Add new schemas and scripts for calculate

inventory-server/db/config-schema-new.sql

@@ -0,0 +1,113 @@
+-- Drop tables in reverse order of dependency
+DROP TABLE IF EXISTS public.settings_product CASCADE;
+DROP TABLE IF EXISTS public.settings_vendor CASCADE;
+DROP TABLE IF EXISTS public.settings_global CASCADE;
+
+-- Table Definition: settings_global
+CREATE TABLE public.settings_global (
+    setting_key VARCHAR PRIMARY KEY,
+    setting_value VARCHAR NOT NULL,
+    description TEXT,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Table Definition: settings_vendor
+CREATE TABLE public.settings_vendor (
+    vendor VARCHAR PRIMARY KEY, -- Matches products.vendor
+    default_lead_time_days INT,
+    default_days_of_stock INT,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+-- Index for faster lookups if needed (PK usually sufficient)
+-- CREATE INDEX idx_settings_vendor_vendor ON public.settings_vendor(vendor);
+
+-- Table Definition: settings_product
+CREATE TABLE public.settings_product (
+    pid INT8 PRIMARY KEY,
+    lead_time_days INT, -- Overrides vendor/global
+    days_of_stock INT, -- Overrides vendor/global
+    safety_stock INT DEFAULT 0, -- Minimum desired stock level
+    forecast_method VARCHAR DEFAULT 'standard', -- e.g., 'standard', 'seasonal'
+    exclude_from_forecast BOOLEAN DEFAULT FALSE,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT fk_settings_product_pid FOREIGN KEY (pid) REFERENCES public.products(pid) ON DELETE CASCADE ON UPDATE CASCADE
+);
+
+
+-- Description: Inserts or updates standard default global settings.
+--              Safe to rerun; will update existing keys with these default values.
+-- Dependencies: `settings_global` table must exist.
+-- Frequency: Run once initially, or rerun if you want to reset global defaults.
+
+INSERT INTO public.settings_global (setting_key, setting_value, description) VALUES
+    ('abc_revenue_threshold_a', '0.80', 'Revenue percentage for Class A (cumulative)'),
+    ('abc_revenue_threshold_b', '0.95', 'Revenue percentage for Class B (cumulative)'),
+    ('abc_calculation_basis', 'revenue_30d', 'Metric for ABC calc (revenue_30d, sales_30d, lifetime_revenue)'),
+    ('abc_calculation_period', '30', 'Days period for ABC calculation if not lifetime'),
+    ('default_forecast_method', 'standard', 'Default forecast method (standard, seasonal)'),
+    ('default_lead_time_days', '14', 'Global default lead time in days'),
+    ('default_days_of_stock', '30', 'Global default days of stock coverage target'),
+    -- Set default safety stock to 0 units. Can be overridden per product.
+    -- If you wanted safety stock in days, you'd store 'days' here and calculate units later.
+    ('default_safety_stock_units', '0', 'Global default safety stock in units')
+ON CONFLICT (setting_key) DO UPDATE SET
+    setting_value = EXCLUDED.setting_value,
+    description = EXCLUDED.description,
+    updated_at = CURRENT_TIMESTAMP; -- Update timestamp if default value changes
+
+
+      
+-- Description: Creates placeholder rows in `settings_vendor` for each unique vendor
+--              found in the `products` table. Does NOT set specific overrides.
+--              Safe to rerun; will NOT overwrite existing vendor settings.
+-- Dependencies: `settings_vendor` table must exist, `products` table populated.
+-- Frequency: Run once after initial product load, or periodically if new vendors are added.
+
+INSERT INTO public.settings_vendor (
+    vendor,
+    default_lead_time_days,
+    default_days_of_stock
+    -- updated_at will use its default CURRENT_TIMESTAMP on insert
+)
+SELECT
+    DISTINCT p.vendor,
+    -- Explicitly cast NULL to INTEGER to resolve type mismatch
+    CAST(NULL AS INTEGER),
+    CAST(NULL AS INTEGER)
+FROM
+    public.products p
+WHERE
+    p.vendor IS NOT NULL
+    AND p.vendor <> '' -- Exclude blank vendors if necessary
+
+ON CONFLICT (vendor) DO NOTHING; -- IMPORTANT: Do not overwrite existing vendor settings
+
+SELECT COUNT(*) FROM public.settings_vendor; -- Verify rows were inserted
+
+      
+-- Description: Creates placeholder rows in `settings_product` for each unique product
+--              found in the `products` table. Sets basic defaults but no specific overrides.
+--              Safe to rerun; will NOT overwrite existing product settings.
+-- Dependencies: `settings_product` table must exist, `products` table populated.
+-- Frequency: Run once after initial product load, or periodically if new products are added.
+
+INSERT INTO public.settings_product (
+    pid,
+    lead_time_days,         -- NULL = Inherit from Vendor/Global
+    days_of_stock,          -- NULL = Inherit from Vendor/Global
+    safety_stock,           -- Default to 0 units initially
+    forecast_method,        -- NULL = Inherit from Global ('standard')
+    exclude_from_forecast   -- Default to FALSE
+    -- updated_at will use its default CURRENT_TIMESTAMP on insert
+)
+SELECT
+    p.pid,
+    CAST(NULL AS INTEGER),  -- Explicitly cast NULL to INTEGER
+    CAST(NULL AS INTEGER),  -- Explicitly cast NULL to INTEGER
+    COALESCE((SELECT setting_value::int FROM settings_global WHERE setting_key = 'default_safety_stock_units'), 0), -- Use global default safety stock units
+    CAST(NULL AS VARCHAR), -- Cast NULL to VARCHAR for forecast_method (already varchar, but explicit)
+    FALSE  -- Default: Include in forecast
+FROM
+    public.products p
+
+ON CONFLICT (pid) DO NOTHING; -- IMPORTANT: Do not overwrite existing product-specific settings