package meta_test

import (
	"bytes"
	"encoding/hex"
	"testing"

	"git.bit5.ru/backend/meta/v5"
	"github.com/stretchr/testify/require"
)

func TestMsgpackReader(t *testing.T) {
	t.Run("reading parent", func(t *testing.T) {
		// ["blabla",[1],[2,4,6],[[10],[1024]],null]
		src := "95A6626C61626C6191019302040692910A91CD0400C0"

		expected := TestParent{
			Field1: "blabla",
			Field2: TestFoo{
				Field: 1,
			},
			Field3: []int8{2, 4, 6},
			Field4: []TestFoo{
				{Field: 10},
				{Field: 1024},
			},
		}

		data, err := hex.DecodeString(src)
		require.NoError(t, err)

		rdr := meta.NewMsgpackReader(bytes.NewReader(data))

		var actual TestParent
		readErr := actual.Read(rdr)
		require.NoError(t, readErr)
		require.EqualValues(t, expected, actual)
	})

	t.Run("reading child", func(t *testing.T) {
		// ["blabla",[1],[2,4,6],[[10],[1024]],null,"qwerty"]
		src := "96A6626C61626C6191019302040692910A91CD0400C0A6717765727479"

		expected := TestChild{
			Field: "qwerty",
			TestParent: TestParent{
				Field1: "blabla",
				Field2: TestFoo{
					Field: 1,
				},
				Field3: []int8{2, 4, 6},
				Field4: []TestFoo{
					{Field: 10},
					{Field: 1024},
				},
			},
		}

		data, err := hex.DecodeString(src)
		require.NoError(t, err)

		rdr := meta.NewMsgpackReader(bytes.NewReader(data))

		var actual TestChild
		readErr := actual.Read(rdr)
		require.NoError(t, readErr)
		require.EqualValues(t, expected, actual)
	})

	t.Run("fail reading parent as map", func(t *testing.T) {
		// {"f1":"blabla","f3":[2,4,6],"f2":{"field":1},"f4":[{"field":10},{"field":1024}]}
		src := "84a26631a6626c61626c61a2663393020406a2663281a56669656c6401a266349281a56669656c640a81a56669656c64cd0400"

		expected := TestParent{}

		data, err := hex.DecodeString(src)
		require.NoError(t, err)

		rdr := meta.NewMsgpackReader(bytes.NewReader(data))

		var actual TestParent
		readErr := actual.Read(rdr)
		require.ErrorContains(t, readErr, "field `` is not an array")
		require.EqualValues(t, expected, actual)
	})

	t.Run("fail reading parent as array with maps", func(t *testing.T) {
		// ["blabla",{"field":1},[2,4,6],[{"field":10},{"field":1024}]]
		src := "94a6626c61626c6181a56669656c6401930204069281a56669656c640a81a56669656c64cd0400"

		expected := TestParent{
			Field1: "blabla",
			Field3: []int8{},
			Field4: []TestFoo{},
		}

		data, err := hex.DecodeString(src)
		require.NoError(t, err)

		rdr := meta.NewMsgpackReader(bytes.NewReader(data))

		var actual TestParent
		readErr := actual.Read(rdr)
		require.ErrorContains(t, readErr, "field `f2` is not an array")
		require.EqualValues(t, expected, actual)
	})

	t.Run("fail reading child struct as map", func(t *testing.T) {
		// {"f":"qwerty","f1":"blabla","f3":[2,4,6],"f2":{"field":1},"f4":[{"field":10},{"field":1024}]}
		src := "85a166a6717765727479a26631a6626c61626c61a2663393020406a2663281a56669656c6401a266349281a56669656c640a81a56669656c64cd0400"

		expected := TestChild{}

		data, err := hex.DecodeString(src)
		require.NoError(t, err)

		rdr := meta.NewMsgpackReader(bytes.NewReader(data))

		var actual TestChild
		readErr := actual.Read(rdr)
		require.ErrorContains(t, readErr, "field `` is not an array")
		require.EqualValues(t, expected, actual)
	})
}