package models

import "odoo-go/pkg/orm"

// initSaleMargin adds margin fields to sale.order.line and sale.order.
// Mirrors: odoo/addons/sale_margin/models/sale_order_line.py + sale_order.py

func initSaleMargin() {
	// -- Extend sale.order.line with margin fields --
	line := orm.ExtendModel("sale.order.line")
	line.AddFields(
		orm.Float("purchase_price", orm.FieldOpts{String: "Cost Price"}),
		orm.Monetary("margin", orm.FieldOpts{
			String: "Margin", Compute: "_compute_margin", Store: true, CurrencyField: "currency_id",
		}),
		orm.Float("margin_percent", orm.FieldOpts{
			String: "Margin (%)", Compute: "_compute_margin", Store: true,
		}),
	)

	computeLineMargin := func(rs *orm.Recordset) (orm.Values, error) {
		env := rs.Env()
		lineID := rs.IDs()[0]
		var subtotal, cost float64
		env.Tx().QueryRow(env.Ctx(),
			`SELECT COALESCE(price_subtotal, 0), COALESCE(purchase_price, 0) * COALESCE(product_uom_qty, 0)
			 FROM sale_order_line WHERE id = $1`, lineID,
		).Scan(&subtotal, &cost)
		margin := subtotal - cost
		pct := float64(0)
		if subtotal > 0 {
			pct = margin / subtotal * 100
		}
		return orm.Values{"margin": margin, "margin_percent": pct}, nil
	}
	line.RegisterCompute("margin", computeLineMargin)
	line.RegisterCompute("margin_percent", computeLineMargin)

	// -- Extend sale.order with total margin --
	so := orm.ExtendModel("sale.order")
	so.AddFields(
		orm.Monetary("margin", orm.FieldOpts{
			String: "Margin", Compute: "_compute_margin", Store: true, CurrencyField: "currency_id",
		}),
		orm.Float("margin_percent", orm.FieldOpts{
			String: "Margin (%)", Compute: "_compute_margin", Store: true,
		}),
	)

	computeSOMargin := func(rs *orm.Recordset) (orm.Values, error) {
		env := rs.Env()
		soID := rs.IDs()[0]
		var margin, untaxed float64
		env.Tx().QueryRow(env.Ctx(),
			`SELECT COALESCE(SUM(margin), 0), COALESCE(SUM(price_subtotal), 0)
			 FROM sale_order_line WHERE order_id = $1
			 AND (display_type IS NULL OR display_type = '' OR display_type = 'product')`,
			soID,
		).Scan(&margin, &untaxed)
		pct := float64(0)
		if untaxed > 0 {
			pct = margin / untaxed * 100
		}
		return orm.Values{"margin": margin, "margin_percent": pct}, nil
	}
	so.RegisterCompute("margin", computeSOMargin)
	so.RegisterCompute("margin_percent", computeSOMargin)
}