package models

import (
	"errors"
	"time"

	"github.com/grafana/grafana/pkg/setting"
)

var ErrInvalidQuotaTarget = errors.New("invalid quota target")

type Quota struct {
	Id      int64
	OrgId   int64
	UserId  int64
	Target  string
	Limit   int64
	Created time.Time
	Updated time.Time
}

type QuotaScope struct {
	Name         string
	Target       string
	DefaultLimit int64
}

type OrgQuotaDTO struct {
	OrgId  int64  `json:"org_id"`
	Target string `json:"target"`
	Limit  int64  `json:"limit"`
	Used   int64  `json:"used"`
}

type UserQuotaDTO struct {
	UserId int64  `json:"user_id"`
	Target string `json:"target"`
	Limit  int64  `json:"limit"`
	Used   int64  `json:"used"`
}

type GlobalQuotaDTO struct {
	Target string `json:"target"`
	Limit  int64  `json:"limit"`
	Used   int64  `json:"used"`
}

type GetOrgQuotaByTargetQuery struct {
	Target  string
	OrgId   int64
	Default int64
	Result  *OrgQuotaDTO
}

type GetOrgQuotasQuery struct {
	OrgId  int64
	Result []*OrgQuotaDTO
}

type GetUserQuotaByTargetQuery struct {
	Target  string
	UserId  int64
	Default int64
	Result  *UserQuotaDTO
}

type GetUserQuotasQuery struct {
	UserId int64
	Result []*UserQuotaDTO
}

type GetGlobalQuotaByTargetQuery struct {
	Target  string
	Default int64
	Result  *GlobalQuotaDTO
}

type UpdateOrgQuotaCmd struct {
	Target string `json:"target"`
	Limit  int64  `json:"limit"`
	OrgId  int64  `json:"-"`
}

type UpdateUserQuotaCmd struct {
	Target string `json:"target"`
	Limit  int64  `json:"limit"`
	UserId int64  `json:"-"`
}

func GetQuotaScopes(target string) ([]QuotaScope, error) {
	scopes := make([]QuotaScope, 0)
	switch target {
	case "user":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.User},
			QuotaScope{Name: "org", Target: "org_user", DefaultLimit: setting.Quota.Org.User},
		)
		return scopes, nil
	case "org":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.Org},
			QuotaScope{Name: "user", Target: "org_user", DefaultLimit: setting.Quota.User.Org},
		)
		return scopes, nil
	case "dashboard":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.Dashboard},
			QuotaScope{Name: "org", Target: target, DefaultLimit: setting.Quota.Org.Dashboard},
		)
		return scopes, nil
	case "data_source":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.DataSource},
			QuotaScope{Name: "org", Target: target, DefaultLimit: setting.Quota.Org.DataSource},
		)
		return scopes, nil
	case "api_key":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.ApiKey},
			QuotaScope{Name: "org", Target: target, DefaultLimit: setting.Quota.Org.ApiKey},
		)
		return scopes, nil
	case "session":
		scopes = append(scopes,
			QuotaScope{Name: "global", Target: target, DefaultLimit: setting.Quota.Global.Session},
		)
		return scopes, nil
	default:
		return scopes, ErrInvalidQuotaTarget
	}
}