package controllers

import (
	"encoding/json"
	"fmt"
	"io"
	"strconv"
	"strings"
	"time"

	"server/models"
	"server/pkg/jwtutil"

	beego "github.com/beego/beego/v2/server/web"
)

// BackendErpAccountSetController ERP账套管理控制器
type BackendErpAccountSetController struct {
	beego.Controller
}

func (c *BackendErpAccountSetController) asClaims() (*jwtutil.Claims, error) {
	auth := c.Ctx.Request.Header.Get("Authorization")
	if auth == "" {
		return nil, fmt.Errorf("未登录")
	}
	parts := strings.SplitN(auth, " ", 2)
	if len(parts) != 2 || parts[0] != "Bearer" {
		return nil, fmt.Errorf("认证信息格式错误")
	}
	claims, err := jwtutil.ParseToken(parts[1])
	if err != nil {
		return nil, fmt.Errorf("无效的token")
	}
	if claims.UserType != "backend" {
		return nil, fmt.Errorf("无权访问")
	}
	return claims, nil
}

func (c *BackendErpAccountSetController) asJsonErr(httpStatus, bizCode int, msg string) {
	c.Ctx.Output.SetStatus(httpStatus)
	c.Data["json"] = map[string]interface{}{"code": bizCode, "msg": msg}
	_ = c.ServeJSON()
}

func (c *BackendErpAccountSetController) asOk(data interface{}) {
	c.Data["json"] = map[string]interface{}{"code": 200, "msg": "success", "data": data}
	_ = c.ServeJSON()
}

type accountSetFormPayload struct {
	SetCode            string  `json:"set_code"`
	SetName            string  `json:"set_name"`
	CompanyName        string  `json:"company_name"`
	CompanyTaxNo       string  `json:"company_tax_no"`
	StartYear          int     `json:"start_year"`
	StartMonth         int     `json:"start_month"`
	AccountingStandard string  `json:"accounting_standard"`
	Currency           string  `json:"currency"`
	TaxRate            float64 `json:"tax_rate"`
	Status             string  `json:"status"`
	Remark             string  `json:"remark"`
}

// List GET /backend/erp/account-set/list
func (c *BackendErpAccountSetController) List() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	page, _ := c.GetInt("page", 1)
	pageSize, _ := c.GetInt("pageSize", 20)
	keyword := strings.TrimSpace(c.GetString("keyword"))
	status := strings.TrimSpace(c.GetString("status"))

	if page < 1 {
		page = 1
	}
	if pageSize < 1 || pageSize > 100 {
		pageSize = 20
	}

	qs := models.Orm.QueryTable(new(models.ErpAccountSet)).
		Filter("tenant_id", fmt.Sprintf("%d", claims.TenantId)).
		Filter("delete_time__isnull", true)

	if keyword != "" {
		qs = qs.Filter("set_name__contains", keyword)
	}
	if status != "" {
		qs = qs.Filter("status", status)
	}

	total, _ := qs.Count()

	var list []models.ErpAccountSet
	_, err = qs.OrderBy("-id").Limit(pageSize, (page-1)*pageSize).All(&list)
	if err != nil {
		c.asJsonErr(500, 500, "查询失败: "+err.Error())
		return
	}

	c.asOk(map[string]interface{}{
		"list":     list,
		"total":    total,
		"page":     page,
		"pageSize": pageSize,
	})
}

// Detail GET /backend/erp/account-set/:id
func (c *BackendErpAccountSetController) Detail() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.ParseUint(idStr, 10, 64)
	if id == 0 {
		c.asJsonErr(400, 400, "无效的ID")
		return
	}

	var set models.ErpAccountSet
	err = models.Orm.QueryTable(new(models.ErpAccountSet)).
		Filter("id", id).
		Filter("tenant_id", fmt.Sprintf("%d", claims.TenantId)).
		One(&set)
	if err != nil {
		c.asJsonErr(404, 404, "账套未找到")
		return
	}

	c.asOk(set)
}

// Create POST /backend/erp/account-set
func (c *BackendErpAccountSetController) Create() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	raw, err := io.ReadAll(c.Ctx.Request.Body)
	if err != nil {
		c.asJsonErr(400, 400, "参数错误")
		return
	}
	var p accountSetFormPayload
	if err := json.Unmarshal(raw, &p); err != nil {
		c.asJsonErr(400, 400, "参数错误")
		return
	}

	if strings.TrimSpace(p.SetName) == "" {
		c.asJsonErr(400, 400, "账套名称不能为空")
		return
	}
	if strings.TrimSpace(p.SetCode) == "" {
		c.asJsonErr(400, 400, "账套编码不能为空")
		return
	}

	set := models.ErpAccountSet{
		TenantID:           fmt.Sprintf("%d", claims.TenantId),
		SetCode:            strings.TrimSpace(p.SetCode),
		SetName:            strings.TrimSpace(p.SetName),
		CompanyName:        strings.TrimSpace(p.CompanyName),
		CompanyTaxNo:       strings.TrimSpace(p.CompanyTaxNo),
		StartYear:          p.StartYear,
		StartMonth:         p.StartMonth,
		AccountingStandard: p.AccountingStandard,
		Currency:           strings.TrimSpace(p.Currency),
		TaxRate:            p.TaxRate,
		Status:             p.Status,
		Remark:             p.Remark,
		CreateTime:         time.Now(),
		UpdateTime:         time.Now(),
	}

	if set.StartYear == 0 {
		set.StartYear = time.Now().Year()
	}
	if set.StartMonth == 0 {
		set.StartMonth = 1
	}
	if set.AccountingStandard == "" {
		set.AccountingStandard = "1"
	}
	if set.Currency == "" {
		set.Currency = "CNY"
	}
	if set.TaxRate == 0 {
		set.TaxRate = 13.00
	}
	if set.Status == "" {
		set.Status = "1"
	}

	id, err := models.Orm.Insert(&set)
	if err != nil {
		c.asJsonErr(500, 500, "创建失败: "+err.Error())
		return
	}

	c.asOk(map[string]interface{}{"id": id})
}

// Update PUT /backend/erp/account-set/:id
func (c *BackendErpAccountSetController) Update() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.ParseUint(idStr, 10, 64)
	if id == 0 {
		c.asJsonErr(400, 400, "无效的ID")
		return
	}

	raw, err := io.ReadAll(c.Ctx.Request.Body)
	if err != nil {
		c.asJsonErr(400, 400, "参数错误")
		return
	}
	var p accountSetFormPayload
	if err := json.Unmarshal(raw, &p); err != nil {
		c.asJsonErr(400, 400, "参数错误")
		return
	}

	var set models.ErpAccountSet
	err = models.Orm.QueryTable(new(models.ErpAccountSet)).
		Filter("id", id).
		Filter("tenant_id", fmt.Sprintf("%d", claims.TenantId)).
		One(&set)
	if err != nil {
		c.asJsonErr(404, 404, "账套未找到")
		return
	}

	set.SetCode = strings.TrimSpace(p.SetCode)
	set.SetName = strings.TrimSpace(p.SetName)
	set.CompanyName = strings.TrimSpace(p.CompanyName)
	set.CompanyTaxNo = strings.TrimSpace(p.CompanyTaxNo)
	set.StartYear = p.StartYear
	set.StartMonth = p.StartMonth
	set.AccountingStandard = p.AccountingStandard
	set.Currency = strings.TrimSpace(p.Currency)
	set.TaxRate = p.TaxRate
	set.Status = p.Status
	set.Remark = p.Remark
	set.UpdateTime = time.Now()

	_, err = models.Orm.Update(&set)
	if err != nil {
		c.asJsonErr(500, 500, "更新失败: "+err.Error())
		return
	}

	c.asOk(nil)
}

// Delete DELETE /backend/erp/account-set/:id
func (c *BackendErpAccountSetController) Delete() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.ParseUint(idStr, 10, 64)
	if id == 0 {
		c.asJsonErr(400, 400, "无效的ID")
		return
	}

	now := time.Now()
	_, err = models.Orm.QueryTable(new(models.ErpAccountSet)).
		Filter("id", id).
		Filter("tenant_id", fmt.Sprintf("%d", claims.TenantId)).
		Update(map[string]interface{}{
			"delete_time": now,
			"update_time": now,
		})
	if err != nil {
		c.asJsonErr(500, 500, "删除失败: "+err.Error())
		return
	}

	c.asOk(nil)
}

// ToggleStatus POST /backend/erp/account-set/:id/status
func (c *BackendErpAccountSetController) ToggleStatus() {
	claims, err := c.asClaims()
	if err != nil {
		c.asJsonErr(401, 401, err.Error())
		return
	}

	idStr := c.Ctx.Input.Param(":id")
	id, _ := strconv.ParseUint(idStr, 10, 64)
	if id == 0 {
		c.asJsonErr(400, 400, "无效的ID")
		return
	}

	raw, _ := io.ReadAll(c.Ctx.Request.Body)
	var p struct {
		Status string `json:"status"`
	}
	_ = json.Unmarshal(raw, &p)

	_, err = models.Orm.QueryTable(new(models.ErpAccountSet)).
		Filter("id", id).
		Filter("tenant_id", fmt.Sprintf("%d", claims.TenantId)).
		Update(map[string]interface{}{
			"status":      p.Status,
			"update_time": time.Now(),
		})
	if err != nil {
		c.asJsonErr(500, 500, "操作失败: "+err.Error())
		return
	}

	c.asOk(nil)
}