-- Migration 105: Create user_files table (v0.501 C1.1)
CREATE TABLE IF NOT EXISTS user_files (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    folder_id UUID REFERENCES user_folders(id) ON DELETE SET NULL,
    filename VARCHAR(255) NOT NULL,
    s3_key VARCHAR(500) NOT NULL,
    size_bytes BIGINT NOT NULL DEFAULT 0,
    mime_type VARCHAR(100) NOT NULL DEFAULT 'application/octet-stream',
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
);

CREATE INDEX idx_user_files_user_id ON user_files(user_id);
CREATE INDEX idx_user_files_folder_id ON user_files(folder_id);
CREATE INDEX idx_user_files_mime_type ON user_files(mime_type);