package api

import (
	"io"
	"net/http"
	"strconv"
	"time"

	"cockpit/internal/domain"
	"cockpit/internal/importer"
	"cockpit/internal/middleware"

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

func (h *Handler) ImportOrdersTemplate(c *gin.Context) {
	b, err := importer.BuildOrdersTemplate()
	if err != nil {
		c.JSON(http.StatusInternalServerError, domain.Fail("生成模板失败："+err.Error()))
		return
	}
	c.Header("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
	c.Header("Content-Disposition", "attachment; filename=\"orders.xlsx\"")
	c.Writer.WriteHeader(http.StatusOK)
	_, _ = c.Writer.Write(b)
}

func (h *Handler) ImportOrdersPreview(c *gin.Context) {
	fh, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("请上传文件（form-data: file）"))
		return
	}
	file, err := fh.Open()
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("文件打开失败"))
		return
	}
	defer func() { _ = file.Close() }()

	total, preview, errs, err := importer.ParseOrdersExcel(c.Request.Context(), h.db, file, 20)
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("解析失败："+err.Error()))
		return
	}
	c.JSON(http.StatusOK, domain.OK(gin.H{
		"totalRows":  total,
		"preview":    preview,
		"errors":     errs,
		"errorCount": len(errs),
	}))
}

func (h *Handler) ImportOrdersCommit(c *gin.Context) {
	uidAny, _ := c.Get(middleware.CtxUserIDKey)
	uid, _ := uidAny.(uint64)

	fh, err := c.FormFile("file")
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("请上传文件（form-data: file）"))
		return
	}
	file, err := fh.Open()
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("文件打开失败"))
		return
	}
	defer func() { _ = file.Close() }()

	job, err := importer.CommitOrdersFromExcel(c.Request.Context(), h.db, file, uid, fh.Filename)
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("导入失败："+err.Error()))
		return
	}
	c.JSON(http.StatusOK, domain.OK(job))
}

func (h *Handler) ImportOrdersJSON(c *gin.Context) {
	uidAny, _ := c.Get(middleware.CtxUserIDKey)
	uid, _ := uidAny.(uint64)

	body, err := io.ReadAll(c.Request.Body)
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("读取请求失败"))
		return
	}
	job, err := importer.CommitOrdersFromJSON(c.Request.Context(), h.db, body, uid)
	if err != nil {
		c.JSON(http.StatusBadRequest, domain.Fail("导入失败："+err.Error()))
		return
	}
	c.JSON(http.StatusOK, domain.OK(job))
}

func (h *Handler) ImportJobs(c *gin.Context) {
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
	if page < 1 {
		page = 1
	}
	if size < 1 || size > 200 {
		size = 20
	}

	q := h.db.Model(&domain.ImportJob{}).Where("type = ?", "orders")
	var total int64
	_ = q.Count(&total).Error
	var list []domain.ImportJob
	_ = q.Order("id DESC").Offset((page - 1) * size).Limit(size).Find(&list).Error

	c.JSON(http.StatusOK, domain.OK(gin.H{
		"list":  list,
		"total": total,
	}))
}

func (h *Handler) ImportJobGet(c *gin.Context) {
	id, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	var job domain.ImportJob
	if err := h.db.Where("id = ?", id).First(&job).Error; err != nil {
		c.JSON(http.StatusNotFound, domain.Fail("不存在"))
		return
	}
	c.JSON(http.StatusOK, domain.OK(job))
}

func (h *Handler) ImportJobErrors(c *gin.Context) {
	jobID, _ := strconv.ParseUint(c.Param("id"), 10, 64)
	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
	if page < 1 {
		page = 1
	}
	if size < 1 || size > 200 {
		size = 20
	}

	q := h.db.Model(&domain.ImportJobError{}).Where("job_id = ?", jobID)
	var total int64
	_ = q.Count(&total).Error
	var list []domain.ImportJobError
	_ = q.Order("id ASC").Offset((page - 1) * size).Limit(size).Find(&list).Error

	c.JSON(http.StatusOK, domain.OK(gin.H{
		"list":  list,
		"total": total,
		"at":    time.Now(),
	}))
}