package source_test

import (
	"fmt"
	"testing"

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

	"github.com/neilotoole/sq/drivers/csv"
	"github.com/neilotoole/sq/drivers/mysql"
	"github.com/neilotoole/sq/drivers/postgres"
	"github.com/neilotoole/sq/drivers/sqlite3"
	"github.com/neilotoole/sq/drivers/sqlserver"
	"github.com/neilotoole/sq/drivers/xlsx"
	"github.com/neilotoole/sq/libsq/source"
	"github.com/neilotoole/sq/testh/tutil"
)

func TestIsValidGroup(t *testing.T) {
	testCases := []struct {
		in    string
		valid bool
	}{
		{"", true},
		{" ", false},
		{"/", true},
		{"//", false},
		{"prod", true},
		{"/prod", false},
		{"prod/", false},
		{"prod/user", true},
		{"prod/user/", false},
		{"prod/user/pg", true},
		{"pr_od", true},
	}

	for i, tc := range testCases {
		tc := tc
		t.Run(tutil.Name(i, tc.in), func(t *testing.T) {
			gotValid := source.IsValidGroup(tc.in)
			require.Equal(t, tc.valid, gotValid)
		})
	}
}

func TestValidHandle(t *testing.T) {
	testCases := []struct {
		in      string
		wantErr bool
	}{
		{in: "", wantErr: true},
		{in: "  ", wantErr: true},
		{in: "handle", wantErr: true},
		{in: "@", wantErr: true},
		{in: "1handle", wantErr: true},
		{in: "@ handle", wantErr: true},
		{in: "@handle ", wantErr: true},
		{in: "@handle#", wantErr: true},
		{in: "@1handle", wantErr: true},
		{in: "@1", wantErr: true},
		{in: "@?handle", wantErr: true},
		{in: "@?handle#", wantErr: true},
		{in: "@ha\nndle", wantErr: true},
		{in: "@group/handle"},
		{in: "@group/sub/sub2/handle"},
		{in: "@group/handle"},
		{in: "@group/", wantErr: true},
		{in: "@group/wub/", wantErr: true},
		{in: "@handle"},
		{in: "@handle1"},
		{in: "@h1"},
		{in: "@h_"},
		{in: "@h__1"},
		{in: "@h__1__a___"},
	}

	for i, tc := range testCases {
		tc := tc
		t.Run(tutil.Name(i, tc.in), func(t *testing.T) {
			gotErr := source.ValidHandle(tc.in)
			if tc.wantErr {
				require.Error(t, gotErr)
			} else {
				require.NoError(t, gotErr)
			}
		})
	}
}

func TestSuggestHandle(t *testing.T) {
	testCases := []struct {
		typ   source.DriverType
		loc   string
		want  string
		taken []string
	}{
		{
			typ:  csv.TypeCSV,
			loc:  "/path/to/actor.csv",
			want: "@actor",
		},
		{
			typ:  source.TypeNone,
			loc:  "/path/to/actor.csv",
			want: "@actor",
		},
		{
			typ:  xlsx.Type,
			loc:  "/path/to/sakila.xlsx",
			want: "@sakila",
		},
		{
			typ:  xlsx.Type,
			loc:  "/path/to/123_sakila.xlsx",
			want: "@h123_sakila",
		},
		{
			typ:  xlsx.Type,
			loc:  "/path/to/__sakila.xlsx",
			want: "@h__sakila",
		},
		{
			typ:  xlsx.Type,
			loc:  "/path/to/sakila.something.xlsx",
			want: "@sakila_something",
		},
		{
			typ:  xlsx.Type,
			loc:  "/path/to/😀abc123😀",
			want: "@h_abc123_",
		},
		{
			typ:  source.TypeNone,
			loc:  "/path/to/sakila.xlsx",
			want: "@sakila",
		},
		{
			typ:   xlsx.Type,
			loc:   "/path/to/sakila.xlsx",
			want:  "@sakila2",
			taken: []string{"@sakila", "@sakila1"},
		},
		{
			typ:  sqlite3.Type,
			loc:  "sqlite3:///path/to/sakila.db",
			want: "@sakila",
		},
		{
			typ:  source.TypeNone,
			loc:  "sqlite3:///path/to/sakila.db",
			want: "@sakila",
		},
		{
			typ:  sqlite3.Type,
			loc:  "/path/to/sakila.db",
			want: "@sakila",
		},
		{
			typ:  sqlserver.Type,
			loc:  "sqlserver://sakila_p_ssW0rd@localhost?database=sakila",
			want: "@sakila",
		},
		{
			typ:  source.TypeNone,
			loc:  "sqlserver://sakila_p_ssW0rd@localhost?database=sakila",
			want: "@sakila",
		},
		{
			typ:   source.TypeNone,
			loc:   "sqlserver://sakila_p_ssW0rd@localhost?database=sakila",
			want:  "@sakila2",
			taken: []string{"@sakila"},
		},
		{
			typ:  postgres.Type,
			loc:  "postgres://sakila_p_ssW0rd@localhost/sakila",
			want: "@sakila",
		},
		{
			typ:  source.TypeNone,
			loc:  "postgres://sakila_p_ssW0rd@localhost/sakila",
			want: "@sakila",
		},
		{
			typ:  postgres.Type,
			loc:  "postgres://sakila_p_ssW0rd@localhost/sakila",
			want: "@sakila",
		},
		{
			typ:  mysql.Type,
			loc:  "mysql://sakila_p_ssW0rd@localhost:3306/sakila",
			want: "@sakila",
		},
		{
			typ:  source.TypeNone,
			loc:  "mysql://sakila_p_ssW0rd@localhost:3306/sakila",
			want: "@sakila",
		},
	}

	for i, tc := range testCases {
		tc := tc
		t.Run(tutil.Name(i, tc.typ, tc.loc), func(t *testing.T) {
			set := &source.Collection{}
			for i := range tc.taken {
				err := set.Add(&source.Source{
					Handle:   tc.taken[i],
					Type:     sqlite3.Type,
					Location: "/tmp/taken.db",
				})
				require.NoError(t, err)
			}

			got, err := source.SuggestHandle(set, tc.typ, tc.loc)
			require.NoError(t, err)
			require.Equal(t, tc.want, got)
		})
	}
}

func TestParseTableHandle(t *testing.T) {
	testCases := []struct {
		input  string
		valid  bool
		handle string
		table  string
	}{
		{"@handle1", true, "@handle1", ""},
		{"  @handle1 ", true, "@handle1", ""},
		{"@handle1.tbl1", true, "@handle1", "tbl1"},
		{"  @handle1.tbl1  ", true, "@handle1", "tbl1"},
		{"@handle1 .tbl1", false, "", ""},
		{"@handle1. tbl1", false, "", ""},
		{"@handle1 . tbl1", false, "", ""},
		{".tbl1", true, "", "tbl1"},
		{" .tbl1 ", true, "", "tbl1"},
		{" ._tbl1 ", true, "", "_tbl1"},
		{"invalidhandle", false, "", ""},
		{"invalidhandle.tbl1", false, "", ""},
		{"invalidhandle.@tbl1", false, "", ""},
		{".invalid table", false, "", ""},
		{"", false, "", ""},
		{"  ", false, "", ""},
	}

	for i, tc := range testCases {
		tc := tc

		t.Run(fmt.Sprintf("[%d]__%s", i, tc.input), func(t *testing.T) {
			handle, table, err := source.ParseTableHandle(tc.input)
			if tc.valid {
				assert.NoError(t, err)
			} else {
				assert.Error(t, err)
			}
			assert.Equal(t, tc.handle, handle)
			assert.Equal(t, tc.table, table)
		})
	}
}