package controllers

import (
	"errors"
	"strings"

	"github.com/beego/beego/v2/client/orm"
	"github.com/beego/i18n"
	"github.com/mindoc-org/mindoc/conf"
	"github.com/mindoc-org/mindoc/models"
)

type TemplateController struct {
	BaseController
	BookId int
}

func (c *TemplateController) isPermission() error {
	c.Prepare()

	bookIdentify := c.GetString("identify", "")

	if bookIdentify == "" {
		return errors.New(i18n.Tr(c.Lang, "message.param_error"))
	}

	if !c.Member.IsAdministrator() {
		book, err := models.NewBookResult().FindByIdentify(bookIdentify, c.Member.MemberId)
		if err != nil {
			if err == orm.ErrNoRows {
				return errors.New("项目不存在或没有权限")
			}
			return errors.New("查询项目模板失败")
		}
		c.BookId = book.BookId
	} else {
		book, err := models.NewBook().FindByIdentify(bookIdentify, "book_id")
		if err != nil {
			if err == orm.ErrNoRows {
				return errors.New("项目不存在或没有权限")
			}
			return errors.New("查询项目模板失败")
		}
		c.BookId = book.BookId
	}
	return nil
}

//获取指定模板信息
func (c *TemplateController) Get() {
	if err := c.isPermission(); err != nil {
		c.JsonResult(500, err.Error())
	}
	templateId, _ := c.GetInt("template_id", 0)

	template, err := models.NewTemplate().Find(templateId)

	if err != nil {
		c.JsonResult(500, "读取模板失败")
	}
	if template.IsGlobal == 0 && template.BookId != c.BookId {
		c.JsonResult(404, "模板不存在或已删除")
	}
	c.JsonResult(0, "OK", template)
}

//获取模板列表
func (c *TemplateController) List() {
	c.TplName = "template/list.tpl"
	if err := c.isPermission(); err != nil {
		c.Data["ErrorMessage"] = err.Error()
		return
	}

	templateList, err := models.NewTemplate().FindAllByBookId(c.BookId)

	if err != nil && err != orm.ErrNoRows {
		c.Data["ErrorMessage"] = "查询项目模板失败"
	}
	if templateList != nil {
		for i, t := range templateList {
			templateList[i] = t.Preload()
		}
	}
	//c.JsonResult(0,"OK",templateList)
	c.Data["List"] = templateList
}

//添加模板
func (c *TemplateController) Add() {
	if err := c.isPermission(); err != nil {
		c.JsonResult(500, err.Error())
	}

	templateId, _ := c.GetInt("template_id", 0)
	content := c.GetString("content")
	isGlobal, _ := c.GetInt("is_global", 0)
	templateName := c.GetString("template_name", "")

	if templateName == "" || strings.Count(templateName, "") > 300 {
		c.JsonResult(500, "模板名称不能为空且必须小于300字")
	}
	template := models.NewTemplate()

	if templateId > 0 {
		t, err := template.Find(templateId)
		if err != nil {
			c.JsonResult(500, "模板不存在")
		}

		template = t
		template.ModifyAt = c.Member.MemberId
	}

	template.TemplateId = templateId
	template.BookId = c.BookId
	template.TemplateContent = content
	template.TemplateName = templateName

	//只有管理员才能设置全局模板
	if c.Member.IsAdministrator() {
		template.IsGlobal = isGlobal
	} else {
		template.IsGlobal = 0
		//如果不是管理员需要判断是否有项目权限
		rel, err := models.NewRelationship().FindByBookIdAndMemberId(c.BookId, c.Member.MemberId)
		if err != nil || rel.RoleId == conf.BookObserver {
			c.JsonResult(403, "没有权限")
		}
		//如果修改的模板不是本人创建的，并且又不是项目创建者则禁止修改
		if template.MemberId > 0 && template.MemberId != c.Member.MemberId && rel.RoleId != conf.BookFounder {
			c.JsonResult(403, "没有权限")
		}
	}
	template.MemberId = c.Member.MemberId

	var cols []string

	if templateId > 0 {
		cols = []string{"template_content", "modify_time", "modify_at", "version"}
	}

	if err := template.Save(cols...); err != nil {
		c.JsonResult(500, "报错模板失败")
	}
	c.JsonResult(0, "OK", template)
}

//删除模板
func (c *TemplateController) Delete() {
	if err := c.isPermission(); err != nil {
		c.JsonResult(500, err.Error())
	}
	templateId, _ := c.GetInt("template_id", 0)

	template, err := models.NewTemplate().Find(templateId)

	if err != nil {
		c.JsonResult(404, "模板不存在")
	}

	if c.Member.IsAdministrator() {
		err := models.NewTemplate().Delete(templateId, 0)
		if err != nil {
			c.JsonResult(500, "删除失败")
		}
	} else {
		//如果不是管理员需要判断是否有项目权限
		rel, err := models.NewRelationship().FindByBookIdAndMemberId(template.BookId, c.Member.MemberId)
		if err != nil || rel.RoleId == conf.BookObserver {
			c.JsonResult(403, "没有权限")
		}

		//如果是创始人或管理者可以直接删除模板
		if rel.RoleId == conf.BookFounder || rel.RoleId == conf.BookAdmin {
			err := models.NewTemplate().Delete(templateId, 0)
			if err != nil {
				c.JsonResult(500, "删除失败")
			}
		}

		if err := models.NewTemplate().Delete(templateId, c.Member.MemberId); err != nil {
			c.JsonResult(500, "删除失败")
		}
	}
	c.JsonResult(0, "OK")
}