package main

import (
	"context"
	"fmt"
	"testing"
	"time"

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

func testApplier(t *testing.T) *orderedApplier {
	t.Helper()
	reg := actor.NewMutationRegistry()
	order.RegisterMutations(reg)
	storage := actor.NewDiskStorage[order.OrderGrain](t.TempDir(), reg)
	pool, err := actor.NewSimpleGrainPool(actor.GrainPoolConfig[order.OrderGrain]{
		Hostname: "test",
		Spawn: func(_ context.Context, id uint64) (actor.Grain[order.OrderGrain], error) {
			return order.NewOrderGrain(id, time.Now()), nil
		},
		SpawnHost: func(string) (actor.Host[order.OrderGrain], error) { return nil, fmt.Errorf("none") },
		Destroy:   func(actor.Grain[order.OrderGrain]) error { return nil },
		TTL:       time.Hour,
		PoolSize:  100,

		MutationRegistry: reg,
		Storage:          nil,
	})
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(pool.Close)
	return &orderedApplier{pool: pool, storage: storage}
}

func TestIngestLegacyOrder(t *testing.T) {
	app := testApplier(t)
	ctx := context.Background()
	body := []byte(`{
		"order_id":"K-1","purchase_currency":"SEK","purchase_country":"se","locale":"sv-SE",
		"order_amount":15000,"order_tax_amount":3000,
		"order_lines":[{"reference":"l1","name":"Widget","quantity":1,"unit_price":15000,"tax_rate":25,"total_amount":15000,"total_tax_amount":3000}]
	}`)

	if err := ingestLegacyOrder(ctx, app, body); err != nil {
		t.Fatalf("ingest: %v", err)
	}
	id := legacyOrderID("K-1")
	g, err := app.Get(ctx, id)
	if err != nil {
		t.Fatal(err)
	}
	if g.Status != order.StatusCaptured {
		t.Fatalf("status = %q, want captured", g.Status)
	}
	if g.CapturedAmount != 15000 {
		t.Fatalf("captured = %d, want 15000", g.CapturedAmount)
	}

	// Redelivery must be idempotent — no double capture, no new payment.
	if err := ingestLegacyOrder(ctx, app, body); err != nil {
		t.Fatalf("re-ingest: %v", err)
	}
	g2, _ := app.Get(ctx, id)
	if g2.CapturedAmount != 15000 {
		t.Fatalf("redelivery double-captured: %d", g2.CapturedAmount)
	}
	if len(g2.Payments) != 1 {
		t.Fatalf("redelivery created %d payments, want 1", len(g2.Payments))
	}
}