package handler

import (
	"strconv"
	"time"

	"carrot_bbs/internal/dto"
	"carrot_bbs/internal/pkg/response"
	"carrot_bbs/internal/service"

	"github.com/gin-gonic/gin"
)

// AdminLogHandler 管理后台日志处理器
type AdminLogHandler struct {
	operationLogService  service.OperationLogService
	loginLogService      service.LoginLogService
	dataChangeLogService service.DataChangeLogService
}

// NewAdminLogHandler 创建管理后台日志处理器
func NewAdminLogHandler(
	operationLogService service.OperationLogService,
	loginLogService service.LoginLogService,
	dataChangeLogService service.DataChangeLogService,
) *AdminLogHandler {
	return &AdminLogHandler{
		operationLogService:  operationLogService,
		loginLogService:      loginLogService,
		dataChangeLogService: dataChangeLogService,
	}
}

// GetOperationLogs 获取操作日志列表
// GET /api/v1/admin/logs/operations
func (h *AdminLogHandler) GetOperationLogs(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	filters := dto.LogFilter{
		UserID:     c.Query("user_id"),
		Operation:  c.Query("operation"),
		TargetType: c.Query("target_type"),
		TargetID:   c.Query("target_id"),
		Status:     c.Query("status"),
		IP:         c.Query("ip"),
		StartTime:  c.Query("start_time"),
		EndTime:    c.Query("end_time"),
	}

	logs, total, err := h.operationLogService.GetOperationLogs(c.Request.Context(), filters, page, pageSize)
	if err != nil {
		response.HandleError(c, err, "failed to get operation logs")
		return
	}

	response.Success(c, gin.H{
		"logs": logs,
		"pagination": gin.H{
			"page":      page,
			"page_size": pageSize,
			"total":     total,
		},
	})
}

// GetLoginLogs 获取登录日志列表
// GET /api/v1/admin/logs/logins
func (h *AdminLogHandler) GetLoginLogs(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	filters := dto.LoginFilter{
		UserID:     c.Query("user_id"),
		Event:      c.Query("event"),
		Result:     c.Query("result"),
		FailReason: c.Query("fail_reason"),
		LoginType:  c.Query("login_type"),
		IP:         c.Query("ip"),
	}

	if startTime := c.Query("start_time"); startTime != "" {
		if t, err := time.Parse(time.RFC3339, startTime); err == nil {
			filters.StartTime = t
		}
	}

	if endTime := c.Query("end_time"); endTime != "" {
		if t, err := time.Parse(time.RFC3339, endTime); err == nil {
			filters.EndTime = t
		}
	}

	logs, total, err := h.loginLogService.GetLoginLogs(c.Request.Context(), filters, page, pageSize)
	if err != nil {
		response.HandleError(c, err, "failed to get login logs")
		return
	}

	response.Success(c, gin.H{
		"logs": logs,
		"pagination": gin.H{
			"page":      page,
			"page_size": pageSize,
			"total":     total,
		},
	})
}

// GetDataChangeLogs 获取数据变更日志列表
// GET /api/v1/admin/logs/data-changes
func (h *AdminLogHandler) GetDataChangeLogs(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	pageSize, _ := strconv.Atoi(c.DefaultQuery("page_size", "20"))

	filters := dto.DataChangeFilter{
		UserID:       c.Query("user_id"),
		OperatorID:   c.Query("operator_id"),
		ChangeType:   c.Query("change_type"),
		TargetType:   c.Query("target_type"),
		OperatorType: c.Query("operator_type"),
		IP:           c.Query("ip"),
		StartTime:    c.Query("start_time"),
		EndTime:      c.Query("end_time"),
	}

	logs, total, err := h.dataChangeLogService.GetDataChangeLogs(c.Request.Context(), filters, page, pageSize)
	if err != nil {
		response.HandleError(c, err, "failed to get data change logs")
		return
	}

	response.Success(c, gin.H{
		"logs": logs,
		"pagination": gin.H{
			"page":      page,
			"page_size": pageSize,
			"total":     total,
		},
	})
}

// GetLogStatistics 获取日志统计
// GET /api/v1/admin/logs/statistics
func (h *AdminLogHandler) GetLogStatistics(c *gin.Context) {
	startTime := c.DefaultQuery("start_time", "")
	endTime := c.DefaultQuery("end_time", "")

	operationStats, err := h.operationLogService.GetStatistics(c.Request.Context(), startTime, endTime)
	if err != nil {
		response.HandleError(c, err, "failed to get operation log statistics")
		return
	}

	loginStats, err := h.loginLogService.GetStatistics(c.Request.Context(), startTime, endTime)
	if err != nil {
		response.HandleError(c, err, "failed to get login log statistics")
		return
	}

	dataChangeStats, err := h.dataChangeLogService.GetStatistics(c.Request.Context(), startTime, endTime)
	if err != nil {
		response.HandleError(c, err, "failed to get data change log statistics")
		return
	}

	response.Success(c, gin.H{
		"operation_logs":   operationStats,
		"login_logs":       loginStats,
		"data_change_logs": dataChangeStats,
	})
}

// ExportLogs 导出日志
// GET /api/v1/admin/logs/export
func (h *AdminLogHandler) ExportLogs(c *gin.Context) {
	logType := c.Query("type")
	startTime := c.Query("start_time")
	endTime := c.Query("end_time")

	switch logType {
	case "operation":
		logs, _, err := h.operationLogService.GetOperationLogsByTimeRange(c.Request.Context(), startTime, endTime, 1, 10000)
		if err != nil {
			response.HandleError(c, err, "failed to export operation logs")
			return
		}
		response.Success(c, gin.H{
			"type": "operation",
			"logs": logs,
		})
	case "login":
		logs, _, err := h.loginLogService.GetLoginLogs(c.Request.Context(), dto.LoginFilter{}, 1, 10000)
		if err != nil {
			response.HandleError(c, err, "failed to export login logs")
			return
		}
		response.Success(c, gin.H{
			"type": "login",
			"log":  logs,
		})
	case "data_change":
		logs, _, err := h.dataChangeLogService.GetDataChangeLogs(c.Request.Context(), dto.DataChangeFilter{}, 1, 10000)
		if err != nil {
			response.HandleError(c, err, "failed to export data change logs")
			return
		}
		response.Success(c, gin.H{
			"type": "data_change",
			"log":  logs,
		})
	default:
		response.Error(c, 400, "invalid log type")
	}
}