//
// dialect_postgres_test.go
// Copyright (C) 2023 tiglog <me@tiglog.com>
//
// Distributed under terms of the MIT license.
//

//go:build !integration
// +build !integration

package sqldb_test

import (
	"database/sql"
	"reflect"
	"testing"
	"time"

	"git.hexq.cn/tiglog/golib/gdb/sqldb"
	"github.com/poy/onpar"
	"github.com/poy/onpar/expect"
	"github.com/poy/onpar/matchers"
)

func TestPostgresDialect(t *testing.T) {

	type testContext struct {
		t       *testing.T
		dialect sqldb.PostgresDialect
	}

	o := onpar.BeforeEach(onpar.New(t), func(t *testing.T) testContext {
		return testContext{
			t: t,
			dialect: sqldb.PostgresDialect{
				LowercaseFields: false,
			},
		}
	})
	defer o.Run()

	o.Group("ToSqlType", func() {
		tests := []struct {
			name     string
			value    interface{}
			maxSize  int
			autoIncr bool
			expected string
		}{
			{"bool", true, 0, false, "boolean"},
			{"int8", int8(1), 0, false, "integer"},
			{"uint8", uint8(1), 0, false, "integer"},
			{"int16", int16(1), 0, false, "integer"},
			{"uint16", uint16(1), 0, false, "integer"},
			{"int32", int32(1), 0, false, "integer"},
			{"int (treated as int32)", int(1), 0, false, "integer"},
			{"uint32", uint32(1), 0, false, "integer"},
			{"uint (treated as uint32)", uint(1), 0, false, "integer"},
			{"int64", int64(1), 0, false, "bigint"},
			{"uint64", uint64(1), 0, false, "bigint"},
			{"float32", float32(1), 0, false, "real"},
			{"float64", float64(1), 0, false, "double precision"},
			{"[]uint8", []uint8{1}, 0, false, "bytea"},
			{"NullInt64", sql.NullInt64{}, 0, false, "bigint"},
			{"NullFloat64", sql.NullFloat64{}, 0, false, "double precision"},
			{"NullBool", sql.NullBool{}, 0, false, "boolean"},
			{"Time", time.Time{}, 0, false, "timestamp with time zone"},
			{"default-size string", "", 0, false, "text"},
			{"sized string", "", 50, false, "varchar(50)"},
			{"large string", "", 1024, false, "varchar(1024)"},
		}
		for _, t := range tests {
			o.Spec(t.name, func(tt testContext) {
				typ := reflect.TypeOf(t.value)
				sqlType := tt.dialect.ToSqlType(typ, t.maxSize, t.autoIncr)
				expect.Expect(tt.t, sqlType).To(matchers.Equal(t.expected))
			})
		}
	})

	o.Spec("AutoIncrStr", func(tt testContext) {
		expect.Expect(t, tt.dialect.AutoIncrStr()).To(matchers.Equal(""))
	})

	o.Spec("AutoIncrBindValue", func(tt testContext) {
		expect.Expect(t, tt.dialect.AutoIncrBindValue()).To(matchers.Equal("default"))
	})

	o.Spec("AutoIncrInsertSuffix", func(tt testContext) {
		cm := sqldb.ColumnMap{
			ColumnName: "foo",
		}
		expect.Expect(t, tt.dialect.AutoIncrInsertSuffix(&cm)).To(matchers.Equal(` returning "foo"`))
	})

	o.Spec("CreateTableSuffix", func(tt testContext) {
		expect.Expect(t, tt.dialect.CreateTableSuffix()).To(matchers.Equal(""))
	})

	o.Spec("CreateIndexSuffix", func(tt testContext) {
		expect.Expect(t, tt.dialect.CreateIndexSuffix()).To(matchers.Equal("using"))
	})

	o.Spec("DropIndexSuffix", func(tt testContext) {
		expect.Expect(t, tt.dialect.DropIndexSuffix()).To(matchers.Equal(""))
	})

	o.Spec("TruncateClause", func(tt testContext) {
		expect.Expect(t, tt.dialect.TruncateClause()).To(matchers.Equal("truncate"))
	})

	o.Spec("SleepClause", func(tt testContext) {
		expect.Expect(t, tt.dialect.SleepClause(1*time.Second)).To(matchers.Equal("pg_sleep(1.000000)"))
		expect.Expect(t, tt.dialect.SleepClause(100*time.Millisecond)).To(matchers.Equal("pg_sleep(0.100000)"))
	})

	o.Spec("BindVar", func(tt testContext) {
		expect.Expect(t, tt.dialect.BindVar(0)).To(matchers.Equal("$1"))
		expect.Expect(t, tt.dialect.BindVar(4)).To(matchers.Equal("$5"))
	})

	o.Group("QuoteField", func() {
		o.Spec("By default, case is preserved", func(tt testContext) {
			expect.Expect(t, tt.dialect.QuoteField("Foo")).To(matchers.Equal(`"Foo"`))
			expect.Expect(t, tt.dialect.QuoteField("bar")).To(matchers.Equal(`"bar"`))
		})

		o.Group("With LowercaseFields set to true", func() {
			o1 := onpar.BeforeEach(o, func(tt testContext) testContext {
				tt.dialect.LowercaseFields = true
				return tt
			})

			o1.Spec("fields are lowercased", func(tt testContext) {
				expect.Expect(t, tt.dialect.QuoteField("Foo")).To(matchers.Equal(`"foo"`))
			})
		})
	})

	o.Group("QuotedTableForQuery", func() {
		o.Spec("using the default schema", func(tt testContext) {
			expect.Expect(t, tt.dialect.QuotedTableForQuery("", "foo")).To(matchers.Equal(`"foo"`))
		})

		o.Spec("with a supplied schema", func(tt testContext) {
			expect.Expect(t, tt.dialect.QuotedTableForQuery("foo", "bar")).To(matchers.Equal(`foo."bar"`))
		})
	})

	o.Spec("IfSchemaNotExists", func(tt testContext) {
		expect.Expect(t, tt.dialect.IfSchemaNotExists("foo", "bar")).To(matchers.Equal("foo if not exists"))
	})

	o.Spec("IfTableExists", func(tt testContext) {
		expect.Expect(t, tt.dialect.IfTableExists("foo", "bar", "baz")).To(matchers.Equal("foo if exists"))
	})

	o.Spec("IfTableNotExists", func(tt testContext) {
		expect.Expect(t, tt.dialect.IfTableNotExists("foo", "bar", "baz")).To(matchers.Equal("foo if not exists"))
	})
}