package handler

import (
	"net/http"

	"bj_power_mes/common/httpx"
	"bj_power_mes/internal/logic"
	"bj_power_mes/internal/svc"
)

// ListProcessFlowsHandler GET /process-flows?processCode=
func ListProcessFlowsHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		code := atoiDefault(r.URL.Query().Get("processCode"), 0)
		data, err := logic.New(svcCtx).ListFlows(r.Context(), code)
		if err != nil {
			httpx.Fail(w, 2201, err.Error())
			return
		}
		httpx.Ok(w, data)
	}
}

// SaveProcessFlowHandler POST /process-flows（新建或更新工艺流程，含步骤模板）
func SaveProcessFlowHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var req logic.FlowReq
		if err := httpx.ParseJSON(r, &req); err != nil {
			httpx.BadRequest(w, "请求体解析失败")
			return
		}
		if err := logic.New(svcCtx).SaveFlow(r.Context(), req, operator(r, "")); err != nil {
			httpx.Fail(w, 2202, err.Error())
			return
		}
		httpx.OkMessage(w, "工艺流程已保存", nil)
	}
}

// DeleteProcessFlowHandler DELETE /process-flows/:id
func DeleteProcessFlowHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if err := logic.New(svcCtx).DeleteFlow(r.Context(), pathId(r), operator(r, "")); err != nil {
			httpx.Fail(w, 2203, err.Error())
			return
		}
		httpx.OkMessage(w, "工艺流程已删除", nil)
	}
}

// UploadPdfHandler POST /process-flows/upload（工艺图纸PDF上传，返回文件名）
func UploadPdfHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if err := r.ParseMultipartForm(32 << 20); err != nil {
			httpx.BadRequest(w, "上传文件过大或格式错误")
			return
		}
		name, err := saveUploadFile(r, "file", svcCtx.Config.Upload.Dir)
		if err != nil {
			httpx.Fail(w, 2204, "文件保存失败："+err.Error())
			return
		}
		httpx.Ok(w, map[string]any{"filename": name, "url": "/api/v1/files/" + name})
	}
}

// FileDownloadHandler JWT 保护的文件下载（MES 前端展示 PDF/照片）
func FileDownloadHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		serveUploadFile(w, r, svcCtx.Config.Upload.Dir, r.URL.Query().Get("name"))
	}
}

// ListStationsHandler GET /stations
func ListStationsHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		data, err := logic.New(svcCtx).ListStations(r.Context())
		if err != nil {
			httpx.Fail(w, 2205, err.Error())
			return
		}
		httpx.Ok(w, data)
	}
}

// SaveStationHandler POST /stations（工位绑定工艺流程图）
func SaveStationHandler(svcCtx *svc.ServiceContext) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		var req logic.StationReq
		if err := httpx.ParseJSON(r, &req); err != nil {
			httpx.BadRequest(w, "请求体解析失败")
			return
		}
		if err := logic.New(svcCtx).SaveStation(r.Context(), req, operator(r, "")); err != nil {
			httpx.Fail(w, 2206, err.Error())
			return
		}
		httpx.OkMessage(w, "工位绑定已保存", nil)
	}
}