// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package audit

import (
	"sort"

	"github.com/maruel/subcommands"

	"infra/cmd/shivas/utils"
	"infra/cmdsupport/cmdlib"
)

// LoglsCmd prints previous audit runs' info.
var LoglsCmd = &subcommands.Command{
	UsageLine: "ls-logs",
	ShortDesc: "List log of previous audits on this machine",
	LongDesc: `Lists the details of the previous audit runs on the machine

The index of each log is sorted by time from older to newer,
so that the logs generated by rerun won't affect the previous run's index.

The output of ls-logs are sorted by time reversly for easy check,
i.e. newest log is listed first.
	`,
	CommandRun: func() subcommands.CommandRun {
		c := &logls{}
		// Attempt to use home dir for logs, failing which use /tmp
		c.Flags.StringVar(&c.logDir, "log-dir", getLogDir(), "Dir to store logs for any runs of scan.")
		c.Flags.IntVar(&c.limit, "limit", 20, "Limit to latest")
		c.Flags.IntVar(&c.index, "index", -1, `Index of the log. When set the statistics
of that particular run are returned, including infos about successful and failed assets.`)
		return c
	},
}

type logls struct {
	subcommands.CommandRunBase
	logDir string
	limit  int
	index  int
}

func (c *logls) Run(a subcommands.Application, args []string, env subcommands.Env) int {
	if err := c.innerRun(a, args, env); err != nil {
		cmdlib.PrintError(a, err)
		return 1
	}
	return 0
}

func (c *logls) innerRun(a subcommands.Application, args []string, env subcommands.Env) error {
	logs, err := utils.ListLogs(c.logDir)
	if err != nil {
		return err
	}
	sort.Sort(logs)
	if c.index >= 0 && c.index < len(logs) {
		utils.PrintLogStatsAndResult(logs[c.index], c.index)
	} else {
		utils.PrintLogStats(logs, c.limit, true)
	}
	return nil
}