package admin

import (
	"time"

	"github.com/gofiber/fiber/v2"

	"github.com/break/junhong_cmp_fiber/internal/model/dto"
	auditquery "github.com/break/junhong_cmp_fiber/internal/query/audit"
	integrationquery "github.com/break/junhong_cmp_fiber/internal/query/integration"
	"github.com/break/junhong_cmp_fiber/pkg/errors"
	"github.com/break/junhong_cmp_fiber/pkg/response"
)

// AuditHandler 提供平台基础审计调查只读接口。
type AuditHandler struct {
	auditQuery       *auditquery.Query
	integrationQuery *integrationquery.Query
}

// NewAuditHandler 创建平台基础审计调查 Handler。
func NewAuditHandler(auditQuery *auditquery.Query, integrationQuery *integrationquery.Query) *AuditHandler {
	return &AuditHandler{auditQuery: auditQuery, integrationQuery: integrationQuery}
}

// ListEvents 查询平台全局审计事件。
// GET /api/admin/audit/events
func (h *AuditHandler) ListEvents(c *fiber.Ctx) error {
	var request dto.AuditEventListRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	from, to, err := auditTimeRange(request.CreatedFrom, request.CreatedTo)
	if err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return errors.New(errors.CodeInvalidParam)
	}
	result, err := h.auditQuery.List(c.UserContext(), auditquery.EventFilter{
		CreatedFrom: from, CreatedTo: to, Action: request.Action, Category: request.Category,
		ActorKind: request.ActorKind, ActorID: request.ActorID, Source: request.Source,
		Result: request.Result, Risk: request.Risk, ScopeType: request.ScopeType, ScopeID: request.ScopeID,
		ResourceType: request.ResourceType, ResourceID: request.ResourceID, ResourceKey: request.ResourceKey,
		RequestID: request.RequestID, CorrelationID: request.CorrelationID,
		Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// GetEvent 查询单个稳定审计事件详情。
// GET /api/admin/audit/events/:event_id
func (h *AuditHandler) GetEvent(c *fiber.Ctx) error {
	result, err := h.auditQuery.Get(c.UserContext(), c.Params("event_id"))
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// ListActorEvents 查询操作者行为时间线。
// GET /api/admin/audit/actors/:kind/:id/events
func (h *AuditHandler) ListActorEvents(c *fiber.Ctx) error {
	var request dto.AuditActorEventsRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	request.Kind, request.ID = c.Params("kind"), c.Params("id")
	from, to, err := auditTimeRange(request.CreatedFrom, request.CreatedTo)
	if err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return errors.New(errors.CodeInvalidParam)
	}
	result, err := h.auditQuery.ListActorEvents(c.UserContext(), auditquery.ActorEventFilter{
		Kind: request.Kind, ID: request.ID, Action: request.Action, Result: request.Result, Risk: request.Risk,
		ResourceType: request.ResourceType, ResourceID: request.ResourceID,
		CreatedFrom: from, CreatedTo: to, Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// SearchResources 按注册业务标识精确搜索资源。
// GET /api/admin/audit/resources/search
func (h *AuditHandler) SearchResources(c *fiber.Ctx) error {
	var request dto.AuditResourceSearchRequest
	if err := c.QueryParser(&request); err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return errors.New(errors.CodeInvalidParam)
	}
	result, err := h.auditQuery.SearchResources(c.UserContext(), auditquery.ResourceSearchFilter{
		ResourceType: request.ResourceType, Keyword: request.Keyword,
		Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// ResourceTimeline 查询资源作为任意关系参与的通用事件时间线。
// GET /api/admin/audit/resources/:resource_type/:resource_id/timeline
func (h *AuditHandler) ResourceTimeline(c *fiber.Ctx) error {
	var request dto.AuditResourceTimelineRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	request.ResourceType, request.ResourceID = c.Params("resource_type"), c.Params("resource_id")
	from, to, err := auditTimeRange(request.CreatedFrom, request.CreatedTo)
	if err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return errors.New(errors.CodeInvalidParam)
	}
	result, err := h.auditQuery.ResourceTimeline(c.UserContext(), auditquery.ResourceTimelineFilter{
		ResourceType: request.ResourceType, ResourceID: request.ResourceID,
		CreatedFrom: from, CreatedTo: to, Action: request.Action, Result: request.Result,
		Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// AgentResourceActivities 查询代理范围内的安全资源活动。
// GET /api/admin/agent/resource-activities/:resource_type/:identifier
func (h *AuditHandler) AgentResourceActivities(c *fiber.Ctx) error {
	request, err := subjectActivityRequest(c)
	if err != nil {
		return err
	}
	result, err := h.auditQuery.AgentResourceActivities(c.UserContext(), auditquery.SubjectActivityFilter{
		ResourceType: request.ResourceType, Identifier: request.Identifier,
		Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// EnterpriseResourceActivities 查询企业当前有效授权资产的安全资源活动。
// GET /api/admin/enterprise/resource-activities/:resource_type/:identifier
func (h *AuditHandler) EnterpriseResourceActivities(c *fiber.Ctx) error {
	request, err := subjectActivityRequest(c)
	if err != nil {
		return err
	}
	result, err := h.auditQuery.EnterpriseResourceActivities(c.UserContext(), auditquery.SubjectActivityFilter{
		ResourceType: request.ResourceType, Identifier: request.Identifier,
		Page: request.Page, PageSize: request.PageSize,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

func subjectActivityRequest(c *fiber.Ctx) (dto.SubjectResourceActivityRequest, error) {
	var request dto.SubjectResourceActivityRequest
	if err := c.QueryParser(&request); err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return request, errors.New(errors.CodeInvalidParam)
	}
	request.ResourceType = c.Params("resource_type")
	request.Identifier = c.Params("identifier")
	if request.ResourceType == "" || request.Identifier == "" {
		return request, errors.New(errors.CodeInvalidParam)
	}
	return request, nil
}

// IntegrationOverview 查询外部集成交互总览。
// GET /api/admin/audit/integrations/overview
func (h *AuditHandler) IntegrationOverview(c *fiber.Ctx) error {
	var request dto.IntegrationOverviewRequest
	if err := c.QueryParser(&request); err != nil {
		return errors.New(errors.CodeInvalidParam)
	}
	filter, err := integrationFilter(request.IntegrationFilterRequest)
	if err != nil {
		return err
	}
	result, err := h.integrationQuery.Overview(c.UserContext(), integrationquery.OverviewFilter{
		ListFilter: filter,
		Bucket:     request.Bucket,
	})
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// ListIntegrations 查询外部集成交互列表。
// GET /api/admin/audit/integrations
func (h *AuditHandler) ListIntegrations(c *fiber.Ctx) error {
	var request dto.IntegrationListRequest
	if err := c.QueryParser(&request); err != nil || invalidAuditPage(request.Page, request.PageSize) {
		return errors.New(errors.CodeInvalidParam)
	}
	filter, err := integrationFilter(request.IntegrationFilterRequest)
	if err != nil {
		return err
	}
	filter.Page, filter.PageSize = request.Page, request.PageSize
	result, err := h.integrationQuery.List(c.UserContext(), filter)
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

// GetIntegration 查询稳定外部集成记录详情。
// GET /api/admin/audit/integrations/:integration_id
func (h *AuditHandler) GetIntegration(c *fiber.Ctx) error {
	result, err := h.integrationQuery.Get(c.UserContext(), c.Params("integration_id"))
	if err != nil {
		return err
	}
	return response.Success(c, result)
}

func integrationFilter(request dto.IntegrationFilterRequest) (integrationquery.ListFilter, error) {
	from, to, err := auditTimeRange(request.CreatedFrom, request.CreatedTo)
	if err != nil {
		return integrationquery.ListFilter{}, errors.New(errors.CodeInvalidParam)
	}
	return integrationquery.ListFilter{
		CreatedFrom: from, CreatedTo: to, IntegrationID: request.IntegrationID,
		Provider: request.Provider, Direction: request.Direction, Operation: request.Operation,
		Result: request.Result, ResultCategory: request.ResultCategory, ExternalID: request.ExternalID,
		ResourceType: request.ResourceType, ResourceID: request.ResourceID, ResourceKey: request.ResourceKey,
		TriggerSource: request.TriggerSource, TriggerScene: request.TriggerScene, TriggerSeries: request.TriggerSeries,
		StateChanged: request.StateChanged, HTTPStatus: request.HTTPStatus, ProviderCode: request.ProviderCode,
		RequestID: request.RequestID, CorrelationID: request.CorrelationID,
	}, nil
}

func auditTimeRange(fromValue, toValue string) (*time.Time, *time.Time, error) {
	from, err := optionalAuditTime(fromValue)
	if err != nil {
		return nil, nil, err
	}
	to, err := optionalAuditTime(toValue)
	if err != nil {
		return nil, nil, err
	}
	if from != nil && to != nil && !from.Before(*to) {
		return nil, nil, errors.New(errors.CodeInvalidParam)
	}
	return from, to, nil
}

func optionalAuditTime(value string) (*time.Time, error) {
	if value == "" {
		return nil, nil
	}
	parsed, err := time.Parse(time.RFC3339, value)
	if err != nil {
		return nil, err
	}
	return &parsed, nil
}

func invalidAuditPage(page, pageSize int) bool {
	return page < 0 || pageSize < 0 || pageSize > 100
}