package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log/slog"

	"git.k6n.net/mats/go-cart-actor/pkg/flow"
	"git.k6n.net/mats/go-cart-actor/pkg/order"
)

type projectFulfillmentHookParams struct {
	Integration string `json:"integration,omitempty"`
	Target      string `json:"target,omitempty"`
	Dropship    bool   `json:"dropship,omitempty"`
}

// registerProjectFlowHooks is the project-layer seam for customer-specific flow
// integrations. These belong here rather than pkg/order so core order logic
// stays generic while deployments can register their own fulfillment tools.
func registerProjectFlowHooks(reg *flow.Registry, app *orderedApplier, logger *slog.Logger) {
	if logger == nil {
		logger = slog.Default()
	}
	reg.HookWithMeta("project_fulfillment_integration", func(ctx context.Context, st *flow.State, info flow.HookInfo, params json.RawMessage) error {
		var p projectFulfillmentHookParams
		if len(params) > 0 {
			if err := json.Unmarshal(params, &p); err != nil {
				return fmt.Errorf("project_fulfillment_integration: bad params: %w", err)
			}
		}
		if p.Integration == "" {
			p.Integration = "order-integration"
		}

		o, err := app.Get(ctx, st.ID)
		if err != nil {
			return err
		}
		if len(o.Fulfillments) == 0 {
			return fmt.Errorf("project_fulfillment_integration: order %s has no fulfillment yet", order.OrderId(st.ID).String())
		}
		last := o.Fulfillments[len(o.Fulfillments)-1]

		log := st.Logger
		if log == nil {
			log = logger
		}
		log.Info("project fulfillment integration",
			"orderId", order.OrderId(st.ID).String(),
			"orderReference", o.OrderReference,
			"customerEmail", o.CustomerEmail,
			"integration", p.Integration,
			"target", p.Target,
			"dropship", p.Dropship,
			"step", info.Step,
			"phase", info.Phase,
			"fulfillmentId", last.ID,
			"carrier", last.Carrier,
			"trackingNumber", last.TrackingNumber,
		)
		return nil
	}, flow.CapabilityMeta{
		Description:   "Project-specific fulfillment integration seam for local or testing adapters.",
		ExampleParams: json.RawMessage(`{"integration":"dropship-test","target":"erp-sandbox","dropship":true}`),
	})
}