"""
CFTC COT Ingestion CLI

Usage:
    python -m app.ingestion.cli init-db
    python -m app.ingestion.cli import-local-html [--data-dir ./data]
    python -m app.ingestion.cli import-history [--start-year 1995] [--end-year 2026]
    python -m app.ingestion.cli import-html <file.htm>
    python -m app.ingestion.cli import-zip <file.zip>
    python -m app.ingestion.cli download-and-import
    python -m app.ingestion.cli status
"""

import argparse
import sys
from pathlib import Path


def cmd_init_db(args):
    from app.db import init_db
    init_db()


def cmd_import_local_html(args):
    from app.ingestion.importer import import_html_file
    data_dir = Path(args.data_dir)
    files = sorted(data_dir.glob("*_deacbtlof.htm"))
    if not files:
        print(f"No HTML files found in {data_dir}")
        return
    total_inserted = total_skipped = 0
    for f in files:
        result = import_html_file(str(f))
        status = f"ERROR: {result.error}" if result.error else "OK"
        print(f"  {f.name}: {result.rows_inserted} inserted, {result.rows_skipped} skipped — {status}")
        total_inserted += result.rows_inserted
        total_skipped += result.rows_skipped
    print(f"\nTotal: {total_inserted} inserted, {total_skipped} skipped")


def cmd_import_history(args):
    from app.ingestion.importer import run_historical_import
    print(f"Importing historical data {args.start_year}–{args.end_year}...")
    run_historical_import(start_year=args.start_year, end_year=args.end_year, verbose=True)
    print("Done.")


def cmd_import_html(args):
    from app.ingestion.importer import import_html_file
    result = import_html_file(args.file)
    if result.error:
        print(f"Error: {result.error}", file=sys.stderr)
        sys.exit(1)
    print(f"{result.rows_inserted} inserted, {result.rows_skipped} skipped")


def cmd_import_zip(args):
    from app.ingestion.importer import import_zip_file
    result = import_zip_file(args.file)
    if result.error:
        print(f"Error: {result.error}", file=sys.stderr)
        sys.exit(1)
    print(f"{result.rows_inserted} inserted, {result.rows_skipped} skipped")


def cmd_download_and_import(args):
    from app.ingestion.importer import download_and_import
    result = download_and_import()
    if result.error:
        print(f"Error: {result.error}", file=sys.stderr)
        sys.exit(1)
    print(f"Source: {result.source}")
    print(f"{result.rows_inserted} inserted, {result.rows_skipped} skipped")


def cmd_status(args):
    from app.db import get_db
    with get_db() as conn:
        # Summary counts
        row = conn.execute("SELECT COUNT(*) FROM commodities").fetchone()
        print(f"Commodities: {row[0]}")
        row = conn.execute("SELECT COUNT(DISTINCT report_date) FROM reports").fetchone()
        print(f"Report dates: {row[0]}")
        row = conn.execute("SELECT COUNT(*) FROM positions").fetchone()
        print(f"Position rows: {row[0]}")
        row = conn.execute("SELECT MIN(report_date), MAX(report_date) FROM reports").fetchone()
        print(f"Date range: {row[0]} to {row[1]}")

        # Exchanges
        print("\nBy exchange:")
        for r in conn.execute(
            "SELECT exchange_abbr, COUNT(*) FROM commodities GROUP BY exchange_abbr ORDER BY COUNT(*) DESC"
        ):
            print(f"  {r[0]}: {r[1]} markets")

        # Import log
        print("\nImport log (last 10):")
        for r in conn.execute(
            "SELECT source, status, rows_inserted, rows_skipped, completed_at "
            "FROM import_log ORDER BY id DESC LIMIT 10"
        ):
            print(f"  {r['source']}: {r['status']} — "
                  f"{r['rows_inserted']} inserted, {r['rows_skipped']} skipped "
                  f"({r['completed_at']})")


def main():
    parser = argparse.ArgumentParser(description="CFTC COT data ingestion CLI")
    sub = parser.add_subparsers(dest="command", required=True)

    sub.add_parser("init-db", help="Initialize the database schema")

    p = sub.add_parser("import-local-html", help="Import all local HTML files")
    p.add_argument("--data-dir", default="data", help="Directory with HTML files")

    p = sub.add_parser("import-history", help="Download and import full historical archive")
    p.add_argument("--start-year", type=int, default=1995)
    p.add_argument("--end-year", type=int, default=2026)

    p = sub.add_parser("import-html", help="Import a single HTML file")
    p.add_argument("file")

    p = sub.add_parser("import-zip", help="Import a single ZIP file")
    p.add_argument("file")

    sub.add_parser("download-and-import", help="Download latest weekly report and import it")
    sub.add_parser("status", help="Show database statistics")

    args = parser.parse_args()
    commands = {
        "init-db": cmd_init_db,
        "import-local-html": cmd_import_local_html,
        "import-history": cmd_import_history,
        "import-html": cmd_import_html,
        "import-zip": cmd_import_zip,
        "download-and-import": cmd_download_and_import,
        "status": cmd_status,
    }
    commands[args.command](args)


if __name__ == "__main__":
    main()