package servers

import (
	"WiiCITMS/process/hr"
	"context"
	"encoding/json"
	"fmt"
	"time"

	"github.com/mark3labs/mcp-go/mcp"
	"github.com/mark3labs/mcp-go/server"
)

// hr
var HRTools = []server.ServerTool{
	{
		Tool: mcp.NewTool(
			"createOrganization",
			mcp.WithDescription("create an organization, which can be a department, company, business unit, etc"),
			mcp.WithString("name", mcp.Required(), mcp.Description("organization name")),
			mcp.WithString("parentGuid", mcp.Description("parent organization,uuid")),
			mcp.WithNumber("organizationType", mcp.Description("company type as 0,business unit as 1, department type as 2")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			name := request.GetString("name", "")
			if name == "" {
				return nil, fmt.Errorf("name is required")
			}
			parent := request.GetString("parentGuid", "")
			oType := request.GetInt("organizationType", 0)

			rep, proc := hr.CreateOrganization(hr.CreateOrganizationRequest{OrganizationName: name, ParentGuid: parent, OrganizationType: oType})
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	}, {
		Tool: mcp.NewTool(
			"queryOrganizationsWithName",
			mcp.WithDescription("query an organization using its name may return fuzzy matching records, which may have multiple records"),
			mcp.WithString("name", mcp.Required(), mcp.Description("organization name")),
			mcp.WithNumber("limit", mcp.Description("paging parameters")),
			mcp.WithNumber("offset", mcp.Description("paging parameters")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			name := request.GetString("name", "")
			if name == "" {
				return nil, fmt.Errorf("name is required")
			}
			limit := request.GetInt("limit", 20)
			offset := request.GetInt("offset", 1)

			rep, proc := hr.QueryOrganizations(hr.QueryOrganizationsRequest{OrganizationName: name, Limit: limit, Offset: offset})
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	}, {
		Tool: mcp.NewTool(
			"createStaffWithOrganization",
			mcp.WithDescription("create an employee and specify the organization to which they belong"),
			mcp.WithString("staffName", mcp.Required(), mcp.Description("staff name")),
			mcp.WithString("affiliated", mcp.Required(), mcp.Description("organization guid")),
			mcp.WithNumber("staffType", mcp.Description("staff type,as the default type, the formal type has a value of 0. the internship type has a value of 1")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			staffName := request.GetString("staffName", "")
			if staffName == "" {
				return nil, fmt.Errorf("staffName is required")
			}
			affiliated := request.GetString("affiliated", "")
			if affiliated == "" {
				return nil, fmt.Errorf("affiliated is required")
			}
			staffType := request.GetInt("staffType", 0)

			rep, proc := hr.CreateStaffWithOrganization(hr.CreateStaffWithOrganizationRequest{
				StaffName:      staffName,
				Affiliated:     affiliated,
				StaffType:      staffType,
				AffiliatedType: 0,
			})
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	},
	// 创建请假申请
	{
		Tool: mcp.NewTool(
			"createLeave",
			mcp.WithDescription("创建请假申请"),
			mcp.WithString("staffGuid", mcp.Required(), mcp.Description("员工ID")),
			mcp.WithNumber("leaveType", mcp.Required(), mcp.Description("请假类型: 1-事假, 2-病假, 3-年假, 4-调休")),
			mcp.WithString("startTime", mcp.Required(), mcp.Description("请假开始时间，格式：2006-01-02 15:04:05")),
			mcp.WithString("endTime", mcp.Required(), mcp.Description("请假结束时间，格式：2006-01-02 15:04:05")),
			mcp.WithNumber("duration", mcp.Required(), mcp.Description("请假时长(天)")),
			mcp.WithString("reason", mcp.Required(), mcp.Description("请假原因")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			// 获取参数
			staffGuid := request.GetString("staffGuid", "")
			if staffGuid == "" {
				return nil, fmt.Errorf("员工ID不能为空")
			}
			leaveType := request.GetInt("leaveType", 0)
			if leaveType <= 0 || leaveType > 4 {
				return nil, fmt.Errorf("无效的请假类型")
			}
			
			// 解析时间
			startTimeStr := request.GetString("startTime", "")
			if startTimeStr == "" {
				return nil, fmt.Errorf("开始时间不能为空")
			}
			startTime, err := time.Parse("2006-01-02 15:04:05", startTimeStr)
			if err != nil {
				return nil, fmt.Errorf("开始时间格式错误: %v", err)
			}
			
			endTimeStr := request.GetString("endTime", "")
			if endTimeStr == "" {
				return nil, fmt.Errorf("结束时间不能为空")
			}
			endTime, err := time.Parse("2006-01-02 15:04:05", endTimeStr)
			if err != nil {
				return nil, fmt.Errorf("结束时间格式错误: %v", err)
			}
			
			// 验证时间
			if endTime.Before(startTime) {
				return nil, fmt.Errorf("结束时间不能早于开始时间")
			}
			
			duration := request.GetFloat("duration", 0)
			if duration <= 0 {
				return nil, fmt.Errorf("请假时长必须大于0")
			}
			
			reason := request.GetString("reason", "")
			if reason == "" {
				return nil, fmt.Errorf("请假原因不能为空")
			}
			
			// 获取操作者ID，默认为请假员工自己
			operatorGuid := request.GetString("operatorGuid", staffGuid)

			// 创建请假记录
			rep, proc := hr.CreateLeave(hr.CreateLeaveRequest{
				StaffGuid:    staffGuid,
				LeaveType:    int(leaveType),
				StartTime:    startTime,
				EndTime:      endTime,
				Duration:     float32(duration),
				Reason:       reason,
			}, operatorGuid)
			
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	},
	// 创建请假并启动审批流程
	{
		Tool: mcp.NewTool(
			"createLeaveWithWorkflow",
			mcp.WithDescription("创建请假申请并启动审批流程"),
			mcp.WithString("staffGuid", mcp.Required(), mcp.Description("请假员工ID")),
			mcp.WithNumber("leaveType", mcp.Required(), mcp.Description("请假类型: 1-事假, 2-病假, 3-年假, 4-调休")),
			mcp.WithString("startTime", mcp.Required(), mcp.Description("请假开始时间，格式：2006-01-02 15:04:05")),
			mcp.WithString("endTime", mcp.Required(), mcp.Description("请假结束时间，格式：2006-01-02 15:04:05")),
			mcp.WithNumber("duration", mcp.Required(), mcp.Description("请假时长(天)")),
			mcp.WithString("reason", mcp.Required(), mcp.Description("请假原因")),
			mcp.WithString("initiatorGuid", mcp.Required(), mcp.Description("发起人用户ID，可与请假员工ID相同")),
			mcp.WithArray("approverGuids", mcp.Required(), mcp.Description("审批人用户ID列表，按审批顺序排列")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			// 获取基本参数
			staffGuid := request.GetString("staffGuid", "")
			if staffGuid == "" {
				return nil, fmt.Errorf("员工ID不能为空")
			}
			leaveType := request.GetInt("leaveType", 0)
			if leaveType <= 0 || leaveType > 4 {
				return nil, fmt.Errorf("无效的请假类型")
			}
			
			// 解析时间
			startTimeStr := request.GetString("startTime", "")
			if startTimeStr == "" {
				return nil, fmt.Errorf("开始时间不能为空")
			}
			startTime, err := time.Parse("2006-01-02 15:04:05", startTimeStr)
			if err != nil {
				return nil, fmt.Errorf("开始时间格式错误: %v", err)
			}
			
			endTimeStr := request.GetString("endTime", "")
			if endTimeStr == "" {
				return nil, fmt.Errorf("结束时间不能为空")
			}
			endTime, err := time.Parse("2006-01-02 15:04:05", endTimeStr)
			if err != nil {
				return nil, fmt.Errorf("结束时间格式错误: %v", err)
			}
			
			// 验证时间
			if endTime.Before(startTime) {
				return nil, fmt.Errorf("结束时间不能早于开始时间")
			}
			
			duration := request.GetFloat("duration", 0)
			if duration <= 0 {
				return nil, fmt.Errorf("请假时长必须大于0")
			}
			
			reason := request.GetString("reason", "")
			if reason == "" {
				return nil, fmt.Errorf("请假原因不能为空")
			}
			
			// 获取工作流参数
			initiatorGuid := request.GetString("initiatorGuid", "")
			if initiatorGuid == "" {
				return nil, fmt.Errorf("发起人用户ID不能为空")
			}
			
			// 获取审批人列表
			approverGuidsStr := request.GetString("approverGuids", "[]")
			if approverGuidsStr == "[]" {
				return nil, fmt.Errorf("审批人列表不能为空")
			}
			
			// 解析JSON格式的审批人列表
			var approverGuidsArray []string
			if err := json.Unmarshal([]byte(approverGuidsStr), &approverGuidsArray); err != nil {
				return nil, fmt.Errorf("审批人列表格式错误: %v", err)
			}
			
			if len(approverGuidsArray) == 0 {
				return nil, fmt.Errorf("审批人列表不能为空")
			}
			
			approverGuids := approverGuidsArray
			
			// 创建请假参数
			createLeaveRequest := hr.CreateLeaveRequest{
				StaffGuid: staffGuid,
				LeaveType: leaveType,
				StartTime: startTime,
				EndTime:   endTime,
				Duration:  float32(duration),
				Reason:    reason,
			}
			
			// 创建请假并启动审批流程
			rep, proc := hr.CreateLeaveWithWorkflow(createLeaveRequest, initiatorGuid, approverGuids)
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	},
	// 查询请假记录及审批状态
	{
		Tool: mcp.NewTool(
			"queryLeaveWithWorkflow",
			mcp.WithDescription("查询请假记录及审批状态"),
			mcp.WithString("leaveGuid", mcp.Required(), mcp.Description("请假记录ID")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			leaveGuid := request.GetString("leaveGuid", "")
			if leaveGuid == "" {
				return nil, fmt.Errorf("请假记录ID不能为空")
			}
			
			leave, workflowStatus, proc := hr.QueryLeaveWithWorkflowStatus(leaveGuid)
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			
			// 构建响应结果
			result := map[string]interface{}{
				"leave": leave,
			}
			
			if workflowStatus != nil {
				result["workflow"] = workflowStatus
			}
			
			repStr, err := json.Marshal(result)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	},
	// 查询请假记录
	{
		Tool: mcp.NewTool(
			"queryLeaves",
			mcp.WithDescription("查询请假记录"),
			mcp.WithString("staffGuid", mcp.Description("员工ID，可选")),
			mcp.WithNumber("limit", mcp.Description("分页参数，每页数量")),
			mcp.WithNumber("offset", mcp.Description("分页参数，偏移量")),
		),
		Handler: func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			// 获取参数
			staffGuid := request.GetString("staffGuid", "")
			limit := request.GetInt("limit", 20)    // 默认每页20条
			offset := request.GetInt("offset", 0)   // 默认从第0条开始
			
			// 查询请假记录
			rep, proc := hr.QueryLeaves(hr.QueryLeavesRequest{
				StaffGuid: staffGuid,
				Limit:     limit,
				Offset:    offset,
			})
			
			if proc.IsError() {
				return mcp.NewToolResultText(""), proc.Error
			}
			
			repStr, err := json.Marshal(rep)
			if err != nil {
				return mcp.NewToolResultText(""), err
			}
			return mcp.NewToolResultText(string(repStr)), nil
		},
	},
}