// Command verify-resolver loads the deterministic alias and relationship resolver against a database and
// proves that a curated alias and a curated relationship resolve end to end. It is the live counterpart
// to the resolver unit tests, which inject the maps directly: this exercises the real DB load (the
// skills, skill_aliases, and skill_relationships queries, including the numeric strength scan). Read only.
//
// Usage: verify-resolver -dsn <app or migrator DSN>
package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"os"

	"github.com/missionworkforce/missionmatch/internal/modules/matching"
	"github.com/missionworkforce/missionmatch/internal/modules/matching/engine"
	"github.com/missionworkforce/missionmatch/internal/platform/database"
	"github.com/missionworkforce/missionmatch/internal/platform/tenant"
)

func main() {
	dsn := flag.String("dsn", os.Getenv("MM_APP_DATABASE_URL"), "database DSN (app or migrator)")
	flag.Parse()
	if *dsn == "" {
		log.Fatal("verify-resolver: -dsn is required")
	}
	ctx := context.Background()
	pool, err := database.NewPool(ctx, *dsn)
	if err != nil {
		log.Fatalf("db: %v", err)
	}
	defer pool.Close()
	resolver := matching.NewDeterministicAliasResolver(tenant.New(pool))

	failed := false
	// Alias: a candidate holding Signals Intelligence resolves a SIGINT requirement (exact, similarity 1.0).
	probe(ctx, resolver, "alias SIGINT", engine.RequiredSkill{Name: "SIGINT"}, "Signals Intelligence", true, &failed)
	// Relationship: OpenShift substitutes_for Kubernetes, a partial credit at the curated strength.
	probe(ctx, resolver, "rel OpenShift to Kubernetes", engine.RequiredSkill{Name: "Kubernetes"}, "OpenShift", false, &failed)

	if failed {
		fmt.Println("VERIFY-RESOLVER: FAIL")
		os.Exit(1)
	}
	fmt.Println("VERIFY-RESOLVER: PASS (the resolver loaded the curated layer and resolved both probes)")
}

func probe(ctx context.Context, r *matching.DeterministicAliasResolver, label string, req engine.RequiredSkill, candName string, wantAlias bool, failed *bool) {
	m, ok := r.ResolveAlias(ctx, req, []engine.CandidateSkill{{Name: candName}})
	if !ok || !m.Matched {
		fmt.Printf("  %-28s FAIL (no match for candidate %q)\n", label, candName)
		*failed = true
		return
	}
	fmt.Printf("  %-28s matched: similarity=%s exact=%v aliasMatched=%v\n", label, m.Similarity.String(), m.Exact, m.AliasMatched)
	if wantAlias && !m.AliasMatched {
		fmt.Printf("  %-28s FAIL (expected an alias sourced match)\n", label)
		*failed = true
	}
}