package app

import (
	"database/sql"
	"errors"
	"fmt"
	"time"

	appconfig "gitocean/internal/config"
	"gitocean/internal/model"
	"gitocean/internal/validate"
)

const (
	defaultServerURL = appconfig.DefaultServerURL
	defaultStorage   = appconfig.DefaultStorage
	tokenTTL         = 7 * 24 * time.Hour
)

var (
	ErrUsage = errors.New("usage")

	usernameRE = validate.UsernameRE
	repoNameRE = validate.RepoNameRE
	branchRE   = validate.BranchRE
)

type User = model.User
type Repository = model.Repository
type PullRequest = model.PullRequest
type ServerConfig = model.ServerConfig
type RefInfo = model.RefInfo
type Collaborator = model.Collaborator
type PRComment = model.PRComment
type TokenInfo = model.TokenInfo
type Config = model.Config

type Server struct {
	db        *sql.DB
	storage   string
	publicURL string
}

func Run(args []string) error {
	if len(args) < 1 {
		usage()
		return ErrUsage
	}

	switch args[0] {
	case "init":
		return cliInit(args[1:])
	case "server":
		return runServer(args[1:])
	case "register":
		return cliRegister(args[1:])
	case "login":
		return cliLogin(args[1:])
	case "logout":
		return cliLogout(args[1:])
	case "whoami":
		return cliWhoami(args[1:])
	case "clone":
		return cliClone(args[1:])
	case "repo":
		return cliRepo(args[1:])
	case "pr":
		return cliPR(args[1:])
	case "token":
		return cliToken(args[1:])
	case "admin":
		return cliAdmin(args[1:])
	case "backup":
		return cliBackup(args[1:])
	case "help", "-h", "--help":
		usage()
		return nil
	default:
		return fmt.Errorf("unknown command %q", args[0])
	}
}

func usage() {
	fmt.Println(`gitocean - CLI and server for a small Git hosting platform

Commands:
  gitocean init [--config storage/config.json]
  gitocean server [--config storage/config.json] [--dsn DSN] [--addr :8080] [--storage storage]
  gitocean server users --dsn DSN list
  gitocean server users --dsn DSN view USER
  gitocean server users --dsn DSN add --email EMAIL --username USER --password PASSWORD [--admin]
  gitocean server users --dsn DSN edit USER [--email EMAIL] [--username USER] [--password PASSWORD] [--admin true|false]
  gitocean server users --dsn DSN remove USER --force
  gitocean register [--server URL]
  gitocean login [--server URL]
  gitocean logout
  gitocean whoami
  gitocean clone OWNER/REPO
  gitocean repo create NAME (--public|--private) [--description TEXT]
  gitocean repo publish NAME (--public|--private) [--remote origin] [--branch main]
  gitocean repo view OWNER/REPO
  gitocean repo branches OWNER/REPO
  gitocean repo tags OWNER/REPO
  gitocean repo set OWNER/REPO [--description TEXT] [--visibility public|private] [--default-branch main]
  gitocean repo delete OWNER/REPO [--force]
  gitocean repo search QUERY [--all|--mine] [--json]
  gitocean repo fork OWNER/REPO [--name NEW_NAME]
  gitocean repo collaborators OWNER/REPO
  gitocean repo collaborator add OWNER/REPO USER --role read|write
  gitocean repo collaborator remove OWNER/REPO USER
  gitocean pr create --from OWNER/REPO:BRANCH --to OWNER/REPO:BRANCH --title TITLE [--description DESC]
  gitocean pr create --repo OWNER/REPO --from BRANCH --to BRANCH --title TITLE [--description DESC]
  gitocean pr list OWNER/REPO [--json]
  gitocean pr view OWNER/REPO NUMBER [--json]
  gitocean pr diff OWNER/REPO NUMBER
  gitocean pr checkout OWNER/REPO NUMBER
  gitocean pr comment OWNER/REPO NUMBER "text"
  gitocean pr comments OWNER/REPO NUMBER
  gitocean pr close OWNER/REPO NUMBER
  gitocean pr merge OWNER/REPO NUMBER
  gitocean token list [--json]
  gitocean token revoke TOKEN_ID
  gitocean token prune
  gitocean admin users list
  gitocean admin users delete USER
  gitocean admin repos list
  gitocean admin storage check
  gitocean backup create FILE
  gitocean backup restore FILE`)
}