package redisstate_test

import (
	"context"
	"sort"
	"testing"

	"galaxy/lobby/internal/adapters/redisstate"
	"galaxy/lobby/internal/domain/common"
	"galaxy/lobby/internal/ports"

	"github.com/alicebob/miniredis/v2"
	"github.com/redis/go-redis/v9"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func newGameTurnStatsStore(t *testing.T) (*redisstate.GameTurnStatsStore, *miniredis.Miniredis) {
	t.Helper()
	server := miniredis.RunT(t)
	client := redis.NewClient(&redis.Options{Addr: server.Addr()})
	t.Cleanup(func() { _ = client.Close() })

	store, err := redisstate.NewGameTurnStatsStore(client)
	require.NoError(t, err)
	return store, server
}

func TestGameTurnStatsStoreSaveInitialFreezesValues(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-1")

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-a", Planets: 3, Population: 100, ShipsBuilt: 7},
	}))

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-a", Planets: 99, Population: 9999, ShipsBuilt: 999},
	}))

	aggregate, err := store.Load(ctx, gameID)
	require.NoError(t, err)
	require.Len(t, aggregate.Players, 1)
	assert.Equal(t, int64(3), aggregate.Players[0].InitialPlanets)
	assert.Equal(t, int64(100), aggregate.Players[0].InitialPopulation)
	assert.Equal(t, int64(7), aggregate.Players[0].InitialShipsBuilt)
	assert.Equal(t, int64(3), aggregate.Players[0].MaxPlanets)
	assert.Equal(t, int64(100), aggregate.Players[0].MaxPopulation)
	assert.Equal(t, int64(7), aggregate.Players[0].MaxShipsBuilt)
}

func TestGameTurnStatsStoreUpdateMaxRaisesOnly(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-2")

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-a", Planets: 3, Population: 100, ShipsBuilt: 7},
	}))

	require.NoError(t, store.UpdateMax(ctx, gameID, []ports.PlayerObservedStats{
		{UserID: "user-a", Planets: 5, Population: 80, ShipsBuilt: 9},
	}))

	require.NoError(t, store.UpdateMax(ctx, gameID, []ports.PlayerObservedStats{
		{UserID: "user-a", Planets: 4, Population: 60, ShipsBuilt: 8},
	}))

	aggregate, err := store.Load(ctx, gameID)
	require.NoError(t, err)
	require.Len(t, aggregate.Players, 1)
	assert.Equal(t, int64(3), aggregate.Players[0].InitialPlanets)
	assert.Equal(t, int64(100), aggregate.Players[0].InitialPopulation)
	assert.Equal(t, int64(7), aggregate.Players[0].InitialShipsBuilt)
	assert.Equal(t, int64(5), aggregate.Players[0].MaxPlanets)
	assert.Equal(t, int64(100), aggregate.Players[0].MaxPopulation)
	assert.Equal(t, int64(9), aggregate.Players[0].MaxShipsBuilt)
}

func TestGameTurnStatsStoreUpdateMaxBeforeSaveInitial(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-3")

	require.NoError(t, store.UpdateMax(ctx, gameID, []ports.PlayerObservedStats{
		{UserID: "user-a", Planets: 4, Population: 50, ShipsBuilt: 1},
	}))

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-a", Planets: 99, Population: 99, ShipsBuilt: 99},
	}))

	aggregate, err := store.Load(ctx, gameID)
	require.NoError(t, err)
	require.Len(t, aggregate.Players, 1)
	assert.Equal(t, int64(4), aggregate.Players[0].InitialPlanets)
	assert.Equal(t, int64(50), aggregate.Players[0].InitialPopulation)
	assert.Equal(t, int64(1), aggregate.Players[0].InitialShipsBuilt)
	assert.Equal(t, int64(4), aggregate.Players[0].MaxPlanets)
	assert.Equal(t, int64(50), aggregate.Players[0].MaxPopulation)
	assert.Equal(t, int64(1), aggregate.Players[0].MaxShipsBuilt)
}

func TestGameTurnStatsStoreLoadEmpty(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	gameID := common.GameID("game-stats-empty")

	aggregate, err := store.Load(context.Background(), gameID)
	require.NoError(t, err)
	assert.Equal(t, gameID, aggregate.GameID)
	assert.Empty(t, aggregate.Players)
}

func TestGameTurnStatsStoreLoadSortsByUserID(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-sorted")

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-c", Planets: 1, Population: 1, ShipsBuilt: 1},
		{UserID: "user-a", Planets: 2, Population: 2, ShipsBuilt: 2},
		{UserID: "user-b", Planets: 3, Population: 3, ShipsBuilt: 3},
	}))

	aggregate, err := store.Load(ctx, gameID)
	require.NoError(t, err)
	require.Len(t, aggregate.Players, 3)

	got := []string{aggregate.Players[0].UserID, aggregate.Players[1].UserID, aggregate.Players[2].UserID}
	expected := []string{"user-a", "user-b", "user-c"}
	require.True(t, sort.StringsAreSorted(got))
	assert.Equal(t, expected, got)
}

func TestGameTurnStatsStoreDeleteRemovesEverything(t *testing.T) {
	store, server := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-del")

	require.NoError(t, store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "user-a", Planets: 1, Population: 1, ShipsBuilt: 1},
		{UserID: "user-b", Planets: 2, Population: 2, ShipsBuilt: 2},
	}))

	require.NoError(t, store.Delete(ctx, gameID))

	aggregate, err := store.Load(ctx, gameID)
	require.NoError(t, err)
	assert.Empty(t, aggregate.Players)

	keyspace := redisstate.Keyspace{}
	assert.False(t, server.Exists(keyspace.GameTurnStatsByGame(gameID)))
	assert.False(t, server.Exists(keyspace.GameTurnStat(gameID, "user-a")))
	assert.False(t, server.Exists(keyspace.GameTurnStat(gameID, "user-b")))
}

func TestGameTurnStatsStoreDeleteIsIdempotent(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-del-noop")

	require.NoError(t, store.Delete(ctx, gameID))
	require.NoError(t, store.Delete(ctx, gameID))
}

func TestGameTurnStatsStoreRejectsInvalidInputs(t *testing.T) {
	store, _ := newGameTurnStatsStore(t)
	ctx := context.Background()
	gameID := common.GameID("game-stats-bad")

	err := store.SaveInitial(ctx, gameID, []ports.PlayerInitialStats{
		{UserID: "", Planets: 1, Population: 1, ShipsBuilt: 1},
	})
	assert.Error(t, err)

	err = store.UpdateMax(ctx, gameID, []ports.PlayerObservedStats{
		{UserID: "user-a", Planets: -1, Population: 1, ShipsBuilt: 1},
	})
	assert.Error(t, err)

	_, err = store.Load(ctx, common.GameID(""))
	assert.Error(t, err)
}