-- Filamenteka PostgreSQL Schema

-- Enable UUID extension
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

-- Colors table
CREATE TABLE colors (
  id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
  name VARCHAR(100) NOT NULL UNIQUE,
  hex VARCHAR(7) NOT NULL,
  cena_refill INTEGER DEFAULT 3499,
  cena_spulna INTEGER DEFAULT 3999,
  created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);

-- Filaments table
CREATE TABLE filaments (
  id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
  tip VARCHAR(50) NOT NULL,
  finish VARCHAR(50) NOT NULL,
  boja VARCHAR(100) NOT NULL,
  boja_hex VARCHAR(7),
  refill INTEGER DEFAULT 0,
  spulna INTEGER DEFAULT 0,
  kolicina INTEGER DEFAULT 0,
  cena VARCHAR(50),
  created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT fk_color FOREIGN KEY (boja) REFERENCES colors(name) ON UPDATE CASCADE,
  CONSTRAINT check_kolicina CHECK (kolicina = refill + spulna)
);

-- Create indexes for better performance
CREATE INDEX idx_filaments_tip ON filaments(tip);
CREATE INDEX idx_filaments_boja ON filaments(boja);
CREATE INDEX idx_filaments_created_at ON filaments(created_at);

-- Create updated_at trigger function
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = CURRENT_TIMESTAMP;
    RETURN NEW;
END;
$$ language 'plpgsql';

-- Apply trigger to filaments table
CREATE TRIGGER update_filaments_updated_at BEFORE UPDATE
    ON filaments FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Apply trigger to colors table
CREATE TRIGGER update_colors_updated_at BEFORE UPDATE
    ON colors FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Default colors are now inserted by Bambu Lab colors migration