert("end", line)
            self.log_text.see("end")
            self.log_text.config(state="disabled")

        self.root.after(0, _append)


def main():
    CLAIMS_DIR.mkdir(exist_ok=True)
    REPORTS_DIR.mkdir(exist_ok=True)

    root = tk.Tk()
    AutoFaxApp(root)
    root.mainloop()


if __name__ == "__main__":
    main()