/*
DESCRIPTION
  raspivid_test.go tests the raspivid AVDevice.

AUTHORS
  Scott Barnard <scott@ausocean.org>

LICENSE
  Copyright (C) 2020 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  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.

  It 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
  in gpl.txt.  If not, see http://www.gnu.org/licenses.
*/

package raspivid

import (
	"bytes"
	"testing"
	"time"

	"bitbucket.org/ausocean/av/codec/codecutil"
	"bitbucket.org/ausocean/av/revid/config"
	"bitbucket.org/ausocean/utils/logging"
)

func TestIsRunning(t *testing.T) {
	const dur = 250 * time.Millisecond

	l := logging.New(logging.Debug, &bytes.Buffer{}, true) // Discard logs.
	d := New(l)

	err := d.Set(config.Config{
		Logger:     l,
		InputCodec: codecutil.H264,
	})
	if err != nil {
		t.Skipf("could not set device: %v", err)
	}

	err = d.Start()
	if err != nil {
		t.Fatalf("could not start device %v", err)
	}

	time.Sleep(dur)

	if !d.IsRunning() {
		t.Error("device isn't running, when it should be")
	}

	err = d.Stop()
	if err != nil {
		t.Error(err.Error())
	}

	time.Sleep(dur)

	if d.IsRunning() {
		t.Error("device is running, when it should not be")
	}
}

func TestGoodAWBGains(t *testing.T) {
	tests := []struct {
		gains  string
		expect bool
	}{
		{gains: "-0.6,1.7", expect: false},
		{gains: "0.6,-1.6", expect: false},
		{gains: "1.3,0.3", expect: true},
		{gains: "0.8,", expect: false},
		{gains: "0.3", expect: false},
		{gains: "0,0", expect: true},
		{gains: ",1.4", expect: false},
	}

	for i, test := range tests {
		got := goodAWBGains(test.gains)
		if got != test.expect {
			t.Errorf("did not get get expected result for test: %d\nWant: %v, Got: %v\n", i, test.expect, got)
		}
	}
}

func TestCreateArgs(t *testing.T) {
	tests := []struct {
		cfg  config.Config
		want []string
	}{
		{
			cfg: config.Config{
				Height:           1080,
				Width:            1440,
				Bitrate:          1000,
				FrameRate:        25,
				Rotation:         45,
				InputCodec:       codecutil.H264,
				Brightness:       50,
				Saturation:       20,
				Contrast:         30,
				Sharpness:        -30,
				AutoWhiteBalance: "auto",
				Exposure:         "auto",
				EV:               3,
				AWBGains:         "0.9,1.2",
				ISO:              300,
				CBR:              true,
			},
			want: []string{
				"--output", "-",
				"--nopreview",
				"--timeout", "0",
				"--width", "1440",
				"--height", "1080",
				"--bitrate", "1000000", // Convert from kbps to bps.
				"--framerate", "25",
				"--rotation", "45",
				"--brightness", "50",
				"--saturation", "20",
				"--sharpness", "-30",
				"--contrast", "30",
				"--awb", "auto",
				"--exposure", "auto",
				"--ISO", "300",
				"--codec", "H264",
				"--inline",
				"--intra", "0",
			},
		},
		{
			cfg: config.Config{
				Height:           1080,
				Width:            1440,
				Bitrate:          1000,
				FrameRate:        25,
				Rotation:         45,
				InputCodec:       codecutil.H264,
				Brightness:       50,
				Saturation:       20,
				Contrast:         30,
				Sharpness:        -30,
				AutoWhiteBalance: "off",
				Exposure:         "off",
				EV:               3,
				AWBGains:         "0.9,1.2",
				ISO:              300,
				CBR:              true,
			},
			want: []string{
				"--output", "-",
				"--nopreview",
				"--timeout", "0",
				"--width", "1440",
				"--height", "1080",
				"--bitrate", "1000000", // Convert from kbps to bps.
				"--framerate", "25",
				"--rotation", "45",
				"--brightness", "50",
				"--saturation", "20",
				"--sharpness", "-30",
				"--contrast", "30",
				"--awb", "off",
				"--exposure", "off",
				"--ISO", "300",
				"--ev", "3",
				"--awbgains", "0.9,1.2",
				"--codec", "H264",
				"--inline",
				"--intra", "0",
			},
		},
		{
			cfg: config.Config{
				Height:           1080,
				Width:            1440,
				Bitrate:          1000,
				FrameRate:        25,
				Rotation:         45,
				InputCodec:       codecutil.H264,
				Brightness:       50,
				Saturation:       20,
				Contrast:         30,
				Sharpness:        -30,
				AutoWhiteBalance: "off",
				Exposure:         "off",
				EV:               3,
				ISO:              100,
				AWBGains:         "0.9,1.2",
				CBR:              true,
			},
			want: []string{
				"--output", "-",
				"--nopreview",
				"--timeout", "0",
				"--width", "1440",
				"--height", "1080",
				"--bitrate", "1000000", // Convert from kbps to bps.
				"--framerate", "25",
				"--rotation", "45",
				"--brightness", "50",
				"--saturation", "20",
				"--sharpness", "-30",
				"--contrast", "30",
				"--awb", "off",
				"--exposure", "off",
				"--ev", "3",
				"--awbgains", "0.9,1.2",
				"--codec", "H264",
				"--inline",
				"--intra", "0",
			},
		},
	}

	for i, test := range tests {
		got, err := (&Raspivid{cfg: test.cfg}).createArgs()
		if err != nil {
			t.Fatalf("did not expect error from createArgs: %v", err)
		}

		if !cmpStrSlice(got, test.want) {
			t.Errorf("did not get expected args list for test: %d\nGot: %v\nWant: %v", i, got, test.want)
		}
	}
}

func cmpStrSlice(a, b []string) bool {
	for i, v := range a {
		if v != b[i] {
			return false
		}
	}
	return true
}