#!/usr/bin/env python3
"""Import applications data from original ShopDB MySQL database."""

import os
import sys
import pymysql
from dotenv import load_dotenv

# Add project to path
sys.path.insert(0, '/home/camp/projects/shopdb-flask')

# Load environment variables
load_dotenv('/home/camp/projects/shopdb-flask/.env')

# Source MySQL connection (original shopdb)
MYSQL_CONFIG = {
    'host': '127.0.0.1',
    'port': 3306,
    'user': 'root',
    'password': 'rootpassword',
    'database': 'shopdb',
    'charset': 'utf8mb4',
    'cursorclass': pymysql.cursors.DictCursor
}


def get_mysql_connection():
    """Get MySQL connection to source database."""
    return pymysql.connect(**MYSQL_CONFIG)


def to_bool(val):
    """Convert MySQL bit field to Python bool."""
    if val is None:
        return False
    if isinstance(val, bytes):
        return val != b'\x00'
    return bool(val)


def import_appowners(mysql_conn, db, AppOwner):
    """Import app owners from MySQL."""
    print("Importing app owners...")
    cursor = mysql_conn.cursor()
    cursor.execute("SELECT * FROM appowners WHERE isactive = 1")
    owners = cursor.fetchall()

    count = 0
    for o in owners:
        existing = AppOwner.query.filter_by(appownerid=o['appownerid']).first()
        if not existing:
            owner = AppOwner(
                appownerid=o['appownerid'],
                appowner=o['appowner'],
                sso=o.get('sso'),
                isactive=True
            )
            db.session.add(owner)
            count += 1

    db.session.commit()
    print(f"  Imported {count} app owners")
    return count


def import_supportteams(mysql_conn, db, SupportTeam):
    """Import support teams from MySQL."""
    print("Importing support teams...")
    cursor = mysql_conn.cursor()
    # Note: source table has typo 'supporteamid' instead of 'supportteamid'
    cursor.execute("SELECT supporteamid as supportteamid, teamname, teamurl, appownerid, isactive FROM supportteams WHERE isactive = 1")
    teams = cursor.fetchall()

    count = 0
    for t in teams:
        existing = SupportTeam.query.filter_by(supportteamid=t['supportteamid']).first()
        if not existing:
            team = SupportTeam(
                supportteamid=t['supportteamid'],
                teamname=t['teamname'],
                teamurl=t.get('teamurl'),
                appownerid=t.get('appownerid'),
                isactive=True
            )
            db.session.add(team)
            count += 1

    db.session.commit()
    print(f"  Imported {count} support teams")
    return count


def import_applications(mysql_conn, db, Application):
    """Import applications from MySQL."""
    print("Importing applications...")
    cursor = mysql_conn.cursor()
    cursor.execute("""
        SELECT a.*, st.supporteamid as supportteamid
        FROM applications a
        LEFT JOIN supportteams st ON a.supportteamid = st.supporteamid
        WHERE a.isactive = 1
    """)
    apps = cursor.fetchall()

    count = 0
    skipped_dupes = 0
    seen_names = set()
    for a in apps:
        # Skip duplicate appnames (source has some)
        if a['appname'] in seen_names:
            skipped_dupes += 1
            continue
        seen_names.add(a['appname'])

        existing = Application.query.filter_by(appname=a['appname']).first()
        if not existing:
            app = Application(
                appid=a['appid'],
                appname=a['appname'],
                appdescription=a.get('appdescription'),
                supportteamid=a.get('supportteamid'),
                isinstallable=to_bool(a.get('isinstallable')),
                applicationnotes=a.get('applicationnotes'),
                installpath=a.get('installpath'),
                applicationlink=a.get('applicationlink'),
                documentationpath=a.get('documentationpath'),
                ishidden=to_bool(a.get('ishidden')),
                isprinter=to_bool(a.get('isprinter')),
                islicenced=to_bool(a.get('islicenced')),
                image=a.get('image'),
                isactive=True
            )
            db.session.add(app)
            count += 1

    db.session.commit()
    print(f"  Imported {count} applications (skipped {skipped_dupes} duplicates)")
    return count


def import_appversions(mysql_conn, db, AppVersion, Application):
    """Import application versions from MySQL."""
    print("Importing app versions...")
    cursor = mysql_conn.cursor()
    cursor.execute("""
        SELECT av.*, a.appname
        FROM appversions av
        JOIN applications a ON av.appid = a.appid
        WHERE av.isactive = 1
    """)
    versions = cursor.fetchall()

    # Build app lookup by name (since we may have different IDs)
    app_map = {a.appname: a.appid for a in Application.query.all()}

    count = 0
    skipped = 0
    for v in versions:
        # Look up app by name
        new_appid = app_map.get(v['appname'])
        if not new_appid:
            skipped += 1
            continue

        existing = AppVersion.query.filter_by(
            appid=new_appid,
            version=v['version']
        ).first()

        if not existing:
            version = AppVersion(
                appversionid=v['appversionid'],
                appid=new_appid,
                version=v['version'],
                releasedate=v.get('releasedate'),
                notes=v.get('notes'),
                isactive=True
            )
            db.session.add(version)
            count += 1

    db.session.commit()
    print(f"  Imported {count} app versions (skipped {skipped})")
    return count


def import_installedapps(mysql_conn, db, InstalledApp, Machine, Application, AppVersion):
    """Import installed apps (PC-application relationships) from MySQL."""
    print("Importing installed apps...")
    cursor = mysql_conn.cursor()
    cursor.execute("""
        SELECT ia.*, m.machinenumber, a.appname, av.version as version_str
        FROM installedapps ia
        JOIN machines m ON ia.machineid = m.machineid
        JOIN applications a ON ia.appid = a.appid
        LEFT JOIN appversions av ON ia.appversionid = av.appversionid
        WHERE ia.isactive = 1
    """)
    installed = cursor.fetchall()

    # Build lookup for machines by machinenumber (since IDs may differ)
    machine_map = {m.machinenumber: m.machineid for m in Machine.query.all()}
    # Build app lookup by name
    app_map = {a.appname: a.appid for a in Application.query.all()}
    # Build version lookup by (appid, version)
    version_map = {(v.appid, v.version): v.appversionid for v in AppVersion.query.all()}

    count = 0
    skipped = 0
    for i in installed:
        # Look up machine by machinenumber
        new_machineid = machine_map.get(i['machinenumber'])
        if not new_machineid:
            skipped += 1
            continue

        # Look up app by name
        new_appid = app_map.get(i['appname'])
        if not new_appid:
            skipped += 1
            continue

        # Look up version if exists
        new_versionid = None
        if i.get('version_str'):
            new_versionid = version_map.get((new_appid, i['version_str']))

        # Check if already exists
        existing = InstalledApp.query.filter_by(
            machineid=new_machineid,
            appid=new_appid
        ).first()

        if not existing:
            installed_app = InstalledApp(
                machineid=new_machineid,
                appid=new_appid,
                appversionid=new_versionid,
                isactive=True
            )
            db.session.add(installed_app)
            count += 1
        elif new_versionid and not existing.appversionid:
            # Update existing with version if we now have it
            existing.appversionid = new_versionid
            count += 1

    db.session.commit()
    print(f"  Imported {count} installed apps (skipped {skipped})")
    return count


def import_knowledgebase(mysql_conn, db, KnowledgeBase, Application):
    """Import knowledge base articles from MySQL."""
    print("Importing knowledge base articles...")
    cursor = mysql_conn.cursor()
    cursor.execute("""
        SELECT kb.*, a.appname
        FROM knowledgebase kb
        LEFT JOIN applications a ON kb.appid = a.appid
        WHERE kb.isactive = 1
    """)
    articles = cursor.fetchall()

    # Build app lookup by name
    app_map = {a.appname: a.appid for a in Application.query.all()}

    count = 0
    skipped = 0
    for article in articles:
        existing = KnowledgeBase.query.filter_by(linkid=article['linkid']).first()
        if not existing:
            # Look up app by name if exists
            new_appid = None
            if article.get('appname'):
                new_appid = app_map.get(article['appname'])

            kb = KnowledgeBase(
                linkid=article['linkid'],
                appid=new_appid,
                shortdescription=article.get('shortdescription'),
                linkurl=article.get('linkurl'),
                keywords=article.get('keywords'),
                clicks=article.get('clicks') or 0,
                isactive=True
            )
            db.session.add(kb)
            count += 1
        else:
            skipped += 1

    db.session.commit()
    print(f"  Imported {count} knowledge base articles (skipped {skipped} existing)")
    return count


def main():
    """Main import function."""
    print("=" * 60)
    print("ShopDB Applications Import")
    print("=" * 60)

    from shopdb import create_app
    from shopdb.extensions import db
    from shopdb.core.models import Application, AppOwner, SupportTeam, AppVersion, InstalledApp, Machine, KnowledgeBase

    app = create_app()

    with app.app_context():
        # Create any missing tables
        print("\nCreating tables if needed...")
        db.create_all()

        print("\nConnecting to MySQL...")
        mysql_conn = get_mysql_connection()
        print("  Connected!")

        try:
            print("\n--- Application Data ---")
            import_appowners(mysql_conn, db, AppOwner)
            import_supportteams(mysql_conn, db, SupportTeam)
            import_applications(mysql_conn, db, Application)
            import_appversions(mysql_conn, db, AppVersion, Application)

            print("\n--- PC-Application Relationships ---")
            import_installedapps(mysql_conn, db, InstalledApp, Machine, Application, AppVersion)

            print("\n--- Knowledge Base ---")
            import_knowledgebase(mysql_conn, db, KnowledgeBase, Application)

            print("\n" + "=" * 60)
            print("Import complete!")
            print("=" * 60)

        finally:
            mysql_conn.close()


if __name__ == '__main__':
    main()