-- Migration: 003 - Criar tabela de filamentos

CREATE TABLE filaments (
    id               UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    user_id          UUID NOT NULL REFERENCES users (id) ON DELETE CASCADE,
    material         TEXT NOT NULL,
    brand            TEXT NOT NULL,
    model            TEXT,
    color_hex        TEXT NOT NULL,
    spool_preset_id  UUID NOT NULL REFERENCES spool_presets (id),
    total_weight_g   INTEGER NOT NULL CHECK (total_weight_g > 0),
    net_weight_g     INTEGER NOT NULL CHECK (net_weight_g >= 0),
    temp_hotend_c    INTEGER CHECK (temp_hotend_c > 0),
    temp_bed_c       INTEGER CHECK (temp_bed_c >= 0),
    flow_factor_pct  DOUBLE PRECISION CHECK (flow_factor_pct > 0),
    notes            TEXT,
    updated_at       TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    created_at       TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX idx_filaments_user_id   ON filaments (user_id);
CREATE INDEX idx_filaments_material  ON filaments (user_id, material);
CREATE INDEX idx_filaments_brand     ON filaments (user_id, brand);
CREATE INDEX idx_filaments_updated_at ON filaments (user_id, updated_at DESC);
-- Índice para suporte a alertas de estoque baixo
CREATE INDEX idx_filaments_net_weight ON filaments (user_id, net_weight_g);