-- ============================================
-- SCHEMA DO BANCO DE DADOS - SOPHIA
-- ============================================

CREATE DATABASE IF NOT EXISTS sophia_db CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
USE sophia_db;

-- Tabela de Usuários
CREATE TABLE IF NOT EXISTS users (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    email VARCHAR(255) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de Personas
CREATE TABLE IF NOT EXISTS personas (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    function VARCHAR(255) COMMENT 'Função da persona (ex: especialista em vendas)',
    tone VARCHAR(255) COMMENT 'Tom de voz',
    rules TEXT COMMENT 'Regras do que pode e não pode responder',
    system_prompt TEXT COMMENT 'Prompt base (System Prompt)',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    INDEX idx_user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de Bases de Conhecimento
CREATE TABLE IF NOT EXISTS knowledge_bases (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    description TEXT,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    INDEX idx_user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de Conteúdos das Bases de Conhecimento
CREATE TABLE IF NOT EXISTS knowledge_contents (
    id INT AUTO_INCREMENT PRIMARY KEY,
    knowledge_base_id INT NOT NULL,
    content TEXT NOT NULL,
    file_name VARCHAR(255) NULL COMMENT 'Nome do arquivo se foi upload',
    file_path VARCHAR(500) NULL COMMENT 'Caminho do arquivo se foi upload',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (knowledge_base_id) REFERENCES knowledge_bases(id) ON DELETE CASCADE,
    INDEX idx_knowledge_base_id (knowledge_base_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de IAs (Instâncias de IA/Chats)
CREATE TABLE IF NOT EXISTS ais (
    id INT AUTO_INCREMENT PRIMARY KEY,
    user_id INT NOT NULL,
    name VARCHAR(255) NOT NULL,
    persona_id INT NULL,
    knowledge_base_id INT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    FOREIGN KEY (persona_id) REFERENCES personas(id) ON DELETE SET NULL,
    FOREIGN KEY (knowledge_base_id) REFERENCES knowledge_bases(id) ON DELETE SET NULL,
    INDEX idx_user_id (user_id),
    INDEX idx_persona_id (persona_id),
    INDEX idx_knowledge_base_id (knowledge_base_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de Chats (Histórico de conversas)
CREATE TABLE IF NOT EXISTS chats (
    id INT AUTO_INCREMENT PRIMARY KEY,
    ai_id INT NOT NULL,
    user_id INT NOT NULL,
    title VARCHAR(255) NULL COMMENT 'Título da conversa (gerado automaticamente)',
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    FOREIGN KEY (ai_id) REFERENCES ais(id) ON DELETE CASCADE,
    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    INDEX idx_ai_id (ai_id),
    INDEX idx_user_id (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- Tabela de Mensagens do Chat
CREATE TABLE IF NOT EXISTS chat_messages (
    id INT AUTO_INCREMENT PRIMARY KEY,
    chat_id INT NOT NULL,
    role ENUM('user', 'assistant') NOT NULL,
    content TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    FOREIGN KEY (chat_id) REFERENCES chats(id) ON DELETE CASCADE,
    INDEX idx_chat_id (chat_id),
    INDEX idx_created_at (created_at)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;