#!/usr/bin/env python3
"""
Stampli Bulk Pay Date Editor (CLI)

Usage:
    python edit_pay_dates.py --dry-run
    python edit_pay_dates.py
    python edit_pay_dates.py --filter-only
    python edit_pay_dates.py --inspect
"""

import argparse
from pathlib import Path
from playwright.sync_api import sync_playwright

from stampli_core import (
    load_config,
    active_page,
    launch_browser,
    navigate,
    wait_for_login,
    needs_login,
    collect_edit_rows,
    compute_changes,
    apply_edits,
    filter_select_and_pay,
    ROW_SELECTOR,
    EDIT_COLUMNS,
)


def inspect_mode(browser):
    print("\n" + "=" * 60)
    print("INSPECT MODE")
    print("=" * 60)
    print("""
Type 'snap' to save page HTML, 'scan' to preview rows, 'done' to exit.
""")

    while True:
        cmd = input(">>> ").strip().lower()
        page = active_page(browser)
        try:
            if cmd == "snap":
                html = page.content()
                snap_path = Path(__file__).parent / "page_snapshot.html"
                with open(snap_path, "w") as f:
                    f.write(html)
                print(f"Saved page HTML to {snap_path}")
            elif cmd == "scan":
                rows = page.query_selector_all(ROW_SELECTOR)
                print(f"Found {len(rows)} rendered rows (virtual scroll)")
                for i, row in enumerate(rows[:10]):
                    due_cell = row.query_selector(EDIT_COLUMNS["due"])
                    pay_cell = row.query_selector(EDIT_COLUMNS["pay"])
                    due_text = (
                        due_cell.inner_text().strip().split("\n")[0]
                        if due_cell
                        else "?"
                    )
                    pay_text = (
                        pay_cell.inner_text().strip().split("\n")[0]
                        if pay_cell
                        else "?"
                    )
                    vendor_cell = row.query_selector(EDIT_COLUMNS["vendor"])
                    vendor = (
                        vendor_cell.inner_text().strip()[:30] if vendor_cell else "?"
                    )
                    inv_cell = row.query_selector(EDIT_COLUMNS["invoice"])
                    inv = inv_cell.inner_text().strip()[:20] if inv_cell else "?"
                    print(
                        f"  Row {i}: inv={inv} vendor={vendor} due={due_text} pay={pay_text}"
                    )
            elif cmd == "columns":
                headers = page.query_selector_all("[role='columnheader']")
                for i, h in enumerate(headers):
                    field = h.get_attribute("data-field") or ""
                    text = h.inner_text().strip().replace("\n", " ")[:40]
                    print(f"  Col {i}: field={field:30s} label='{text}'")
            elif cmd in ("done", "quit", "exit", ""):
                break
            else:
                print("Commands: snap, scan, columns, done")
        except Exception as e:
            print(f"Error (page may have changed): {e}")


def bulk_edit(page, config, dry_run=False):
    date_fmt = config["date_format"]
    days_before = config["days_before_due"]

    print("\nScanning all rows (scrolling through virtual grid)...")
    all_rows = collect_edit_rows(page, on_progress=lambda n: None)
    print(f"Found {len(all_rows)} total rows")

    changes = compute_changes(all_rows, date_fmt, days_before)

    if not changes:
        print("\nAll rows already have correct pay dates. Nothing to do.")
        return

    print(f"\n{'DRY RUN: ' if dry_run else ''}{len(changes)} rows to update:\n")
    print(
        f"  {'Invoice':<20s} {'Vendor':<30s} {'Amount':<12s} {'Due':<12s} {'Current Pay':<16s} {'New Pay':<12s}"
    )
    print(f"  {'-' * 20} {'-' * 30} {'-' * 12} {'-' * 12} {'-' * 16} {'-' * 12}")
    for c in changes:
        print(
            f"  {c['invoice']:<20s} {c['vendor']:<30s} {c.get('amount', ''):<12s} {c['due_text']:<12s} "
            f"{c['pay_text'] or '(empty)':<16s} {c['new_pay']:<12s}"
        )

    if dry_run:
        return

    confirm = input(f"\nProceed with {len(changes)} updates? [y/N]: ").strip().lower()
    if confirm != "y":
        print("Aborted.")
        return

    def on_progress(i, total, inv, ok, info=""):
        if i == -1:
            prefix = "  RETRY"
        else:
            prefix = f"  [{i}/{total}]"
        status = "Updated" if ok else "MISSED"
        print(f"{prefix} {status} {inv} {info}")

    success, failed = apply_edits(page, changes, on_progress=on_progress)
    print(f"\nDone: {success}/{len(changes)} rows updated.")

    if success > 0:
        submit = (
            input(
                "\nFilter to error-free rows, select all, and click Pay Invoices? [y/N]: "
            )
            .strip()
            .lower()
        )
        if submit == "y":
            filter_select_and_pay(page, on_status=print)


def main():
    parser = argparse.ArgumentParser(description="Stampli Bulk Pay Date Editor")
    parser.add_argument("--inspect", action="store_true")
    parser.add_argument("--dry-run", action="store_true")
    parser.add_argument("--filter-only", action="store_true")
    parser.add_argument("--url", type=str)
    args = parser.parse_args()

    config = load_config()
    url = args.url or config["stampli_url"]

    with sync_playwright() as p:
        browser = launch_browser(p)
        navigate(browser, url)

        import time

        time.sleep(3)
        page = active_page(browser)
        if needs_login(page):
            if not wait_for_login(browser, on_status=print):
                browser.close()
                return

        print("Waiting for page to settle...")
        time.sleep(3)

        if args.inspect:
            inspect_mode(browser)
        elif args.filter_only:
            page = active_page(browser)
            filter_select_and_pay(page, on_status=print)
        else:
            page = active_page(browser)
            bulk_edit(page, config, dry_run=args.dry_run)

        input("\nPress Enter to close the browser...")
        browser.close()


if __name__ == "__main__":
    main()