package api

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"log"
	"net/http"

	"git.x2erp.com/qdy/go-base/ctx"
	"git.x2erp.com/qdy/go-base/model/response"
	opencode "git.x2erp.com/qdy/go-base/sdk/opencode"
	"git.x2erp.com/qdy/go-svc-code/internal/opencode/container"
)

// CreateSessionHandler 创建OpenCode会话
// 路由: POST /api/opencode/projects/:id/sessions
func CreateSessionHandler(manager *container.InstanceManager) func(string, map[string]interface{}, *ctx.RequestContext) (*response.QueryResult[interface{}], error) {
	return func(id string, req map[string]interface{}, reqCtx *ctx.RequestContext) (*response.QueryResult[interface{}], error) {
		log.Printf("创建OpenCode会话请求: 项目ID=%s, 请求参数=%v", id, req)

		// 获取实例
		instance := manager.GetInstance(id)
		if instance == nil {
			return ErrorResponse(fmt.Errorf("项目 %s 的OpenCode实例未启动", id))
		}

		if instance.Status != container.StatusRunning {
			return ErrorResponse(fmt.Errorf("项目 %s 的OpenCode实例不在运行状态", id))
		}

		// 创建OpenCode客户端
		serverURL := fmt.Sprintf("http://localhost:%d", instance.Port)
		client, err := opencode.NewClient(serverURL)
		if err != nil {
			return ErrorResponse(fmt.Errorf("创建OpenCode客户端失败: %v", err))
		}

		// 准备请求体
		var parentID *string
		if pid, ok := req["parent_id"].(string); ok && pid != "" {
			parentID = &pid
		}

		var title *string
		if t, ok := req["title"].(string); ok && t != "" {
			title = &t
		}

		// 创建认证请求编辑器
		var requestEditors []opencode.RequestEditorFn
		if instance.Token != "" {
			requestEditors = append(requestEditors, func(ctx context.Context, req *http.Request) error {
				req.Header.Set("Authorization", "Bearer "+instance.Token)
				return nil
			})
		}

		// 调用OpenCode API创建会话
		resp, err := client.SessionCreate(
			context.Background(),
			&opencode.SessionCreateParams{},
			opencode.SessionCreateJSONRequestBody{
				ParentID: parentID,
				Title:    title,
			},
			requestEditors...,
		)
		if err != nil {
			return ErrorResponse(fmt.Errorf("请求OpenCode API失败: %v", err))
		}
		defer resp.Body.Close()

		// 读取响应
		body, err := io.ReadAll(resp.Body)
		if err != nil {
			return ErrorResponse(fmt.Errorf("读取响应失败: %v", err))
		}

		// 检查HTTP状态码
		if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusCreated {
			return ErrorResponse(fmt.Errorf("OpenCode API返回错误: 状态码=%d, 响应=%s", resp.StatusCode, string(body)))
		}

		// 解析响应
		var opencodeResponse map[string]interface{}
		if err := json.Unmarshal(body, &opencodeResponse); err != nil {
			return ErrorResponse(fmt.Errorf("解析OpenCode响应失败: %v", err))
		}

		log.Printf("OpenCode会话创建成功: 项目=%s, 响应=%v", id, opencodeResponse)
		return SuccessResponseWithMessage(opencodeResponse, "会话创建成功")
	}
}