package logger

import (
	"fmt"
	"strconv"
	"strings"
	"sync"
	"time"
)

// LogEntry 日志条目
type LogEntry struct {
	Timestamp time.Time `json:"timestamp"`
	Level     string    `json:"level"`
	Message   string    `json:"message"`
	Email     string    `json:"email,omitempty"`
	Module    string    `json:"module,omitempty"`
}

// 日志存储
var (
	logs      = make([]LogEntry, 0, 1000)
	logsMu    sync.RWMutex
	listeners = make(map[string]chan LogEntry)
	listMu    sync.RWMutex
)

// AddListener 添加日志监听器
func AddListener(id string) chan LogEntry {
	listMu.Lock()
	defer listMu.Unlock()
	ch := make(chan LogEntry, 100)
	listeners[id] = ch
	return ch
}

// RemoveListener 移除日志监听器
func RemoveListener(id string) {
	listMu.Lock()
	defer listMu.Unlock()
	if ch, ok := listeners[id]; ok {
		close(ch)
		delete(listeners, id)
	}
}

// broadcast 广播日志
func broadcast(entry LogEntry) {
	listMu.RLock()
	defer listMu.RUnlock()
	for _, ch := range listeners {
		select {
		case ch <- entry:
		default:
		}
	}
}

// log 记录日志
func log(level, message, email, module string) {
	entry := LogEntry{
		Timestamp: time.Now(),
		Level:     level,
		Message:   message,
		Email:     email,
		Module:    module,
	}

	logsMu.Lock()
	if len(logs) >= 1000 {
		logs = logs[100:]
	}
	logs = append(logs, entry)
	logsMu.Unlock()

	broadcast(entry)

	// 打印到控制台 (带时间戳和颜色)
	timestamp := entry.Timestamp.Format("15:04:05")

	// ANSI 颜色代码
	colorReset := "\033[0m"
	colorGray := "\033[90m"
	colorGreen := "\033[32m"
	colorRed := "\033[31m"
	colorYellow := "\033[33m"
	colorCyan := "\033[36m"

	// Team 颜色列表（用于区分不同 Team）
	teamColors := []string{
		"\033[38;5;39m",  // 亮蓝
		"\033[38;5;208m", // 橙色
		"\033[38;5;141m", // 紫色
		"\033[38;5;48m",  // 青绿
		"\033[38;5;197m", // 粉红
		"\033[38;5;226m", // 亮黄
		"\033[38;5;87m",  // 青色
		"\033[38;5;156m", // 浅绿
		"\033[38;5;219m", // 浅粉
		"\033[38;5;117m", // 天蓝
	}

	// 从消息中提取 Team 编号
	teamColor := ""
	if strings.Contains(message, "[Team ") {
		start := strings.Index(message, "[Team ")
		if start >= 0 {
			end := strings.Index(message[start:], "]")
			if end > 0 {
				teamStr := message[start+6 : start+end]
				if teamNum, err := strconv.Atoi(teamStr); err == nil && teamNum > 0 {
					teamColor = teamColors[(teamNum-1)%len(teamColors)]
				}
			}
		}
	}

	prefix := ""
	color := ""
	switch level {
	case "info":
		prefix = "INFO   "
		color = colorCyan
	case "success":
		prefix = "SUCCESS"
		color = colorGreen
	case "error":
		prefix = "ERROR  "
		color = colorRed
	case "warning":
		prefix = "WARN   "
		color = colorYellow
	}

	// 模块名固定宽度（8字符）
	moduleStr := module
	if len(moduleStr) < 8 {
		moduleStr = moduleStr + strings.Repeat(" ", 8-len(moduleStr))
	} else if len(moduleStr) > 8 {
		moduleStr = moduleStr[:8]
	}

	// 如果是 Team 相关日志，消息使用 Team 颜色
	msgColor := colorReset
	if teamColor != "" {
		msgColor = teamColor
	}

	if email != "" {
		// 截断长邮箱，保持对齐
		emailDisplay := email
		if len(emailDisplay) > 35 {
			emailDisplay = emailDisplay[:32] + "..."
		}
		fmt.Printf("%s%s%s %s[%s]%s [%s] %s%s%s\n",
			colorGray, timestamp, colorReset,
			color, prefix, colorReset,
			moduleStr, msgColor, message, colorReset)
	} else {
		fmt.Printf("%s%s%s %s[%s]%s [%s] %s%s%s\n",
			colorGray, timestamp, colorReset,
			color, prefix, colorReset,
			moduleStr, msgColor, message, colorReset)
	}
}

// Info 记录信息日志
func Info(message, email, module string) {
	log("info", message, email, module)
}

// Success 记录成功日志
func Success(message, email, module string) {
	log("success", message, email, module)
}

// Error 记录错误日志
func Error(message, email, module string) {
	log("error", message, email, module)
}

// Warning 记录警告日志
func Warning(message, email, module string) {
	log("warning", message, email, module)
}

// GetLogs 获取日志
func GetLogs(limit int) []LogEntry {
	logsMu.RLock()
	defer logsMu.RUnlock()

	if limit <= 0 || limit > len(logs) {
		limit = len(logs)
	}

	start := len(logs) - limit
	if start < 0 {
		start = 0
	}

	result := make([]LogEntry, limit)
	copy(result, logs[start:])
	return result
}

// ClearLogs 清空日志
func ClearLogs() {
	logsMu.Lock()
	defer logsMu.Unlock()
	logs = make([]LogEntry, 0, 1000)
}