package models

import "odoo-go/pkg/orm"

// initPurchaseOrder registers purchase.order and purchase.order.line.
// Mirrors: odoo/addons/purchase/models/purchase_order.py

func initPurchaseOrder() {
	// purchase.order — the purchase order header
	m := orm.NewModel("purchase.order", orm.ModelOpts{
		Description: "Purchase Order",
		Order:       "priority desc, id desc",
		RecName:     "name",
	})

	// -- Identity --
	m.AddFields(
		orm.Char("name", orm.FieldOpts{
			String: "Order Reference", Required: true, Index: true, Readonly: true, Default: "New",
		}),
		orm.Selection("state", []orm.SelectionItem{
			{Value: "draft", Label: "RFQ"},
			{Value: "sent", Label: "RFQ Sent"},
			{Value: "to approve", Label: "To Approve"},
			{Value: "purchase", Label: "Purchase Order"},
			{Value: "cancel", Label: "Cancelled"},
		}, orm.FieldOpts{String: "Status", Default: "draft", Readonly: true, Index: true}),
		orm.Selection("priority", []orm.SelectionItem{
			{Value: "0", Label: "Normal"},
			{Value: "1", Label: "Urgent"},
		}, orm.FieldOpts{String: "Priority", Default: "0", Index: true}),
	)

	// -- Partner & Dates --
	m.AddFields(
		orm.Many2one("partner_id", "res.partner", orm.FieldOpts{
			String: "Vendor", Required: true, Index: true,
		}),
		orm.Datetime("date_order", orm.FieldOpts{
			String: "Order Deadline", Required: true, Index: true,
		}),
		orm.Datetime("date_planned", orm.FieldOpts{
			String: "Expected Arrival",
		}),
		orm.Datetime("date_approve", orm.FieldOpts{
			String: "Confirmation Date", Readonly: true, Index: true,
		}),
	)

	// -- Company & Currency --
	m.AddFields(
		orm.Many2one("company_id", "res.company", orm.FieldOpts{
			String: "Company", Required: true, Index: true,
		}),
		orm.Many2one("currency_id", "res.currency", orm.FieldOpts{
			String: "Currency", Required: true,
		}),
	)

	// -- Lines --
	m.AddFields(
		orm.One2many("order_line", "purchase.order.line", "order_id", orm.FieldOpts{
			String: "Order Lines",
		}),
	)

	// -- Amounts --
	m.AddFields(
		orm.Monetary("amount_untaxed", orm.FieldOpts{
			String: "Untaxed Amount", Compute: "_compute_amount", Store: true, CurrencyField: "currency_id",
		}),
		orm.Monetary("amount_tax", orm.FieldOpts{
			String: "Taxes", Compute: "_compute_amount", Store: true, CurrencyField: "currency_id",
		}),
		orm.Monetary("amount_total", orm.FieldOpts{
			String: "Total", Compute: "_compute_amount", Store: true, CurrencyField: "currency_id",
		}),
	)

	// -- Invoice Status --
	m.AddFields(
		orm.Selection("invoice_status", []orm.SelectionItem{
			{Value: "no", Label: "Nothing to Bill"},
			{Value: "to invoice", Label: "Waiting Bills"},
			{Value: "invoiced", Label: "Fully Billed"},
		}, orm.FieldOpts{String: "Billing Status", Compute: "_compute_invoice_status", Store: true}),
	)

	// -- Accounting --
	m.AddFields(
		orm.Many2one("fiscal_position_id", "account.fiscal.position", orm.FieldOpts{
			String: "Fiscal Position",
		}),
		orm.Many2one("payment_term_id", "account.payment.term", orm.FieldOpts{
			String: "Payment Terms",
		}),
	)

	// -- Notes --
	m.AddFields(
		orm.Text("notes", orm.FieldOpts{String: "Terms and Conditions"}),
		orm.Char("origin", orm.FieldOpts{String: "Source Document"}),
	)

	// purchase.order.line — individual line items on a PO
	initPurchaseOrderLine()
}

// initPurchaseOrderLine registers purchase.order.line.
// Mirrors: odoo/addons/purchase/models/purchase_order_line.py
func initPurchaseOrderLine() {
	m := orm.NewModel("purchase.order.line", orm.ModelOpts{
		Description: "Purchase Order Line",
		Order:       "order_id, sequence, id",
	})

	// -- Parent --
	m.AddFields(
		orm.Many2one("order_id", "purchase.order", orm.FieldOpts{
			String: "Order Reference", Required: true, OnDelete: orm.OnDeleteCascade, Index: true,
		}),
		orm.Integer("sequence", orm.FieldOpts{String: "Sequence", Default: 10}),
	)

	// -- Product --
	m.AddFields(
		orm.Many2one("product_id", "product.product", orm.FieldOpts{
			String: "Product", Index: true,
		}),
		orm.Char("name", orm.FieldOpts{String: "Description", Required: true}),
		orm.Float("product_qty", orm.FieldOpts{String: "Quantity", Required: true, Default: 1.0}),
		orm.Many2one("product_uom", "uom.uom", orm.FieldOpts{
			String: "Unit of Measure", Required: true,
		}),
	)

	// -- Pricing --
	m.AddFields(
		orm.Float("price_unit", orm.FieldOpts{String: "Unit Price", Required: true}),
		orm.Many2many("tax_ids", "account.tax", orm.FieldOpts{String: "Taxes"}),
		orm.Float("discount", orm.FieldOpts{String: "Discount (%)", Default: 0.0}),
		orm.Monetary("price_subtotal", orm.FieldOpts{
			String: "Subtotal", Compute: "_compute_amount", Store: true, CurrencyField: "currency_id",
		}),
		orm.Monetary("price_total", orm.FieldOpts{
			String: "Total", Compute: "_compute_amount", Store: true, CurrencyField: "currency_id",
		}),
		orm.Many2one("currency_id", "res.currency", orm.FieldOpts{
			String: "Currency",
		}),
	)

	// -- Dates --
	m.AddFields(
		orm.Datetime("date_planned", orm.FieldOpts{String: "Expected Arrival"}),
	)

	// -- Quantities --
	m.AddFields(
		orm.Float("qty_received", orm.FieldOpts{
			String: "Received Qty", Compute: "_compute_qty_received", Store: true,
		}),
		orm.Float("qty_invoiced", orm.FieldOpts{
			String: "Billed Qty", Compute: "_compute_qty_invoiced", Store: true,
		}),
		orm.Float("qty_to_invoice", orm.FieldOpts{
			String: "To Invoice Quantity", Compute: "_compute_qty_to_invoice", Store: true,
		}),
	)

	// -- Company --
	m.AddFields(
		orm.Many2one("company_id", "res.company", orm.FieldOpts{
			String: "Company", Index: true,
		}),
	)
}