import { drizzle } from "drizzle-orm/better-sqlite3";
import Database from "better-sqlite3";
import * as schema from "./schema.js";
import fs from "fs";
import path from "path";
import { databaseLogger } from "../../utils/logger.js";

const dataDir = process.env.DATA_DIR || "./db/data";
const dbDir = path.resolve(dataDir);
if (!fs.existsSync(dbDir)) {
  databaseLogger.info(`Creating database directory`, {
    operation: "db_init",
    path: dbDir,
  });
  fs.mkdirSync(dbDir, { recursive: true });
}

const dbPath = path.join(dataDir, "db.sqlite");
databaseLogger.info(`Initializing SQLite database`, {
  operation: "db_init",
  path: dbPath,
});
const sqlite = new Database(dbPath);

sqlite.exec(`
    CREATE TABLE IF NOT EXISTS users (
        id TEXT PRIMARY KEY,
        username TEXT NOT NULL,
        password_hash TEXT NOT NULL,
        is_admin INTEGER NOT NULL DEFAULT 0,
        is_oidc INTEGER NOT NULL DEFAULT 0,
        client_id TEXT NOT NULL,
        client_secret TEXT NOT NULL,
        issuer_url TEXT NOT NULL,
        authorization_url TEXT NOT NULL,
        token_url TEXT NOT NULL,
        redirect_uri TEXT,
        identifier_path TEXT NOT NULL,
        name_path TEXT NOT NULL,
        scopes TEXT NOT NULL
    );

    CREATE TABLE IF NOT EXISTS settings (
        key TEXT PRIMARY KEY,
        value TEXT NOT NULL
    );

    CREATE TABLE IF NOT EXISTS ssh_data (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        name TEXT,
        ip TEXT NOT NULL,
        port INTEGER NOT NULL,
        username TEXT NOT NULL,
        folder TEXT,
        tags TEXT,
        pin INTEGER NOT NULL DEFAULT 0,
        auth_type TEXT NOT NULL,
        password TEXT,
        key TEXT,
        key_password TEXT,
        key_type TEXT,
        enable_terminal INTEGER NOT NULL DEFAULT 1,
        enable_tunnel INTEGER NOT NULL DEFAULT 1,
        tunnel_connections TEXT,
        enable_file_manager INTEGER NOT NULL DEFAULT 1,
        default_path TEXT,
        created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id)
    );

    CREATE TABLE IF NOT EXISTS file_manager_recent (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        host_id INTEGER NOT NULL,
        name TEXT NOT NULL,
        path TEXT NOT NULL,
        last_opened TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id),
        FOREIGN KEY (host_id) REFERENCES ssh_data (id)
    );

    CREATE TABLE IF NOT EXISTS file_manager_pinned (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        host_id INTEGER NOT NULL,
        name TEXT NOT NULL,
        path TEXT NOT NULL,
        pinned_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id),
        FOREIGN KEY (host_id) REFERENCES ssh_data (id)
    );

    CREATE TABLE IF NOT EXISTS file_manager_shortcuts (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        host_id INTEGER NOT NULL,
        name TEXT NOT NULL,
        path TEXT NOT NULL,
        created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id),
        FOREIGN KEY (host_id) REFERENCES ssh_data (id)
    );

    CREATE TABLE IF NOT EXISTS dismissed_alerts (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        alert_id TEXT NOT NULL,
        dismissed_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id)
    );

    CREATE TABLE IF NOT EXISTS ssh_credentials (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        user_id TEXT NOT NULL,
        name TEXT NOT NULL,
        description TEXT,
        folder TEXT,
        tags TEXT,
        auth_type TEXT NOT NULL,
        username TEXT NOT NULL,
        password TEXT,
        key TEXT,
        key_password TEXT,
        key_type TEXT,
        usage_count INTEGER NOT NULL DEFAULT 0,
        last_used TEXT,
        created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (user_id) REFERENCES users (id)
    );

    CREATE TABLE IF NOT EXISTS ssh_credential_usage (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        credential_id INTEGER NOT NULL,
        host_id INTEGER NOT NULL,
        user_id TEXT NOT NULL,
        used_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
        FOREIGN KEY (credential_id) REFERENCES ssh_credentials (id),
        FOREIGN KEY (host_id) REFERENCES ssh_data (id),
        FOREIGN KEY (user_id) REFERENCES users (id)
    );
`);

const addColumnIfNotExists = (
  table: string,
  column: string,
  definition: string,
) => {
  try {
    sqlite
      .prepare(
        `SELECT ${column}
                        FROM ${table} LIMIT 1`,
      )
      .get();
  } catch (e) {
    try {
      databaseLogger.debug(`Adding column ${column} to ${table}`, {
        operation: "schema_migration",
        table,
        column,
      });
      sqlite.exec(`ALTER TABLE ${table}
                ADD COLUMN ${column} ${definition};`);
      databaseLogger.success(`Column ${column} added to ${table}`, {
        operation: "schema_migration",
        table,
        column,
      });
    } catch (alterError) {
      databaseLogger.warn(`Failed to add column ${column} to ${table}`, {
        operation: "schema_migration",
        table,
        column,
        error: alterError,
      });
    }
  }
};

const migrateSchema = () => {
  databaseLogger.info("Checking for schema updates...", {
    operation: "schema_migration",
  });

  addColumnIfNotExists("users", "is_admin", "INTEGER NOT NULL DEFAULT 0");

  addColumnIfNotExists("users", "is_oidc", "INTEGER NOT NULL DEFAULT 0");
  addColumnIfNotExists("users", "oidc_identifier", "TEXT");
  addColumnIfNotExists("users", "client_id", "TEXT");
  addColumnIfNotExists("users", "client_secret", "TEXT");
  addColumnIfNotExists("users", "issuer_url", "TEXT");
  addColumnIfNotExists("users", "authorization_url", "TEXT");
  addColumnIfNotExists("users", "token_url", "TEXT");

  addColumnIfNotExists("users", "identifier_path", "TEXT");
  addColumnIfNotExists("users", "name_path", "TEXT");
  addColumnIfNotExists("users", "scopes", "TEXT");

  addColumnIfNotExists("users", "totp_secret", "TEXT");
  addColumnIfNotExists("users", "totp_enabled", "INTEGER NOT NULL DEFAULT 0");
  addColumnIfNotExists("users", "totp_backup_codes", "TEXT");

  addColumnIfNotExists("ssh_data", "name", "TEXT");
  addColumnIfNotExists("ssh_data", "folder", "TEXT");
  addColumnIfNotExists("ssh_data", "tags", "TEXT");
  addColumnIfNotExists("ssh_data", "pin", "INTEGER NOT NULL DEFAULT 0");
  addColumnIfNotExists(
    "ssh_data",
    "auth_type",
    'TEXT NOT NULL DEFAULT "password"',
  );
  addColumnIfNotExists("ssh_data", "password", "TEXT");
  addColumnIfNotExists("ssh_data", "key", "TEXT");
  addColumnIfNotExists("ssh_data", "key_password", "TEXT");
  addColumnIfNotExists("ssh_data", "key_type", "TEXT");
  addColumnIfNotExists(
    "ssh_data",
    "enable_terminal",
    "INTEGER NOT NULL DEFAULT 1",
  );
  addColumnIfNotExists(
    "ssh_data",
    "enable_tunnel",
    "INTEGER NOT NULL DEFAULT 1",
  );
  addColumnIfNotExists("ssh_data", "tunnel_connections", "TEXT");
  addColumnIfNotExists(
    "ssh_data",
    "enable_file_manager",
    "INTEGER NOT NULL DEFAULT 1",
  );
  addColumnIfNotExists("ssh_data", "default_path", "TEXT");
  addColumnIfNotExists(
    "ssh_data",
    "created_at",
    "TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP",
  );
  addColumnIfNotExists(
    "ssh_data",
    "updated_at",
    "TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP",
  );

  addColumnIfNotExists(
    "ssh_data",
    "credential_id",
    "INTEGER REFERENCES ssh_credentials(id)",
  );

  addColumnIfNotExists("file_manager_recent", "host_id", "INTEGER NOT NULL");
  addColumnIfNotExists("file_manager_pinned", "host_id", "INTEGER NOT NULL");
  addColumnIfNotExists("file_manager_shortcuts", "host_id", "INTEGER NOT NULL");

  databaseLogger.success("Schema migration completed", {
    operation: "schema_migration",
  });
};

const initializeDatabase = async () => {
  migrateSchema();

  try {
    const row = sqlite
      .prepare("SELECT value FROM settings WHERE key = 'allow_registration'")
      .get();
    if (!row) {
      databaseLogger.info("Initializing default settings", {
        operation: "db_init",
        setting: "allow_registration",
      });
      sqlite
        .prepare(
          "INSERT INTO settings (key, value) VALUES ('allow_registration', 'true')",
        )
        .run();
      databaseLogger.success("Default settings initialized", {
        operation: "db_init",
      });
    } else {
      databaseLogger.debug("Default settings already exist", {
        operation: "db_init",
      });
    }
  } catch (e) {
    databaseLogger.warn("Could not initialize default settings", {
      operation: "db_init",
      error: e,
    });
  }
};

initializeDatabase().catch((error) => {
  databaseLogger.error("Failed to initialize database", error, {
    operation: "db_init",
  });
  process.exit(1);
});

databaseLogger.success("Database connection established", {
  operation: "db_init",
  path: dbPath,
});
export const db = drizzle(sqlite, { schema });