package yqlib

import (
	"bufio"
	"fmt"
	"testing"

	"github.com/mikefarah/yq/v4/test"
)

var samplePropertiesYaml = `# block comments don't come through
person: # neither do comments on maps
    name: Mike # comments on values appear
    pets: 
    - cat # comments on array values appear
    food: [pizza] # comments on arrays do not
emptyArray: []
emptyMap: []
`

var expectedProperties = `# comments on values appear
person.name = Mike

# comments on array values appear
person.pets.0 = cat
person.food.0 = pizza
`

var expectedPropertiesNoComments = `person.name = Mike
person.pets.0 = cat
person.food.0 = pizza
`

var expectedPropertiesWithEmptyMapsAndArrays = `# comments on values appear
person.name = Mike

# comments on array values appear
person.pets.0 = cat
person.food.0 = pizza
emptyArray = 
emptyMap = 
`

var propertyScenarios = []formatScenario{
	{
		description:    "Encode properties",
		subdescription: "Note that empty arrays and maps are not encoded by default.",
		input:          samplePropertiesYaml,
		expected:       expectedProperties,
	},
	{
		description: "Encode properties: no comments",
		input:       samplePropertiesYaml,
		expected:    expectedPropertiesNoComments,
		expression:  `... comments = ""`,
	},
	{
		description:    "Encode properties: include empty maps and arrays",
		subdescription: "Use a yq expression to set the empty maps and sequences to your desired value.",
		expression:     `(.. | select( (tag == "!!map" or tag =="!!seq") and length == 0)) = ""`,
		input:          samplePropertiesYaml,
		expected:       expectedPropertiesWithEmptyMapsAndArrays,
	},
}

func documentPropertyScenario(t *testing.T, w *bufio.Writer, i interface{}) {
	s := i.(formatScenario)
	writeOrPanic(w, fmt.Sprintf("## %v\n", s.description))

	if s.subdescription != "" {
		writeOrPanic(w, s.subdescription)
		writeOrPanic(w, "\n\n")
	}

	writeOrPanic(w, "Given a sample.yml file of:\n")
	writeOrPanic(w, fmt.Sprintf("```yaml\n%v\n```\n", s.input))

	writeOrPanic(w, "then\n")

	expression := s.expression
	if expression == "" {
		expression = "."
	}

	if s.indent == 2 {
		writeOrPanic(w, fmt.Sprintf("```bash\nyq -o=props '%v' sample.yml\n```\n", expression))
	} else {
		writeOrPanic(w, fmt.Sprintf("```bash\nyq -o=props -I=%v '%v' sample.yml\n```\n", s.indent, expression))
	}
	writeOrPanic(w, "will output\n")

	writeOrPanic(w, fmt.Sprintf("```properties\n%v```\n\n", processFormatScenario(s, NewPropertiesEncoder())))
}

func TestPropertyScenarios(t *testing.T) {
	for _, s := range propertyScenarios {
		test.AssertResultWithContext(t, s.expected, processFormatScenario(s, NewPropertiesEncoder()), s.description)
	}
	genericScenarios := make([]interface{}, len(propertyScenarios))
	for i, s := range propertyScenarios {
		genericScenarios[i] = s
	}
	documentScenarios(t, "usage", "properties", genericScenarios, documentPropertyScenario)
}