package calendar

import (
	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
	"kumoly.io/kumoly/app/auth"
	"kumoly.io/kumoly/app/errors"
	"kumoly.io/kumoly/app/history"
	"kumoly.io/kumoly/app/server"
)

func ApiEventQuery(c *gin.Context) {
	id := c.Query("id")
	if id != "" {
		e := &Event{}
		err := HasEventAccess(c, e, id)
		if err != nil {
			panic(err)
		}
		server.OK(c, e)
	} else {
		grp := c.Query("grp")
		events := []Event{}
		cl, err := auth.GetContextClaims(c)
		if err != nil {
			panic(err)
		}
		var result *gorm.DB

		if grp != "" {
			if !auth.ACHas(c, auth.ADMIN, auth.SYSTEM, grp) {
				panic(errors.ErrorForbidden)
			}
			result = db.Find(&events, `event_group_id in (
				select id from event_groups where group_id = (
					select id from groups where name = ?
				)
			)`, grp)
		} else if !auth.ACHas(c, auth.ADMIN, auth.SYSTEM) {
			result = db.Find(&events, `event_group_id in (
				select eg.id from event_groups eg where eg.group_id in (
					select g.id from groups g where g.name in ?
				)
			)`, cl.Groups)

		} else {
			result = db.Find(&events)
		}

		if result.Error != nil {
			panic(result.Error)
		}
		server.OK(c, events)
	}
}

func ApiEventNew(c *gin.Context) {
	e := &Event{}
	if err := c.ShouldBindJSON(e); err != nil {
		panic(err)
	}
	if e.ID != "" {
		panic(errors.ErrorBadRequest)
	}
	if e.Start.IsZero() || e.End.IsZero() || e.End.Before(e.Start) {
		panic(ErrorInvalidTime)
	}
	cal := 0
	if db.Raw("select count(id) from calendars where id = ?", e.CalendarID).
		Scan(&cal); cal != 1 {
		panic(errors.ErrorNotFound)
	}
	if !auth.ACHas(c, auth.ADMIN, auth.SYSTEM, e.EventGroup.GroupName) {
		panic(errors.ErrorForbidden)
	}
	if e.EventGroup.Name == "" {
		e.EventGroup.Name = e.Name
	}
	if err := db.Transaction(func(tx *gorm.DB) error {
		if err := tx.Create(e).Error; err != nil {
			return err
		}
		return nil
	}); err != nil {
		panic(err)
	}
	history.Send(history.Info().
		Nm("Create").
		Grp(e.EventGroup.GroupName).Bd(e).
		Iss(c.GetString(auth.GinUserKey)).
		Msg("Event created"))
	server.OK(c, e)
}

func ApiEventUpdate(c *gin.Context) {
	e := &Event{}
	if err := c.ShouldBindJSON(e); err != nil {
		panic(err)
	}
	if e.ID == "" {
		panic(errors.ErrorBadRequest)
	}
	if err := HasEventAccess(c, &Event{}, e.ID); err != nil {
		panic(errors.ErrorForbidden)
	}
	if err := db.Save(e).Error; err != nil {
		panic(err)
	}
	history.Send(history.Info().
		Nm("Update").
		Grp(e.EventGroup.GroupName).Bd(e).
		Iss(c.GetString(auth.GinUserKey)).
		Msg("Event Updated"))
	server.OK(c, e)
}

func ApiEventDelete(c *gin.Context) {
	id := c.Query("id")
	if id == "" {
		panic(errors.ErrorBadRequest)
	}
	e := &Event{}
	err := HasEventAccess(c, e, id)
	if err != nil {
		panic(err)
	}

	err = db.Delete(e, "id = ?", id).Error
	if err != nil {
		panic(errors.NewError(404, err))
	}
	db.Exec(`delete from event_groups where id = ? 
	and 0 = (select count(id) from events where event_group_id = ?)`,
		e.EventGroupID, e.EventGroupID)
	history.Send(history.Info().
		Nm("Delete").
		Grp(e.EventGroup.GroupName).Bd(e).
		Iss(c.GetString(auth.GinUserKey)).
		Msg("Event Deleted"))
	server.OK(c, "ok")
}