/* Vuls - Vulnerability Scanner
Copyright (C) 2016  Future Corporation , Japan.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package commands

import (
	"context"
	"flag"
	"fmt"
	"os"
	"path/filepath"

	c "github.com/future-architect/vuls/config"
	"github.com/future-architect/vuls/models"
	"github.com/future-architect/vuls/report"
	"github.com/future-architect/vuls/util"
	"github.com/google/subcommands"
)

// TuiCmd is Subcommand of host discovery mode
type TuiCmd struct {
	lang       string
	debugSQL   bool
	debug      bool
	configPath string
	logDir     string

	resultsDir string
	refreshCve bool

	cvedbtype        string
	cvedbpath        string
	cveDictionaryURL string

	ovalDBType string
	ovalDBPath string
	ovalDBURL  string

	cvssScoreOver      float64
	ignoreUnscoredCves bool
	ignoreUnfixed      bool

	pipe bool
	diff bool
}

// Name return subcommand name
func (*TuiCmd) Name() string { return "tui" }

// Synopsis return synopsis
func (*TuiCmd) Synopsis() string { return "Run Tui view to analyze vulnerabilities" }

// Usage return usage
func (*TuiCmd) Usage() string {
	return `tui:
	tui
		[-refresh-cve]
		[-config=/path/to/config.toml]
		[-cvedb-type=sqlite3|mysql|postgres]
		[-cvedb-path=/path/to/cve.sqlite3]
		[-cvedb-url=http://127.0.0.1:1323 or DB connection string]
		[-ovaldb-type=sqlite3|mysql]
		[-ovaldb-path=/path/to/oval.sqlite3]
		[-ovaldb-url=http://127.0.0.1:1324 or DB connection string]
		[-cvss-over=7]
		[-diff]
		[-ignore-unscored-cves]
		[-ignore-unfixed]
		[-results-dir=/path/to/results]
		[-log-dir=/path/to/log]
		[-debug]
		[-debug-sql]
		[-pipe]

`
}

// SetFlags set flag
func (p *TuiCmd) SetFlags(f *flag.FlagSet) {
	//  f.StringVar(&p.lang, "lang", "en", "[en|ja]")
	f.BoolVar(&p.debugSQL, "debug-sql", false, "debug SQL")
	f.BoolVar(&p.debug, "debug", false, "debug mode")

	defaultLogDir := util.GetDefaultLogDir()
	f.StringVar(&p.logDir, "log-dir", defaultLogDir, "/path/to/log")

	wd, _ := os.Getwd()
	defaultResultsDir := filepath.Join(wd, "results")
	f.StringVar(&p.resultsDir, "results-dir", defaultResultsDir, "/path/to/results")

	defaultConfPath := filepath.Join(wd, "config.toml")
	f.StringVar(&p.configPath, "config", defaultConfPath, "/path/to/toml")

	f.BoolVar(
		&p.refreshCve,
		"refresh-cve",
		false,
		"Refresh CVE information in JSON file under results dir")

	f.StringVar(
		&p.cvedbtype,
		"cvedb-type",
		"sqlite3",
		"DB type for fetching CVE dictionary (sqlite3, mysql or postgres)")

	defaultCveDBPath := filepath.Join(wd, "cve.sqlite3")
	f.StringVar(
		&p.cvedbpath,
		"cvedb-path",
		defaultCveDBPath,
		"/path/to/sqlite3 (For get cve detail from cve.sqlite3)")

	f.StringVar(
		&p.cveDictionaryURL,
		"cvedb-url",
		"",
		"http://cve-dictionary.example.com:1323 or mysql connection string")

	f.StringVar(
		&p.ovalDBType,
		"ovaldb-type",
		"sqlite3",
		"DB type for fetching OVAL dictionary (sqlite3 or mysql)")

	defaultOvalDBPath := filepath.Join(wd, "oval.sqlite3")
	f.StringVar(
		&p.ovalDBPath,
		"ovaldb-path",
		defaultOvalDBPath,
		"/path/to/sqlite3 (For get oval detail from oval.sqlite3)")

	f.StringVar(
		&p.ovalDBURL,
		"ovaldb-url",
		"",
		"http://goval-dictionary.example.com:1324 or mysql connection string")

	f.Float64Var(
		&p.cvssScoreOver,
		"cvss-over",
		0,
		"-cvss-over=6.5 means reporting CVSS Score 6.5 and over (default: 0 (means report all))")

	f.BoolVar(&p.diff,
		"diff",
		false,
		fmt.Sprintf("Difference between previous result and current result "))

	f.BoolVar(
		&p.ignoreUnscoredCves,
		"ignore-unscored-cves",
		false,
		"Don't report the unscored CVEs")

	f.BoolVar(
		&p.ignoreUnfixed,
		"ignore-unfixed",
		false,
		"Don't report the unfixed CVEs")

	f.BoolVar(
		&p.pipe,
		"pipe",
		false,
		"Use stdin via PIPE")
}

// Execute execute
func (p *TuiCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
	c.Conf.Lang = "en"

	// Setup Logger
	c.Conf.Debug = p.debug
	c.Conf.DebugSQL = p.debugSQL
	c.Conf.LogDir = p.logDir
	util.Log = util.NewCustomLogger(c.ServerInfo{})
	log := util.Log

	if err := c.Load(p.configPath, ""); err != nil {
		util.Log.Errorf("Error loading %s, %s", p.configPath, err)
		return subcommands.ExitUsageError
	}

	c.Conf.ResultsDir = p.resultsDir
	c.Conf.CveDBType = p.cvedbtype
	c.Conf.CveDBPath = p.cvedbpath
	c.Conf.CveDBURL = p.cveDictionaryURL
	c.Conf.OvalDBType = p.ovalDBType
	c.Conf.OvalDBPath = p.ovalDBPath
	c.Conf.OvalDBURL = p.ovalDBURL
	c.Conf.CvssScoreOver = p.cvssScoreOver
	c.Conf.IgnoreUnscoredCves = p.ignoreUnscoredCves
	c.Conf.IgnoreUnfixed = p.ignoreUnfixed
	c.Conf.RefreshCve = p.refreshCve

	log.Info("Validating config...")
	if !c.Conf.ValidateOnTui() {
		return subcommands.ExitUsageError
	}

	c.Conf.Pipe = p.pipe
	c.Conf.Diff = p.diff

	var dir string
	var err error
	if p.diff {
		dir, err = report.JSONDir([]string{})
	} else {
		dir, err = report.JSONDir(f.Args())
	}
	if err != nil {
		util.Log.Errorf("Failed to read from JSON: %s", err)
		return subcommands.ExitFailure
	}
	var res models.ScanResults
	if res, err = report.LoadScanResults(dir); err != nil {
		util.Log.Error(err)
		return subcommands.ExitFailure
	}
	util.Log.Infof("Loaded: %s", dir)

	if res, err = report.FillCveInfos(res, dir); err != nil {
		util.Log.Error(err)
		return subcommands.ExitFailure
	}
	return report.RunTui(res)
}