package httpapi

import (
	"context"
	"crypto/ed25519"
	"crypto/rand"
	"encoding/hex"
	"errors"
	"net/http"
	"strings"
	"time"

	"evobgp/internal/jobs"
	"evobgp/internal/store"

	"github.com/jackc/pgx/v5/pgxpool"
)

// Server implements EvoBGP control-plane HTTP API.
type Server struct {
	store       store.Backend
	pgPool      *pgxpool.Pool
	jobs        *jobs.Registry
	bundlePriv  ed25519.PrivateKey
	apiKeys     []apiKeyRecord
	insecureDev bool
	corsOrigins []string
	mux         *http.ServeMux
}

// Options configures the API server.
type Options struct {
	APIKeys string
	// DatabaseURL enables PostgreSQL-backed store (migrations applied on connect).
	DatabaseURL string
	InsecureDev bool
	SeedDemo    bool
	BundleSeedHex string
	CORSAllowedOrigins string
}

// New constructs Server and wiring for async jobs.
func New(opts Options) (*Server, error) {
	backend, pool, reg, err := BootstrapWorkers(context.Background(), opts)
	if err != nil {
		return nil, err
	}

	var priv ed25519.PrivateKey
	if strings.TrimSpace(opts.BundleSeedHex) != "" {
		seed, err := hex.DecodeString(strings.TrimSpace(opts.BundleSeedHex))
		if err != nil {
			return nil, err
		}
		if len(seed) != ed25519.SeedSize {
			return nil, errors.New("httpapi: BundleSeedHex must decode to 32 bytes")
		}
		priv = ed25519.NewKeyFromSeed(seed)
	} else {
		_, priv, _ = ed25519.GenerateKey(rand.Reader)
	}

	s := &Server{
		store:       backend,
		pgPool:      pool,
		jobs:        reg,
		bundlePriv:  priv,
		apiKeys:     parseAPIKeysSpec(opts.APIKeys),
		insecureDev: opts.InsecureDev && opts.SeedDemo,
		corsOrigins: parseCORSOrigins(opts.CORSAllowedOrigins),
	}
	s.mux = http.NewServeMux()
	s.registerRoutes()
	return s, nil
}

// Close releases database resources.
func (s *Server) Close() {
	if s.pgPool != nil {
		s.pgPool.Close()
	}
}

// Store exposes the backing store (for operators / tests).
func (s *Server) Store() store.Backend { return s.store }

// Jobs exposes the in-process async job registry (for scheduler / evobgp-all).
func (s *Server) Jobs() *jobs.Registry { return s.jobs }