package api

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/tcs-iptv/tcs/internal/catalog"
	"github.com/tcs-iptv/tcs/internal/httpx"
)

// CatalogHandler 目录库独立微服务 API 处理器。
// 提供四维度标识查询接口，可作为独立服务部署。
type CatalogHandler struct {
	cat *catalog.Catalog
}

// NewCatalogHandler 创建目录库 API 处理器。
func NewCatalogHandler(cat *catalog.Catalog) *CatalogHandler {
	return &CatalogHandler{cat: cat}
}

// Register 注册目录库查询路由。
func (h *CatalogHandler) Register(rg *gin.RouterGroup) {
	rg.GET("/catalog/query-by-ma", h.queryByMA)
	rg.GET("/catalog/query-by-hash", h.queryByHash)
	rg.GET("/catalog/query-by-provincial-code", h.queryByProvincialCode)
	rg.GET("/catalog/query-by-library-id", h.queryByLibraryID)
	rg.GET("/catalog/query-all", h.queryAll)
}

func (h *CatalogHandler) queryByMA(c *gin.Context) {
	maCode := c.Query("ma_code")
	if maCode == "" {
		httpx.Error(c, http.StatusBadRequest, "INVALID_REQUEST", "缺少 ma_code 参数")
		return
	}
	result, err := h.cat.QueryByMA(maCode)
	if err != nil {
		httpx.Error(c, http.StatusNotFound, "NOT_FOUND", err.Error())
		return
	}
	httpx.OK(c, result)
}

func (h *CatalogHandler) queryByHash(c *gin.Context) {
	fileHash := c.Query("file_hash")
	if fileHash == "" {
		httpx.Error(c, http.StatusBadRequest, "INVALID_REQUEST", "缺少 file_hash 参数")
		return
	}
	result, err := h.cat.QueryByHash(fileHash)
	if err != nil {
		httpx.Error(c, http.StatusNotFound, "NOT_FOUND", err.Error())
		return
	}
	httpx.OK(c, result)
}

func (h *CatalogHandler) queryByProvincialCode(c *gin.Context) {
	code := c.Query("provincial_code")
	if code == "" {
		httpx.Error(c, http.StatusBadRequest, "INVALID_REQUEST", "缺少 provincial_code 参数")
		return
	}
	result, err := h.cat.QueryByProvincialCode(code)
	if err != nil {
		httpx.Error(c, http.StatusNotFound, "NOT_FOUND", err.Error())
		return
	}
	httpx.OK(c, result)
}

func (h *CatalogHandler) queryByLibraryID(c *gin.Context) {
	libraryID := c.Query("library_id")
	if libraryID == "" {
		httpx.Error(c, http.StatusBadRequest, "INVALID_REQUEST", "缺少 library_id 参数")
		return
	}
	result, err := h.cat.QueryByLibraryFileID(libraryID)
	if err != nil {
		httpx.Error(c, http.StatusNotFound, "NOT_FOUND", err.Error())
		return
	}
	httpx.OK(c, result)
}

func (h *CatalogHandler) queryAll(c *gin.Context) {
	maCode := c.Query("ma_code")
	if maCode == "" {
		httpx.Error(c, http.StatusBadRequest, "INVALID_REQUEST", "缺少 ma_code 参数")
		return
	}
	result, err := h.cat.QueryAll(maCode)
	if err != nil {
		httpx.Error(c, http.StatusNotFound, "NOT_FOUND", err.Error())
		return
	}
	httpx.OK(c, result)
}