package middleware

import (
	"fmt"
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/subconverter-go/internal/logging"
)

// SetupLogging 设置日志中间件
// 记录所有HTTP请求的详细信息
func SetupLogging(logger *logging.Logger) fiber.Handler {
	return func(c *fiber.Ctx) error {
		start := time.Now()

		// 处理请求
		err := c.Next()

		// 计算请求耗时
		duration := time.Since(start)

		// 记录请求日志
		logger.WithFields(map[string]interface{}{
			"method":     c.Method(),
			"path":       c.Path(),
			"ip":         c.IP(),
			"user_agent": c.Get("User-Agent"),
			"status":     c.Response().StatusCode(),
			"duration":   duration.Milliseconds(),
			"size":       len(c.Response().Body()),
		}).Infof("HTTP %s %s - %d (%v)", c.Method(), c.Path(), c.Response().StatusCode(), duration)

		return err
	}
}

// SetupRequestID 设置请求ID中间件
// 为每个请求生成唯一ID，便于追踪和调试
func SetupRequestID() fiber.Handler {
	return func(c *fiber.Ctx) error {
		// 生成请求ID
		requestID := generateRequestID()

		// 设置到响应头
		c.Set("X-Request-ID", requestID)

		// 存储到上下文
		c.Locals("requestID", requestID)

		return c.Next()
	}
}

// generateRequestID 生成请求ID
func generateRequestID() string {
	// 使用时间戳和随机数生成唯一ID
	return fmt.Sprintf("%d-%d", time.Now().UnixNano(), time.Now().Nanosecond()%1000000)
}