/*
 * Copyright 2025 coze-dev Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package builtin

import (
	"fmt"
	"strconv"
	"time"
	"unicode/utf8"

	"github.com/coze-dev/coze-studio/backend/infra/contract/document"
	"github.com/coze-dev/coze-studio/backend/pkg/lang/ptr"
)

const (
	timeFormat = "2006-01-02 15:04:05"
)

func assertValAs(typ document.TableColumnType, val string) (*document.ColumnData, error) {
	if val == "" {
		return &document.ColumnData{
			Type: typ,
		}, nil
	}

	switch typ {
	case document.TableColumnTypeString:
		return &document.ColumnData{
			Type:      document.TableColumnTypeString,
			ValString: &val,
		}, nil

	case document.TableColumnTypeInteger:
		i, err := strconv.ParseInt(val, 10, 64)
		if err != nil {
			return nil, err
		}
		return &document.ColumnData{
			Type:       document.TableColumnTypeInteger,
			ValInteger: &i,
		}, nil

	case document.TableColumnTypeTime:
		if val == "" {
			var emptyTime time.Time
			return &document.ColumnData{
				Type:    document.TableColumnTypeTime,
				ValTime: ptr.Of(emptyTime),
			}, nil
		}
		// Supports timestamp and time string
		i, err := strconv.ParseInt(val, 10, 64)
		if err == nil {
			t := time.Unix(i, 0)
			return &document.ColumnData{
				Type:    document.TableColumnTypeTime,
				ValTime: &t,
			}, nil

		}
		t, err := time.Parse(timeFormat, val)
		if err != nil {
			return nil, err
		}
		return &document.ColumnData{
			Type:    document.TableColumnTypeTime,
			ValTime: &t,
		}, nil

	case document.TableColumnTypeNumber:
		f, err := strconv.ParseFloat(val, 64)
		if err != nil {
			return nil, err
		}

		return &document.ColumnData{
			Type:      document.TableColumnTypeNumber,
			ValNumber: &f,
		}, nil

	case document.TableColumnTypeBoolean:
		t, err := strconv.ParseBool(val)
		if err != nil {
			return nil, err
		}
		return &document.ColumnData{
			Type:       document.TableColumnTypeBoolean,
			ValBoolean: &t,
		}, nil
	case document.TableColumnTypeImage:
		return &document.ColumnData{
			Type:     document.TableColumnTypeImage,
			ValImage: &val,
		}, nil
	default:
		return nil, fmt.Errorf("[assertValAs] type not support, type=%d, val=%s", typ, val)
	}
}

func assertValAsForce(typ document.TableColumnType, val string, nullable bool) *document.ColumnData {
	cd := &document.ColumnData{
		Type: typ,
	}
	switch typ {
	case document.TableColumnTypeString:
		cd.ValString = &val
	case document.TableColumnTypeInteger:
		if i, err := strconv.ParseInt(val, 10, 64); err == nil {
			cd.ValInteger = ptr.Of(i)
		} else if !nullable {
			cd.ValInteger = ptr.Of(int64(0))
		}
	case document.TableColumnTypeTime:
		if t, err := time.Parse(timeFormat, val); err == nil {
			cd.ValTime = ptr.Of(t)
		} else if !nullable {
			cd.ValTime = ptr.Of(time.Time{})
		}
	case document.TableColumnTypeNumber:
		if f, err := strconv.ParseFloat(val, 64); err == nil {
			cd.ValNumber = ptr.Of(f)
		} else if !nullable {
			cd.ValNumber = ptr.Of(0.0)
		}
	case document.TableColumnTypeBoolean:
		if t, err := strconv.ParseBool(val); err == nil {
			cd.ValBoolean = ptr.Of(t)
		} else if !nullable {
			cd.ValBoolean = ptr.Of(false)
		}
	case document.TableColumnTypeImage:
		cd.ValImage = ptr.Of(val)
	default:
		cd.ValString = &val
	}

	return cd
}

func assertVal(val string) document.ColumnData {
	// TODO: Do not process images first
	if val == "" {
		return document.ColumnData{
			Type:      document.TableColumnTypeUnknown,
			ValString: &val,
		}
	}
	if t, err := strconv.ParseBool(val); err == nil {
		return document.ColumnData{
			Type:       document.TableColumnTypeBoolean,
			ValBoolean: &t,
		}
	}
	if i, err := strconv.ParseInt(val, 10, 64); err == nil {
		return document.ColumnData{
			Type:       document.TableColumnTypeInteger,
			ValInteger: &i,
		}
	}
	if f, err := strconv.ParseFloat(val, 64); err == nil {
		return document.ColumnData{
			Type:      document.TableColumnTypeNumber,
			ValNumber: &f,
		}
	}
	if t, err := time.Parse(timeFormat, val); err == nil {
		return document.ColumnData{
			Type:    document.TableColumnTypeTime,
			ValTime: &t,
		}
	}
	return document.ColumnData{
		Type:      document.TableColumnTypeString,
		ValString: &val,
	}
}

func transformColumnType(src, dst document.TableColumnType) document.TableColumnType {
	if src == document.TableColumnTypeUnknown {
		return dst
	}
	if dst == document.TableColumnTypeUnknown {
		return src
	}
	if dst == document.TableColumnTypeString {
		return dst
	}
	if src == dst {
		return dst
	}
	if src == document.TableColumnTypeInteger && dst == document.TableColumnTypeNumber {
		return dst
	}
	return document.TableColumnTypeString
}

func charCount(text string) int64 {
	return int64(utf8.RuneCountInString(text))
}