-- Captain Claude Mobile - PostgreSQL Schema
-- Database: captain_mobile

-- Create user and database if not exists (run as postgres superuser)
-- CREATE USER captain WITH PASSWORD 'captain';
-- CREATE DATABASE captain_mobile OWNER captain;
-- GRANT ALL PRIVILEGES ON DATABASE captain_mobile TO captain;

-- Tables for conversation history
CREATE TABLE IF NOT EXISTS conversations (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id VARCHAR(255) NOT NULL,
    title VARCHAR(500),
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS messages (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    conversation_id UUID REFERENCES conversations(id) ON DELETE CASCADE,
    role VARCHAR(50) NOT NULL,  -- 'user' or 'assistant'
    content TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT NOW()
);

-- Indexes
CREATE INDEX IF NOT EXISTS idx_messages_conversation ON messages(conversation_id);
CREATE INDEX IF NOT EXISTS idx_conversations_user ON conversations(user_id);
CREATE INDEX IF NOT EXISTS idx_conversations_updated ON conversations(updated_at DESC);

-- File attachments tracking (optional)
CREATE TABLE IF NOT EXISTS attachments (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    message_id UUID REFERENCES messages(id) ON DELETE CASCADE,
    filename VARCHAR(500) NOT NULL,
    file_path VARCHAR(1000) NOT NULL,
    mime_type VARCHAR(100),
    size_bytes BIGINT,
    created_at TIMESTAMP DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_attachments_message ON attachments(message_id);