package tools

import (
	"context"
	"encoding/json"
	"fmt"
)

// AIOpsContextProvider 是 Agent CLI 调用平台上下文的最小接口，具体查库实现在 pkg/aiopscontext。 // Logan.Li
type AIOpsContextProvider interface {
	SearchAssets(ctx context.Context, keyword string, limit int) (interface{}, error)
	ListAlerts(ctx context.Context, target, severity, status, timeRange string, limit int) (interface{}, error)
	MetricSummary(ctx context.Context, target, metric, timeRange string, limit int) (interface{}, error)
}

// NewAIOpsAssetSearchTool 创建资产搜索工具。 // Logan.Li
func NewAIOpsAssetSearchTool(provider AIOpsContextProvider) Tool {
	return &aiopsAssetSearchTool{provider: provider}
}

// NewAIOpsAlertListTool 创建告警查询工具。 // Logan.Li
func NewAIOpsAlertListTool(provider AIOpsContextProvider) Tool {
	return &aiopsAlertListTool{provider: provider}
}

// NewAIOpsMetricSummaryTool 创建指标摘要工具。 // Logan.Li
func NewAIOpsMetricSummaryTool(provider AIOpsContextProvider) Tool {
	return &aiopsMetricSummaryTool{provider: provider}
}

type aiopsAssetSearchTool struct {
	provider AIOpsContextProvider
}

func (t *aiopsAssetSearchTool) Name() string { return "aiops_asset_search" }

func (t *aiopsAssetSearchTool) Description() string {
	return "搜索 AIOps 平台 CMDB/资产库中的服务器资产，返回脱敏后的主机名、IP、协议、系统、状态、Agent 状态和资源使用率。排障前应先用它确认目标对象。"
}

func (t *aiopsAssetSearchTool) Parameters() map[string]interface{} {
	return map[string]interface{}{
		"type": "object",
		"properties": map[string]interface{}{
			"keyword": map[string]interface{}{"type": "string", "description": "主机名、IP、标签或描述关键字，可为空"},
			"limit":   map[string]interface{}{"type": "integer", "description": "返回数量，默认 10，最大 50"},
		},
	}
}

func (t *aiopsAssetSearchTool) RiskLevel() RiskLevel { return RiskSafe }

func (t *aiopsAssetSearchTool) Execute(ctx context.Context, args map[string]interface{}) (*Result, error) {
	data, err := t.provider.SearchAssets(ctx, StringParam(args, "keyword"), IntParam(args, "limit"))
	return jsonResult(data, err)
}

type aiopsAlertListTool struct {
	provider AIOpsContextProvider
}

func (t *aiopsAlertListTool) Name() string { return "aiops_alert_list" }

func (t *aiopsAlertListTool) Description() string {
	return "查询 AIOps 平台近期告警，合并平台告警和 Agent 告警。可按目标、级别、状态、时间范围过滤，用于判断故障是否与近期告警相关。"
}

func (t *aiopsAlertListTool) Parameters() map[string]interface{} {
	return map[string]interface{}{
		"type": "object",
		"properties": map[string]interface{}{
			"target":     map[string]interface{}{"type": "string", "description": "主机名、IP、目标名称，可为空"},
			"severity":   map[string]interface{}{"type": "string", "description": "critical/warning/info，可为空"},
			"status":     map[string]interface{}{"type": "string", "description": "firing/resolved/active，可为空"},
			"time_range": map[string]interface{}{"type": "string", "description": "15m/30m/1h/2h/6h/24h/7d，默认 24h"},
			"limit":      map[string]interface{}{"type": "integer", "description": "返回数量，默认 20，最大 100"},
		},
	}
}

func (t *aiopsAlertListTool) RiskLevel() RiskLevel { return RiskSafe }

func (t *aiopsAlertListTool) Execute(ctx context.Context, args map[string]interface{}) (*Result, error) {
	data, err := t.provider.ListAlerts(ctx,
		StringParam(args, "target"), StringParam(args, "severity"),
		StringParam(args, "status"), StringParam(args, "time_range"),
		IntParam(args, "limit"))
	return jsonResult(data, err)
}

type aiopsMetricSummaryTool struct {
	provider AIOpsContextProvider
}

func (t *aiopsMetricSummaryTool) Name() string { return "aiops_metric_summary" }

func (t *aiopsMetricSummaryTool) Description() string {
	return "查询主机 Agent 指标摘要，返回 latest/min/max/avg/p95/trend 和少量采样点。适合验证 CPU、内存、load 等告警是否真实持续。"
}

func (t *aiopsMetricSummaryTool) Parameters() map[string]interface{} {
	return map[string]interface{}{
		"type": "object",
		"properties": map[string]interface{}{
			"target":     map[string]interface{}{"type": "string", "description": "主机名或 IP，必填"},
			"metric":     map[string]interface{}{"type": "string", "description": "cpu_usage/mem_usage/load1/load5/load15/cpu_iowait，默认 cpu_usage"},
			"time_range": map[string]interface{}{"type": "string", "description": "15m/30m/1h/2h/6h/24h/7d，默认 1h"},
			"limit":      map[string]interface{}{"type": "integer", "description": "最多读取多少个样本，默认 240"},
		},
		"required": []string{"target"},
	}
}

func (t *aiopsMetricSummaryTool) RiskLevel() RiskLevel { return RiskSafe }

func (t *aiopsMetricSummaryTool) Execute(ctx context.Context, args map[string]interface{}) (*Result, error) {
	if StringParam(args, "target") == "" {
		return &Result{Success: false, Error: "target 不能为空", Output: ""}, nil
	}
	data, err := t.provider.MetricSummary(ctx,
		StringParam(args, "target"), StringParam(args, "metric"),
		StringParam(args, "time_range"), IntParam(args, "limit"))
	return jsonResult(data, err)
}

func jsonResult(data interface{}, err error) (*Result, error) {
	if err != nil {
		return &Result{Success: false, Error: err.Error(), Output: err.Error()}, nil
	}
	b, err := json.MarshalIndent(data, "", "  ")
	if err != nil {
		return nil, fmt.Errorf("JSON 序列化失败: %w", err)
	}
	return &Result{Success: true, Output: string(b)}, nil
}