package keeper

import (
	"reflect"
	"testing"

	"github.com/pokt-network/pocket-core/codec"

	"github.com/stretchr/testify/require"

	"github.com/pokt-network/pocket-core/store/prefix"
	sdk "github.com/pokt-network/pocket-core/types"
)

func TestKeeper(t *testing.T) {
	kvs := []struct {
		key   string
		param int64
	}{
		{"key1", 10},
		{"key2", 55},
		{"key3", 182},
		{"key4", 17582},
		{"key5", 2768554},
		{"key6", 1157279},
		{"key7", 9058701},
	}
	table := sdk.NewKeyTable(
		[]byte("key1"), int64(0),
		[]byte("key2"), int64(0),
		[]byte("key3"), int64(0),
		[]byte("key4"), int64(0),
		[]byte("key5"), int64(0),
		[]byte("key6"), int64(0),
		[]byte("key7"), int64(0),
		[]byte("extra1"), bool(false),
		[]byte("extra2"), string(""),
	)
	cdc, ctx, skey, _, keeper := testComponents(t)
	store := prefix.NewStore(ctx.KVStore(skey), []byte("test/"))
	space := keeper.Subspace("test").WithKeyTable(table)
	// Set params
	for i, kv := range kvs {
		require.NotPanics(t, func() { space.Set(ctx, []byte(kv.key), kv.param) }, "space.Set panics, tc #%d", i)
	}
	// Test space.Get
	for i, kv := range kvs {
		var param int64
		require.NotPanics(t, func() { space.Get(ctx, []byte(kv.key), &param) }, "space.Get panics, tc #%d", i)
		require.Equal(t, kv.param, param, "stored param not equal, tc #%d", i)
	}
	// Test space.GetRaw
	for i, kv := range kvs {
		var param int64
		bz, _ := space.GetRaw(ctx, []byte(kv.key))
		err := cdc.UnmarshalJSON(bz, &param)
		require.Nil(t, err, "err is not nil, tc #%d", i)
		require.Equal(t, kv.param, param, "stored param not equal, tc #%d", i)
	}
	// Test store.Get equals space.Get
	for i, kv := range kvs {
		var param int64
		bz, _ := store.Get([]byte(kv.key))
		require.NotNil(t, bz, "KVStore.Get returns nil, tc #%d", i)
		err := cdc.UnmarshalJSON(bz, &param)
		require.NoError(t, err, "UnmarshalJSON returns error, tc #%d", i)
		require.Equal(t, kv.param, param, "stored param not equal, tc #%d", i)
	}
	// Test invalid space.Set
	for i, kv := range kvs {
		require.Panics(t, func() { space.Set(ctx, []byte(kv.key), true) }, "invalid space.Set not panics, tc #%d", i)
	}
	// Test GetSubspace
	for i, kv := range kvs {
		var gparam, param int64
		gspace, ok := keeper.GetSubspace("test")
		require.True(t, ok, "cannot retrieve subspace, tc #%d", i)
		require.NotPanics(t, func() { gspace.Get(ctx, []byte(kv.key), &gparam) })
		require.NotPanics(t, func() { space.Get(ctx, []byte(kv.key), &param) })
		require.Equal(t, gparam, param, "GetSubspace().Get not equal with space.Get, tc #%d", i)
		require.NotPanics(t, func() { gspace.Set(ctx, []byte(kv.key), int64(i)) })
		require.NotPanics(t, func() { space.Get(ctx, []byte(kv.key), &param) })
		require.Equal(t, int64(i), param, "GetSubspace().Set not equal with space.Get, tc #%d", i)
	}
}

func indirect(ptr interface{}) interface{} {
	return reflect.ValueOf(ptr).Elem().Interface()
}

func TestSubspace(t *testing.T) {
	cdc, ctx, key, _, keeper := testComponents(t)
	kvs := []struct {
		key   string
		param interface{}
		zero  interface{}
		ptr   interface{}
	}{
		{"string", "test", "", new(string)},
		{"bool", true, false, new(bool)},
		{"int16", int16(1), int16(0), new(int16)},
		{"int32", int32(1), int32(0), new(int32)},
		{"int64", int64(1), int64(0), new(int64)},
		{"uint16", uint16(1), uint16(0), new(uint16)},
		{"uint32", uint32(1), uint32(0), new(uint32)},
		{"uint64", uint64(1), uint64(0), new(uint64)},
		{"int", sdk.NewInt(1), *new(sdk.BigInt), new(sdk.BigInt)},
		{"uint", sdk.NewUint(1), *new(sdk.Uint), new(sdk.Uint)},
		{"dec", sdk.NewDec(1), *new(sdk.BigDec), new(sdk.BigDec)},
		{"struct", s{1}, s{0}, new(s)},
	}
	table := sdk.NewKeyTable(
		[]byte("string"), string(""),
		[]byte("bool"), bool(false),
		[]byte("int16"), int16(0),
		[]byte("int32"), int32(0),
		[]byte("int64"), int64(0),
		[]byte("uint16"), uint16(0),
		[]byte("uint32"), uint32(0),
		[]byte("uint64"), uint64(0),
		[]byte("int"), sdk.BigInt{},
		[]byte("uint"), sdk.Uint{},
		[]byte("dec"), sdk.BigDec{},
		[]byte("struct"), s{},
	)
	store := prefix.NewStore(ctx.KVStore(key), []byte("test/"))
	space := keeper.Subspace("test").WithKeyTable(table)
	// Test space.Set, space.Modified
	for i, kv := range kvs {
		sm, _ := space.Modified(ctx, []byte(kv.key))
		require.False(t, sm, "space.Modified returns true before setting, tc #%d", i)
		require.NotPanics(t, func() { space.Set(ctx, []byte(kv.key), kv.param) }, "space.Set panics, tc #%d", i)
		sm, _ = space.Modified(ctx, []byte(kv.key))
		require.True(t, sm, "space.Modified returns false after setting, tc #%d", i)
	}
	// Test space.Get, space.GetIfExists
	for i, kv := range kvs {
		require.NotPanics(t, func() { space.GetIfExists(ctx, []byte("invalid"), kv.ptr) }, "space.GetIfExists panics when no value exists, tc #%d", i)
		require.Equal(t, kv.zero, indirect(kv.ptr), "space.GetIfExists unmarshalls when no value exists, tc #%d", i)

		require.Equal(t, kv.zero, indirect(kv.ptr), "invalid space.Get unmarshalls when no value exists, tc #%d", i)

		require.NotPanics(t, func() { space.GetIfExists(ctx, []byte(kv.key), kv.ptr) }, "space.GetIfExists panics, tc #%d", i)
		require.Equal(t, kv.param, indirect(kv.ptr), "stored param not equal, tc #%d", i)
		require.NotPanics(t, func() { space.Get(ctx, []byte(kv.key), kv.ptr) }, "space.Get panics, tc #%d", i)
		require.Equal(t, kv.param, indirect(kv.ptr), "stored param not equal, tc #%d", i)

		require.Equal(t, kv.param, indirect(kv.ptr), "invalid space.Get unmarshalls when no value existt, tc #%d", i)

		//require.Panics(t, func() { space.Get(ctx, []byte(kv.key), new(invalid)) }, "invalid space.Get not panics when the pointer is different type, tc #%d", i)
	}
	// Test store.Get equals space.Get
	for i, kv := range kvs {
		bz, _ := store.Get([]byte(kv.key))
		require.NotNil(t, bz, "store.Get() returns nil, tc #%d", i)
		err := cdc.UnmarshalJSON(bz, kv.ptr)
		require.NoError(t, err, "cdc.UnmarshalJSON() returns error, tc #%d", i)
		require.Equal(t, kv.param, indirect(kv.ptr), "stored param not equal, tc #%d", i)
	}
}

type paramJSON struct {
	Param1 int64  `json:"param1,omitempty" yaml:"param1,omitempty"`
	Param2 string `json:"param2,omitempty" yaml:"param2,omitempty"`
}

func TestJSONUpdate(t *testing.T) {
	_, ctx, _, _, keeper := testComponents(t)
	key := []byte("key")
	space := keeper.Subspace("test").WithKeyTable(sdk.NewKeyTable(key, paramJSON{}))
	var param paramJSON
	_ = space.Update(ctx, key, []byte(`{"param1": "10241024"}`))
	space.Get(ctx, key, &param)
	require.Equal(t, paramJSON{10241024, ""}, param)
	_ = space.Update(ctx, key, []byte(`{"param2": "helloworld"}`))
	space.Get(ctx, key, &param)
	require.Equal(t, paramJSON{10241024, "helloworld"}, param)
	_ = space.Update(ctx, key, []byte(`{"param1": "20482048"}`))
	space.Get(ctx, key, &param)
	require.Equal(t, paramJSON{20482048, "helloworld"}, param)
	_ = space.Update(ctx, key, []byte(`{"param1": "40964096", "param2": "goodbyeworld"}`))
	space.Get(ctx, key, &param)
	require.Equal(t, paramJSON{40964096, "goodbyeworld"}, param)
}

type s struct {
	I int
}

func testComponents(t *testing.T) (*codec.LegacyAmino, sdk.Context, sdk.StoreKey, sdk.StoreKey, Keeper) {
	mkey := sdk.ParamsKey
	tkey := sdk.ParamsTKey
	ctx, keeper := createTestKeeperAndContext(t, false)
	return keeper.cdc.AminoCodec(), ctx, mkey, tkey, keeper
}
