ormada-cli 0.1.0

//! Database introspection for comparing against models

#![allow(dead_code)] // Trait kept for future introspection commands

use anyhow::Result;
use ormada_schema::TableSchema;

/// Database introspector trait
pub trait DatabaseIntrospector {
    /// Get all table names in the database
    fn get_tables(&self) -> Result<Vec<String>>;

    /// Get schema for a specific table
    fn get_table_schema(&self, table: &str) -> Result<TableSchema>;

    /// Get all table schemas
    fn get_all_schemas(&self) -> Result<Vec<TableSchema>> {
        let tables = self.get_tables()?;
        tables.iter().map(|t| self.get_table_schema(t)).collect()
    }
}

/// PostgreSQL introspector
pub struct PostgresIntrospector {
    // Connection would go here
}

impl PostgresIntrospector {
    /// Create a new PostgreSQL introspector
    #[allow(dead_code)]
    pub fn new(_connection_string: &str) -> Result<Self> {
        // TODO: Establish connection
        Ok(Self {})
    }
}

impl DatabaseIntrospector for PostgresIntrospector {
    fn get_tables(&self) -> Result<Vec<String>> {
        // TODO: Query information_schema.tables
        // SELECT table_name FROM information_schema.tables
        // WHERE table_schema = 'public' AND table_type = 'BASE TABLE'
        Ok(Vec::new())
    }

    fn get_table_schema(&self, table: &str) -> Result<TableSchema> {
        // TODO: Query information_schema for columns, indexes, constraints
        Ok(TableSchema::new(table))
    }
}

/// SQLite introspector
pub struct SqliteIntrospector {
    // Connection would go here
}

impl SqliteIntrospector {
    /// Create a new SQLite introspector
    #[allow(dead_code)]
    pub fn new(_path: &str) -> Result<Self> {
        Ok(Self {})
    }
}

impl DatabaseIntrospector for SqliteIntrospector {
    fn get_tables(&self) -> Result<Vec<String>> {
        // TODO: Query sqlite_master
        // SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'
        Ok(Vec::new())
    }

    fn get_table_schema(&self, table: &str) -> Result<TableSchema> {
        // TODO: Use PRAGMA table_info, PRAGMA index_list, PRAGMA foreign_key_list
        Ok(TableSchema::new(table))
    }
}

/// Create an introspector based on database URL
#[allow(dead_code)]
pub fn create_introspector(database_url: &str) -> Result<Box<dyn DatabaseIntrospector>> {
    if database_url.starts_with("postgres://") || database_url.starts_with("postgresql://") {
        Ok(Box::new(PostgresIntrospector::new(database_url)?))
    } else if database_url.starts_with("sqlite://") || database_url.ends_with(".db") {
        Ok(Box::new(SqliteIntrospector::new(database_url)?))
    } else {
        anyhow::bail!("Unsupported database URL: {}", database_url)
    }
}