package perfdata

import (
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"nocternity.net/gomonop/pkg/status"
)

func TestNewNoValue(t *testing.T) {
	const label = "label"
	const units = UomNone

	out := New(label, units, "")

	assert.Equal(t, label, out.Label)
	assert.Equal(t, units, out.units)
	assert.Equal(t, perfDataBits(0), out.bits)
	assert.Equal(t, "U", out.value)
	// min, max, warn and crit are meaningless here
}

func TestNewValidValue(t *testing.T) {
	const label = "label"
	const units = UomNone
	const value = "1234"

	out := New(label, units, value)

	assert.Equal(t, label, out.Label)
	assert.Equal(t, units, out.units)
	assert.Equal(t, perfDataBits(0), out.bits)
	assert.Equal(t, value, out.value)
	// min, max, warn and crit are meaningless here
}

func TestNewInvalidValue(t *testing.T) {
	assert.Panics(t, func() { New("label", UomNone, "nope") })
}

func TestSetWarn(t *testing.T) {
	rangeValue := Range{start: "A", end: "B"}
	rangeStr := rangeValue.String()

	data := PerfData{}
	data.SetWarn(&rangeValue)

	assert.True(t, data.bits&PDatWarn != 0)
	assert.Equal(t, rangeStr, data.warn.String())
}

func TestSetWarnNil(t *testing.T) {
	data := PerfData{}
	data.SetWarn(nil)
	assert.Equal(t, perfDataBits(0), data.bits&PDatWarn)
}

func TestSetWarnTwice(t *testing.T) {
	range1Value := Range{start: "A", end: "B"}
	range2Value := Range{start: "C", end: "D"}
	range2Str := range2Value.String()
	require.NotEqual(t, range2Str, range1Value.String())

	data := PerfData{}
	data.SetWarn(&range1Value)
	data.SetWarn(&range2Value)

	assert.True(t, data.bits&PDatWarn != 0)
	assert.Equal(t, range2Str, data.warn.String())
}

func TestSetWarnClear(t *testing.T) {
	range1Value := Range{start: "A", end: "B"}

	data := PerfData{}
	data.SetWarn(&range1Value)
	data.SetWarn(nil)

	assert.Equal(t, perfDataBits(0), data.bits&PDatWarn)
}

func TestSetCrit(t *testing.T) {
	rangeValue := Range{start: "A", end: "B"}
	rangeStr := rangeValue.String()

	data := PerfData{}
	data.SetCrit(&rangeValue)

	assert.True(t, data.bits&PDatCrit != 0)
	assert.Equal(t, rangeStr, data.crit.String())
}

func TestSetCritNil(t *testing.T) {
	data := PerfData{}
	data.SetCrit(nil)
	assert.Equal(t, perfDataBits(0), data.bits&PDatCrit)
}

func TestSetCritTwice(t *testing.T) {
	range1Value := Range{start: "A", end: "B"}
	range2Value := Range{start: "C", end: "D"}
	range2Str := range2Value.String()
	require.NotEqual(t, range2Str, range1Value.String())

	data := PerfData{}
	data.SetCrit(&range1Value)
	data.SetCrit(&range2Value)

	assert.True(t, data.bits&PDatCrit != 0)
	assert.Equal(t, range2Str, data.crit.String())
}

func TestSetCritClear(t *testing.T) {
	range1Value := Range{start: "A", end: "B"}

	data := PerfData{}
	data.SetCrit(&range1Value)
	data.SetCrit(nil)

	assert.Equal(t, perfDataBits(0), data.bits&PDatCrit)
}

func TestSetMin(t *testing.T) {
	const min = "100"

	data := PerfData{}
	data.SetMin(min)

	assert.True(t, data.bits&PDatMin != 0)
	assert.Equal(t, min, data.min)
}

func TestSetMinInvalid(t *testing.T) {
	data := PerfData{}
	assert.Panics(t, func() { data.SetMin("nope") })
}

func TestSetMinTwice(t *testing.T) {
	data := PerfData{}
	data.SetMin("100")
	data.SetMin("200")
	assert.Equal(t, "200", data.min)
	assert.True(t, data.bits&PDatMin != 0)
}

func TestSetMax(t *testing.T) {
	const max = "100"

	data := PerfData{}
	data.SetMax(max)

	assert.True(t, data.bits&PDatMax != 0)
	assert.Equal(t, max, data.max)
}

func TestSetMaxInvalid(t *testing.T) {
	data := PerfData{}
	assert.Panics(t, func() { data.SetMax("nope") })
}

func TestSetMaxTwice(t *testing.T) {
	data := PerfData{}
	data.SetMax("100")
	data.SetMax("200")
	assert.Equal(t, "200", data.max)
	assert.True(t, data.bits&PDatMax != 0)
}

func TestCheck(t *testing.T) {
	warnRange := RangeMinMax("0", "10").Inside()
	critRange := RangeMinMax("1", "9").Inside()

	type Test struct {
		in  string
		out status.Status
	}

	tests := []Test{
		{in: "moo", out: status.StatusUnknown},
		{in: "-1", out: status.StatusOK},
		{in: "0", out: status.StatusWarning},
		{in: "1", out: status.StatusCritical},
		{in: "9", out: status.StatusCritical},
		{in: "10", out: status.StatusWarning},
		{in: "11", out: status.StatusOK},
	}
	for _, test := range tests {
		pdat := PerfData{
			value: test.in,
			bits:  PDatCrit | PDatWarn,
			warn:  *warnRange,
			crit:  *critRange,
		}
		assert.Equal(t, test.out, pdat.GetStatus())
	}
}

func TestString(t *testing.T) {
	type Test struct {
		PerfData
		expected string
	}

	range1 := Range{start: "A", end: "B"}
	range2 := Range{start: "C", end: "D"}

	tests := []Test{
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  perfDataBits(0),
				value: "1234",
			},
			"label=1234;;;;",
		},
		{
			PerfData{
				Label: "la=bel",
				units: UomNone,
				bits:  perfDataBits(0),
				value: "1234",
			},
			"'la=bel'=1234;;;;",
		},
		{
			PerfData{
				Label: "la bel",
				units: UomNone,
				bits:  perfDataBits(0),
				value: "1234",
			},
			"'la bel'=1234;;;;",
		},
		{
			PerfData{
				Label: "la\"bel",
				units: UomNone,
				bits:  perfDataBits(0),
				value: "1234",
			},
			"'la\"bel'=1234;;;;",
		},
		{
			PerfData{
				Label: "la'bel",
				units: UomNone,
				bits:  perfDataBits(0),
				value: "1234",
			},
			"'la''bel'=1234;;;;",
		},
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  PDatWarn,
				value: "1234",
				warn:  range1,
			},
			"label=1234;" + range1.String() + ";;;",
		},
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  PDatCrit,
				value: "1234",
				crit:  range1,
			},
			"label=1234;;" + range1.String() + ";;",
		},
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  PDatWarn | PDatCrit,
				value: "1234",
				warn:  range1,
				crit:  range2,
			},
			"label=1234;" + range1.String() + ";" + range2.String() + ";;",
		},
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  PDatMin,
				value: "1234",
				min:   "X",
			},
			"label=1234;;;X;",
		},
		{
			PerfData{
				Label: "label",
				units: UomNone,
				bits:  PDatMax,
				value: "1234",
				max:   "Y",
			},
			"label=1234;;;;Y",
		},
	}

	for _, units := range []UnitOfMeasurement{UomSeconds, UomPercent, UomBytes, UomKilobytes, UomMegabytes, UomGigabytes, UomTerabytes, UomCounter} {
		tests = append(tests, Test{
			PerfData{
				Label: "label",
				units: units,
				bits:  perfDataBits(0),
				value: "1234",
			},
			fmt.Sprintf("label=1234%s;;;;", units),
		})
	}

	for _, test := range tests {
		assert.Equal(t, test.expected, test.PerfData.String())
	}
}