package config

import (

	"bufio"
	"log/slog"
	"os"

	"go.lindenii.runxiyu.org/forge/forged/internal/database"

	"go.lindenii.runxiyu.org/forge/forged/internal/hooki"

	"go.lindenii.runxiyu.org/forge/forged/internal/irc"

	"go.lindenii.runxiyu.org/forge/forged/internal/scfg"

)

type Config struct {
	HTTP struct {
		Net          string `scfg:"net"`
		Addr         string `scfg:"addr"`
		CookieExpiry int    `scfg:"cookie_expiry"`
		Root         string `scfg:"root"`
		ReadTimeout  uint32 `scfg:"read_timeout"`
		WriteTimeout uint32 `scfg:"write_timeout"`
		IdleTimeout  uint32 `scfg:"idle_timeout"`
		ReverseProxy bool   `scfg:"reverse_proxy"`
	} `scfg:"http"`

	Hooks struct {
		Socket string `scfg:"socket"`
		Execs  string `scfg:"execs"`
	} `scfg:"hooks"`
	LMTP struct {

	Hooks hooki.Config `scfg:"hooks"`
	LMTP  struct {

		Socket       string `scfg:"socket"`
		Domain       string `scfg:"domain"`
		MaxSize      int64  `scfg:"max_size"`
		WriteTimeout uint32 `scfg:"write_timeout"`
		ReadTimeout  uint32 `scfg:"read_timeout"`
	} `scfg:"lmtp"`
	Git struct {
		RepoDir    string `scfg:"repo_dir"`
		Socket     string `scfg:"socket"`
		DaemonPath string `scfg:"daemon_path"`
	} `scfg:"git"`
	SSH struct {
		Net  string `scfg:"net"`
		Addr string `scfg:"addr"`
		Key  string `scfg:"key"`
		Root string `scfg:"root"`
	} `scfg:"ssh"`
	IRC     irc.Config `scfg:"irc"`
	General struct {
		Title string `scfg:"title"`
	} `scfg:"general"`

	DB database.Config `scfg:"db"`

	DB    database.Config `scfg:"db"`

	Pprof struct {
		Net  string `scfg:"net"`
		Addr string `scfg:"addr"`
	} `scfg:"pprof"`
}

func Open(path string) (config Config, err error) {
	var configFile *os.File

	if configFile, err = os.Open(path); err != nil {
		return config, err
	}
	defer configFile.Close()

	decoder := scfg.NewDecoder(bufio.NewReader(configFile))
	if err = decoder.Decode(&config); err != nil {
		return config, err
	}
	for _, u := range decoder.UnknownDirectives() {
		slog.Warn("unknown configuration directive", "directive", u)
	}

	return config, err
}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>

// Package database provides stubs and wrappers for databases.
package database

import (
	"context"

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

// Database is a wrapper around pgxpool.Pool to provide a common interface for
// other packages in the forge.
type Database struct {
	*pgxpool.Pool
}

// Open opens a new database connection pool using the provided connection
// string. It returns a Database instance and an error if any occurs.
// It is run indefinitely in the background.

func Open(connString string) (Database, error) {
	db, err := pgxpool.New(context.Background(), connString)

func Open(ctx context.Context, config Config) (Database, error) {
	db, err := pgxpool.New(ctx, config.Conn)

	return Database{db}, err
}

type Config struct {
	Type string `scfg:"type"`
	Conn string `scfg:"conn"`
}

package hooki

import (

	"go.lindenii.runxiyu.org/forge/forged/internal/cmap"

	"fmt"
	"net"

	"github.com/gliderlabs/ssh"

	"go.lindenii.runxiyu.org/forge/forged/internal/cmap"
	"go.lindenii.runxiyu.org/forge/forged/internal/misc"

)

type Pool cmap.Map[string, hookinfo]

type Pool struct {
	hookMap         cmap.Map[string, hookInfo]
	socketPath      string
	executablesPath string
}

type Config struct {
	Socket string `scfg:"socket"`
	Execs  string `scfg:"execs"`
}

type hookinfo struct {

type hookInfo struct {

	session      ssh.Session
	pubkey       string
	directAccess bool
	repoPath     string
	userID       int
	userType     string
	repoID       int
	groupPath    []string
	repoName     string
	contribReq   string
}

func New(config Config) (pool Pool) {
	pool.socketPath = config.Socket
	pool.executablesPath = config.Execs
	return
}

func (pool *Pool) Run() error {
	listener, _, err := misc.ListenUnixSocket(pool.socketPath)
	if err != nil {
		return fmt.Errorf("listen unix socket for hooks: %w", err)
	}

	for {
		conn, err := listener.Accept()
		if err != nil {
			return fmt.Errorf("accept conn: %w", err)
		}

		go pool.handleConn(conn)
	}
}

func (pool *Pool) handleConn(conn net.Conn) {
	panic("TODO: handle hook connection")
}

package lmtp

import (
	"fmt"
	"net"

	"go.lindenii.runxiyu.org/forge/forged/internal/misc"
)

type Pool struct {
	socket       string
	domain       string
	maxSize      int64
	writeTimeout uint32
	readTimeout  uint32
}

type Config struct {
	Socket       string `scfg:"socket"`
	Domain       string `scfg:"domain"`
	MaxSize      int64  `scfg:"max_size"`
	WriteTimeout uint32 `scfg:"write_timeout"`
	ReadTimeout  uint32 `scfg:"read_timeout"`
}

func New(config Config) (pool Pool) {
	pool.socket = config.Socket
	pool.domain = config.Domain
	pool.maxSize = config.MaxSize
	pool.writeTimeout = config.WriteTimeout
	pool.readTimeout = config.ReadTimeout
	return pool
}

func (pool *Pool) Run() error {
	listener, _, err := misc.ListenUnixSocket(pool.socket)
	if err != nil {
		return fmt.Errorf("listen unix socket for LMTP: %w", err)
	}

	for {
		conn, err := listener.Accept()
		if err != nil {
			return fmt.Errorf("accept conn: %w", err)
		}

		go pool.handleConn(conn)
	}
}

func (pool *Pool) handleConn(conn net.Conn) {
	panic("TODO: handle LMTP connection")
}

package misc

import (
	"errors"
	"fmt"
	"net"
	"syscall"
)

func ListenUnixSocket(path string) (listener net.Listener, replaced bool, err error) {
	listener, err = net.Listen("unix", path)
	if errors.Is(err, syscall.EADDRINUSE) {
		replaced = true
		if unlinkErr := syscall.Unlink(path); unlinkErr != nil {
			return listener, false, fmt.Errorf("remove existing socket %q: %w", path, unlinkErr)
		}
		listener, err = net.Listen("unix", path)
	}
	if err != nil {
		return listener, replaced, fmt.Errorf("listen on unix socket %q: %w", path, err)
	}
	return listener, replaced, nil
}

package server

import (
	"context"
	"fmt"
	"html/template"

	"log"

	"go.lindenii.runxiyu.org/forge/forged/internal/config"
	"go.lindenii.runxiyu.org/forge/forged/internal/database"
	"go.lindenii.runxiyu.org/forge/forged/internal/hooki"

	"go.lindenii.runxiyu.org/forge/forged/internal/lmtp"

	"go.lindenii.runxiyu.org/forge/forged/internal/store"
)

type Server struct {
	config config.Config

	database database.Database
	stores *store.Set
	hookis *hooki.Pool

	database  database.Database
	stores    *store.Set
	hookPool  hooki.Pool
	lmtpPool  lmtp.Pool

	templates *template.Template
}

func New(ctx context.Context, config config.Config) (*Server, error) {
	database, err := database.Open(ctx, config.DB)	

func New(ctx context.Context, configPath string) (server *Server, err error) {
	server = &Server{}

	server.config, err = config.Open(configPath)

	if err != nil {

		return nil, fmt.Errorf("open database: %w", err)

		return server, fmt.Errorf("open config: %w", err)

	}

	return &Server{
		database: database,
	}, nil

	// TODO: Should this belong here, or in Run()?
	server.database, err = database.Open(ctx, server.config.DB)
	if err != nil {
		return server, fmt.Errorf("open database: %w", err)
	}

	return server, nil
}

func (s *Server) Run() error {
	// TODO: Not running git2d because it should be run separately.
	// This needs to be documented somewhere, hence a TODO here for now.

	go func() {
		s.hookPool = hooki.New(s.config.Hooks)
		if err := s.hookPool.Run(); err != nil {
			log.Fatalf("run hook pool: %v", err)
		}
	}()

	go func() {
		s.lmtpPool = lmtp.New(s.config.LMTP)
		if err := s.lmtpPool.Run(); err != nil {
			log.Fatalf("run LMTP pool: %v", err)
		}
	}()

	return nil

}

// SPDX-License-Identifier: AGPL-3.0-only
// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>

// The main entry point to the Lindenii Forge daemon.
package main

import (

	"context"

	"flag"

	"go.lindenii.runxiyu.org/forge/forged/internal/unsorted"

	"go.lindenii.runxiyu.org/forge/forged/internal/server"

)

func main() {
	configPath := flag.String(
		"config",
		"/etc/lindenii/forge.scfg",
		"path to configuration file",
	)
	flag.Parse()

	s, err := unsorted.NewServer(*configPath)

	s, err := server.New(context.Background(), *configPath)

	if err != nil {
		panic(err)
	}

	panic(s.Run())
}