#!/usr/bin/env python3
"""Migrate old config.cfg to SQLite database."""

import re
import sys
from configparser import ConfigParser
from database import init_db, get_db, set_setting


def parse_color(value):
    """Parse 'R=255&G=0&B=0' or '/win&A=255&R=200&G=200&B=200' into (r, g, b, effect)."""
    effect = ""
    # Extract effect prefix (e.g., /win&A=255)
    if value.startswith("/"):
        parts = value.split("&R=")
        if len(parts) == 2:
            effect = parts[0]
            value = "R=" + parts[1]

    r = g = b = 0
    for part in value.replace("&", " ").split():
        if part.startswith("R="):
            r = int(part[2:])
        elif part.startswith("G="):
            g = int(part[2:])
        elif part.startswith("B="):
            b = int(part[2:])
    return r, g, b, effect


def migrate(config_path="config.cfg"):
    """Import old config.cfg into the SQLite database."""
    config = ConfigParser()
    config.read(config_path, encoding="utf-8")

    init_db()
    conn = get_db()

    # Azure settings
    if config.has_section("azure"):
        az = config["azure"]
        set_setting("azure_client_id", az.get("clientid", ""))
        set_setting("azure_client_secret", az.get("clientsecret", ""))
        set_setting("azure_tenant_id", az.get("tenantid", ""))
        set_setting("azure_auth_tenant", az.get("authtenant", "common"))
        set_setting("azure_scopes", az.get("graphuserscopes", ""))

    # Auth record
    if config.has_option("cred", "value"):
        set_setting("azure_auth_record", config["cred"]["value"])

    # Config settings
    if config.has_section("config"):
        cfg = config["config"]
        set_setting("poll_interval", cfg.get("intervall", "15"))
        set_setting("aida_csv_path", cfg.get("anwesenheit_csv", ""))
        set_setting("aida_status_anwesend", cfg.get("anwesenheit_anwesend", "~~1~~"))
        set_setting("aida_status_abwesend", cfg.get("anwesenheit_abwesend", "~~0~~"))
        set_setting("aida_status_homeoffice", cfg.get("anwesenheit_homeoffice", "~~2~~"))

    # WLED color rules
    if config.has_section("wled"):
        for status, value in config["wled"].items():
            r, g, b, effect = parse_color(value)
            conn.execute(
                """INSERT OR REPLACE INTO color_rules (status, r, g, b, effect)
                   VALUES (?, ?, ?, ?, ?)""",
                (status, r, g, b, effect),
            )

    # Users and WLED devices
    devices = {}  # hostname -> device_id
    if config.has_section("user"):
        for azure_id, entry in config["user"].items():
            parts = entry.split(" - ", 1)
            hostname = parts[0].strip()
            display_name = parts[1].strip() if len(parts) > 1 else ""

            # Get personal number from anwesenheit section
            personal_nr = ""
            if config.has_option("anwesenheit", azure_id):
                anw_val = config["anwesenheit"][azure_id].split()[0]
                personal_nr = anw_val

            # Determine if user is active (has a known hostname)
            is_active = 0 if hostname == "unbekannt" else 1

            conn.execute(
                """INSERT OR REPLACE INTO users (azure_id, display_name, personal_nr, active)
                   VALUES (?, ?, ?, ?)""",
                (azure_id, display_name, personal_nr, is_active),
            )

            # Create WLED device if hostname is known
            if hostname != "unbekannt" and hostname not in devices:
                conn.execute(
                    "INSERT OR IGNORE INTO wled_devices (hostname, name, segment_count) VALUES (?, ?, 2)",
                    (hostname, hostname),
                )
                row = conn.execute(
                    "SELECT id FROM wled_devices WHERE hostname = ?", (hostname,)
                ).fetchone()
                if row:
                    devices[hostname] = row["id"]

    # Segment assignments
    if config.has_section("segment"):
        for azure_id, entry in config["segment"].items():
            parts = entry.split()
            seg_str = parts[0] if parts else "-"
            if seg_str == "-":
                continue

            try:
                segment = int(seg_str)
            except ValueError:
                continue

            # Find the user's hostname
            if config.has_option("user", azure_id):
                user_entry = config["user"][azure_id]
                hostname = user_entry.split(" - ", 1)[0].strip()
                if hostname in devices:
                    device_id = devices[hostname]
                    conn.execute(
                        """INSERT OR REPLACE INTO assignments
                           (user_azure_id, wled_device_id, segment)
                           VALUES (?, ?, ?)""",
                        (azure_id, device_id, segment),
                    )

    conn.commit()
    conn.close()
    print(f"Migration abgeschlossen.")
    print(f"  - {len(devices)} WLED-Geraete importiert")

    conn = get_db()
    user_count = conn.execute("SELECT COUNT(*) as c FROM users").fetchone()["c"]
    active_count = conn.execute("SELECT COUNT(*) as c FROM users WHERE active=1").fetchone()["c"]
    assign_count = conn.execute("SELECT COUNT(*) as c FROM assignments").fetchone()["c"]
    conn.close()
    print(f"  - {user_count} User importiert ({active_count} aktiv)")
    print(f"  - {assign_count} Segment-Zuordnungen importiert")


if __name__ == "__main__":
    path = sys.argv[1] if len(sys.argv) > 1 else "config.cfg"
    migrate(path)