package tracking

import (
	"text/template"

	"git.sr.ht/~cco/go-scopes/storage"
)

const (
	sql_table = `
{{- $params := .Cont.Storage.Params -}}
{{- $json := or $params.jsonType "json" -}}
create table if not exists {{ .Table }} (
  trackid {{ or $params.idType "integer" }} primary key,
  {{ range .Cont.HeadFields -}}{{ toLower . }} text default '',
  {{ end -}}
  timestamp timestamptz default current_timestamp,
  data {{ $json }}
);

{{- range $i, $cols := .Cont.Indexes }}
create index idx_{{ $.Cont.TableName }}_{{ add1 $i }} on {{ $.Table }} (
  {{- range $j, $c := $cols -}}
    {{- if ne $j 0 }}, {{ end }}{{ toLower $c }}
  {{- end -}}
 );
{{- end }}
create index idx_{{ $.Cont.TableName }}_ts on {{ .Table }} (timestamp);
`

	sql_insert = `
insert into {{ .Table }} (
  {{- range $j, $c := .Scols -}}
    {{- if ne $j 0 }}, {{ end }}{{ toLower $c }}
  {{- end -}})
  values (
  {{- range $j, $c := .Scols -}}
    {{- if ne $j 0 -}}, {{ end }}${{ add1 $j }}
  {{- end -}})
  returning trackid, timestamp`

	sql_update = `
update {{ .Table }} set {{- range $j, $c := .Scols -}}
    {{- if ne $j 0 }},{{ end }} {{ toLower $c }} = ${{ add $j 2 }}{{ end }}
  where trackid = $1`

	sql_select = `
select {{ range $j, $c := .Scols -}}
    {{- if ne $j 0 }}, {{ end }}{{ toLower $c }}{{ end }}
  from {{ .Table }}
  where {{ range $j, $s := .Quspecs -}}
    {{- if ne $j 0 }} and {{ end -}}
	{{- toLower $s.Col }} {{ $s.Op }} ${{ add1 $j }}{{ end }}
  {{ with .Ordspecs -}}
  order by {{ range $j, $s := . -}}
    {{- if ne $j 0 -}}, {{ end }}{{ toLower $s.Col }}
	{{- if $s.Desc }} desc{{ end }}
	{{- end -}}
  {{- end }}
  {{ with .Limit }}limit {{ . }}{{ end }}
`
)

var SqlCreate, SqlInsert, SqlUpdate, SqlSelect *template.Template

func init() {
	SqlCreate = storage.Template("create_table", sql_table)
	SqlInsert = storage.Template("insert_track", sql_insert)
	SqlUpdate = storage.Template("update_track", sql_update)
	SqlSelect = storage.Template("select_track", sql_select)
}