package endpoints

import (
	"file-system/internal/api/handlers"
	"file-system/internal/api/requests"
	"file-system/internal/api/validators"
	"file-system/internal/common"
	"file-system/internal/infrastructure/mediator"
	"net/http"

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

type BucketEndpoint struct {
	Mediator              *mediator.Mediator
	CreateBucketValidator *validators.CreateBucketValidator
}

func NewBucketEndpoint(m *mediator.Mediator, cbv *validators.CreateBucketValidator) *BucketEndpoint {
	return &BucketEndpoint{
		Mediator:              m,
		CreateBucketValidator: cbv,
	}
}

// CreateBucket godoc
// @Summary      创建存储桶
// @Description  创建一个新的 S3 存储桶
// @Tags         存储桶管理
// @Accept       json
// @Produce      json
// @Param        request body requests.CreateBucketRequest true "创建存储桶请求参数"
// @Success      200  {object}  map[string]string "创建成功消息"
// @Failure      400  {object}  map[string]string "参数错误"
// @Failure      500  {object}  map[string]string "服务器内部错误"
// @Router       /buckets [post]
func (e *BucketEndpoint) CreateBucket(c *gin.Context) {
	var req requests.CreateBucketRequest
	if err := c.ShouldBind(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	if err := e.CreateBucketValidator.Validate(&req); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	cmd := handlers.CreateBucketCommand{BucketName: req.BucketName}

	result, err := mediator.Send[handlers.CreateBucketCommand, string](e.Mediator, c.Request.Context(), cmd)
	if err != nil {
		if be, ok := err.(*common.BusinessException); ok {
			c.JSON(be.Code, gin.H{"error": be.Message})
		} else {
			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		}
		return
	}

	c.JSON(http.StatusOK, gin.H{"message": result})
}

// ListBuckets godoc
// @Summary      获取存储桶列表
// @Description  列出所有可用的 S3 存储桶
// @Tags         存储桶管理
// @Accept       json
// @Produce      json
// @Success      200  {object}  map[string][]string "存储桶列表"
// @Failure      500  {object}  map[string]string "服务器内部错误"
// @Router       /buckets [get]
func (e *BucketEndpoint) ListBuckets(c *gin.Context) {
	query := handlers.ListBucketsQuery{}
	result, err := mediator.Send[handlers.ListBucketsQuery, []string](e.Mediator, c.Request.Context(), query)
	if err != nil {
		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
		return
	}
	c.JSON(http.StatusOK, gin.H{"buckets": result})
}