package appconfig

import (
	"fmt"
	"strings"

	"github.com/ark-network/ark/common"
	"github.com/ark-network/ark/internal/core/application"
	"github.com/ark-network/ark/internal/core/ports"
	"github.com/ark-network/ark/internal/infrastructure/db"
	oceanwallet "github.com/ark-network/ark/internal/infrastructure/ocean-wallet"
	txbuilder "github.com/ark-network/ark/internal/infrastructure/tx-builder/covenant"
	txbuilderdummy "github.com/ark-network/ark/internal/infrastructure/tx-builder/dummy"
	log "github.com/sirupsen/logrus"
	"github.com/vulpemventures/go-elements/network"
)

var (
	supportedDbs = supportedType{
		"badger": {},
	}
	supportedSchedulers = supportedType{
		"gocron": {},
	}
	supportedTxBuilders = supportedType{
		"dummy":    {},
		"covenant": {},
	}
)

type Config struct {
	DbType        string
	DbDir         string
	RoundInterval int64
	Network       common.Network
	SchedulerType string
	TxBuilderType string
	WalletAddr    string

	repo      ports.RepoManager
	svc       application.Service
	wallet    ports.WalletService
	txBuilder ports.TxBuilder
}

func (c *Config) Validate() error {
	if !supportedDbs.supports(c.DbType) {
		return fmt.Errorf("db type not supported, please select one of: %s", supportedDbs)
	}
	if !supportedSchedulers.supports(c.SchedulerType) {
		return fmt.Errorf("scheduler type not supported, please select one of: %s", supportedSchedulers)
	}
	if !supportedTxBuilders.supports(c.TxBuilderType) {
		return fmt.Errorf("tx builder type not supported, please select one of: %s", supportedTxBuilders)
	}
	if c.RoundInterval < 5 {
		return fmt.Errorf("invalid round interval, must be at least 5 seconds")
	}
	if c.Network.Name != "liquid" && c.Network.Name != "testnet" {
		return fmt.Errorf("invalid network, must be either liquid or testnet")
	}
	if len(c.WalletAddr) <= 0 {
		return fmt.Errorf("missing onchain wallet address")
	}
	if err := c.repoManager(); err != nil {
		return err
	}
	if err := c.walletService(); err != nil {
		return fmt.Errorf("failed to connect to wallet: %s", err)
	}
	if err := c.txBuilderService(); err != nil {
		return err
	}
	if err := c.appService(); err != nil {
		return err
	}
	return nil
}

func (c *Config) AppService() application.Service {
	return c.svc
}

func (c *Config) repoManager() error {
	var svc ports.RepoManager
	var err error
	switch c.DbType {
	case "badger":
		logger := log.New()
		svc, err = db.NewService(db.ServiceConfig{
			EventStoreType: c.DbType,
			RoundStoreType: c.DbType,
			VtxoStoreType:  c.DbType,

			EventStoreConfig: []interface{}{c.DbDir, logger},
			RoundStoreConfig: []interface{}{c.DbDir, logger},
			VtxoStoreConfig:  []interface{}{c.DbDir, logger},
		})
	default:
		return fmt.Errorf("unknown db type")
	}
	if err != nil {
		return err
	}

	c.repo = svc
	return nil
}

func (c *Config) walletService() error {
	svc, err := oceanwallet.NewService(c.WalletAddr)
	if err != nil {
		return err
	}

	c.wallet = svc
	return nil
}

func (c *Config) txBuilderService() error {
	var svc ports.TxBuilder
	var err error
	net := c.mainChain()
	switch c.TxBuilderType {
	case "dummy":
		svc = txbuilderdummy.NewTxBuilder(net)
	case "covenant":
		svc = txbuilder.NewTxBuilder(net)
	default:
		err = fmt.Errorf("unknown tx builder type")
	}
	if err != nil {
		return err
	}

	c.txBuilder = svc
	return nil
}

func (c *Config) appService() error {
	net := c.mainChain()
	svc, err := application.NewService(
		c.RoundInterval, c.Network, net, c.wallet, c.repo, c.txBuilder,
	)
	if err != nil {
		return err
	}

	c.svc = svc
	return nil
}

func (c *Config) mainChain() network.Network {
	net := network.Liquid
	if c.Network.Name != "mainnet" {
		net = network.Testnet
	}
	return net
}

type supportedType map[string]struct{}

func (t supportedType) String() string {
	types := make([]string, 0, len(t))
	for tt := range t {
		types = append(types, tt)
	}
	return strings.Join(types, " | ")
}

func (t supportedType) supports(typeStr string) bool {
	_, ok := t[typeStr]
	return ok
}