package themis

import (
	"context"
	"database/sql"
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestFormatRows(t *testing.T) {
	db, err := sql.Open("sqlite3", fmt.Sprintf(TEST_CONN_STRING_PATTERN, "format-rows"))
	require.NoError(t, err)
	store, err := NewStore(db)
	assert.NoError(t, err)

	rows, err := store.db.Query("SELECT provinces.name, provinces.region, provinces.area, provinces.trade_node FROM provinces WHERE area = 'Gascony'")
	assert.NoError(t, err)

	fmtd, err := FormatRows(context.Background(), rows)
	assert.NoError(t, err)
	assert.Equal(t, `| name     | region | area    | trade_node |
| -------- | ------ | ------- | ---------- |
| Labourd  | France | Gascony | Bordeaux   |
| Armagnac | France | Gascony | Bordeaux   |
| Béarn    | France | Gascony | Bordeaux   |
| Foix     | France | Gascony | Bordeaux   |
`, fmtd)
}

func TestFormatRowsAggregated(t *testing.T) {
	db, err := sql.Open("sqlite3", fmt.Sprintf(TEST_CONN_STRING_PATTERN, "format-rows"))
	require.NoError(t, err)
	store, err := NewStore(db)
	assert.NoError(t, err)

	rows, err := store.db.Query("SELECT count(1) as total, trade_node from provinces where region = 'France' group by trade_node")
	assert.NoError(t, err)

	fmtd, err := FormatRows(context.Background(), rows)
	assert.NoError(t, err)
	assert.Equal(t, `| total | trade_node      |
| ----- | --------------- |
| 25    | Bordeaux        |
| 24    | Champagne       |
| 8     | English Channel |
| 4     | Genoa           |
| 5     | Valencia        |
`, fmtd)
}

func TestFormatRowsInvalidQuery(t *testing.T) {
	db, err := sql.Open("sqlite3", fmt.Sprintf(TEST_CONN_STRING_PATTERN, "format-rows"))
	require.NoError(t, err)
	store, err := NewStore(db)
	assert.NoError(t, err)

	_, err = store.db.Query("SELECT count(name), distinct(trade_node) from provinces where region = 'France'")
	assert.Error(t, err)
}

func TestFormatStringSlice(t *testing.T) {
	tests := []struct {
		name string
		s    []string
		want string
	}{
		{
			name: "empty",
			s:    []string{},
			want: "",
		},
		{
			name: "single",
			s:    []string{"foo"},
			want: "foo",
		},
		{
			name: "two",
			s:    []string{"foo", "bar"},
			want: "foo and bar",
		},
		{
			name: "three",
			s:    []string{"foo", "bar", "baz"},
			want: "foo, bar and baz",
		},
		{
			name: "four",
			s:    []string{"foo", "bar", "baz", "biz"},
			want: "foo, bar, baz and biz",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if got := FormatStringSlice(tt.s); got != tt.want {
				t.Errorf("FormatStringSlice() = %v, want %v", got, tt.want)
			}
		})
	}
}