package config

import (
	"bytes"
	"encoding/json"
	"io/ioutil"
	"net/http"
	"time"

	"github.com/heroiclabs/nakama-common/runtime"
)

var (
	BackendBaseURL = "http://host.docker.internal:9991/api/internal" // 默认值
	InternalAPIKey = "bindbox-internal-secret-2024"                  // 必须与后端匹配
)

var httpClient = &http.Client{
	Timeout: 5 * time.Second,
}

// MakeInternalRequest 发送带认证的内部API请求的辅助函数
func MakeInternalRequest(method, url string, body []byte) (*http.Response, error) {
	req, err := http.NewRequest(method, url, bytes.NewBuffer(body))
	if err != nil {
		return nil, err
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Internal-Key", InternalAPIKey)
	return httpClient.Do(req)
}

type MinesweeperConfig struct {
	GridSize         int             `json:"grid_size"`
	BombCount        int             `json:"bomb_count"`
	ItemMin          int             `json:"item_min"`
	ItemMax          int             `json:"item_max"`
	HPInit           int             `json:"hp_init"`
	MatchPlayerCount int             `json:"match_player_count"`
	EnabledItems     map[string]bool `json:"enabled_items"`
	ItemWeights      map[string]int  `json:"item_weights"`
	CharacterHP      map[string]int  `json:"character_hp"`  // 每个角色的独立HP配置
	TurnDuration     int             `json:"turn_duration"` // 每回合的限时（秒）
}

func GetMinesweeperConfig(logger runtime.Logger) *MinesweeperConfig {
	url := BackendBaseURL + "/game/minesweeper/config"
	logger.Info("Fetching minesweeper config from: %s", url)

	resp, err := MakeInternalRequest("GET", url, nil)
	if err != nil {
		logger.Error("Network error fetching config (check BackendBaseURL): %v", err)
		return nil
	}
	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		logger.Error("Backend config API returned status: %d (URL: %s)", resp.StatusCode, url)
		return nil
	}

	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		logger.Error("Failed to read config response body: %v", err)
		return nil
	}

	var config MinesweeperConfig
	if err := json.Unmarshal(body, &config); err != nil {
		logger.Error("Failed to parse minesweeper config: %v. Raw body: %s", err, string(body))
		return nil
	}

	return &config
}

type VerifyTicketResponse struct {
	Valid          bool   `json:"valid"`
	UserID         string `json:"user_id"`
	RemainingTimes int    `json:"remaining_times"`
}

type SettleGameResponse struct {
	Success bool   `json:"success"`
	Reward  string `json:"reward"`
}

// SettlePlayerRecord 单个玩家的结算数据
type SettlePlayerRecord struct {
	UserID          int64  `json:"user_id"`
	Ticket          string `json:"ticket"`
	Win             bool   `json:"win"`
	Rank            int    `json:"rank"`
	Score           int    `json:"score"`
	DamageDealt     int    `json:"damage_dealt"`
	DamageTaken     int    `json:"damage_taken"`
	Kills           int    `json:"kills"`
	ChestsCollected int    `json:"chests_collected"`
	RoundsSurvived  int    `json:"rounds_survived"`
}

// SettleGameWithBackend 批量结算整局所有玩家（替换旧版单人结算）
func SettleGameWithBackend(logger runtime.Logger, matchID, gameType string, totalRounds int, players []SettlePlayerRecord) {
	logger.Info("Settling game with backend: match=%s, type=%s, players=%d", matchID, gameType, len(players))

	reqBody, _ := json.Marshal(map[string]interface{}{
		"match_id":     matchID,
		"game_type":    gameType,
		"total_rounds": totalRounds,
		"players":      players,
	})

	go func() {
		resp, err := MakeInternalRequest("POST", BackendBaseURL+"/game/settle", reqBody)
		if err != nil {
			logger.Error("Failed to call backend settle API: %v", err)
			return
		}
		defer resp.Body.Close()

		if resp.StatusCode != 200 {
			logger.Error("Backend settle returned non-200: %d", resp.StatusCode)
		} else {
			logger.Info("Game settled successfully with backend")
		}
	}()
}
type GameTokenInfo struct {
	Valid    bool   `json:"valid"`
	UserID   int64  `json:"user_id"`
	Username string `json:"username"`
	Avatar   string `json:"avatar"`
	GameType string `json:"game_type"`
	Ticket   string `json:"ticket"`
	Error    string `json:"error"`
}

// ValidateGameToken 向后端验证游戏Token并返回用户信息
func ValidateGameToken(logger runtime.Logger, gameToken string) *GameTokenInfo {
	logger.Info("Validating game token with backend")

	reqBody, _ := json.Marshal(map[string]string{
		"game_token": gameToken,
	})

	resp, err := MakeInternalRequest("POST", BackendBaseURL+"/game/validate-token", reqBody)
	if err != nil {
		logger.Error("Failed to call backend validate-token API: %v", err)
		return nil
	}
	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		logger.Error("Backend validate-token returned non-200 status: %d", resp.StatusCode)
		return nil
	}

	body, _ := ioutil.ReadAll(resp.Body)
	var result GameTokenInfo
	if err := json.Unmarshal(body, &result); err != nil {
		logger.Error("Failed to parse validate-token response: %v", err)
		return nil
	}

	if !result.Valid {
		logger.Warn("Game token invalid: %s", result.Error)
		return nil
	}

	return &result
}

// GetBackendBaseURL 允许 main.go 从环境变量更新基础URL
func SetBackendBaseURL(url string) {
	BackendBaseURL = url
}

func GetBackendBaseURL() string {
	return BackendBaseURL
}