CREATE TABLE IF NOT EXISTS farm_depreciation_snapshots (
    id BIGSERIAL PRIMARY KEY,
    project_flock_id BIGINT NOT NULL
        REFERENCES project_flocks(id)
        ON UPDATE CASCADE
        ON DELETE CASCADE,
    period_date DATE NOT NULL,
    depreciation_percent_effective NUMERIC(15, 6) NOT NULL DEFAULT 0,
    depreciation_value NUMERIC(18, 3) NOT NULL DEFAULT 0,
    pullet_cost_day_n_total NUMERIC(18, 3) NOT NULL DEFAULT 0,
    components JSONB NOT NULL DEFAULT '{}'::jsonb,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    CONSTRAINT farm_depreciation_snapshots_unique UNIQUE (project_flock_id, period_date)
);

CREATE INDEX IF NOT EXISTS idx_farm_depreciation_snapshots_period_date
    ON farm_depreciation_snapshots (period_date);

CREATE INDEX IF NOT EXISTS idx_farm_depreciation_snapshots_project_flock_id
    ON farm_depreciation_snapshots (project_flock_id);