-- Create media_folders table for organizing uploads
CREATE TABLE IF NOT EXISTS media_folders (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    parent_id INTEGER REFERENCES media_folders(id) ON DELETE CASCADE,
    path VARCHAR(1000) NOT NULL, -- Full path like /folder1/subfolder2
    created_by INTEGER,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    UNIQUE(parent_id, name) -- Prevent duplicate folder names in same parent
);

-- Add folder_id to uploads table
ALTER TABLE uploads ADD COLUMN IF NOT EXISTS folder_id INTEGER REFERENCES media_folders(id) ON DELETE SET NULL;

-- Create indexes for faster queries
CREATE INDEX IF NOT EXISTS idx_media_folders_parent_id ON media_folders(parent_id);
CREATE INDEX IF NOT EXISTS idx_media_folders_path ON media_folders(path);
CREATE INDEX IF NOT EXISTS idx_uploads_folder_id ON uploads(folder_id);

-- Add is_folder and folder_name columns to handle folder-like behavior
ALTER TABLE uploads ADD COLUMN IF NOT EXISTS is_folder BOOLEAN DEFAULT FALSE;

COMMENT ON TABLE media_folders IS 'Organizes uploaded media files into folders/directories';
COMMENT ON COLUMN media_folders.name IS 'Folder name (not full path)';
COMMENT ON COLUMN media_folders.parent_id IS 'Parent folder ID for nested folders, NULL for root';
COMMENT ON COLUMN media_folders.path IS 'Full path from root (e.g., /photos/2024)';
COMMENT ON COLUMN uploads.folder_id IS 'Folder containing this file, NULL for root';