// Copyright 2017 FoxyUtils ehf. All rights reserved.
//
// Use of this source code is governed by the terms of the Affero GNU General
// Public License version 3.0 as published by the Free Software Foundation and
// appearing in the file LICENSE included in the packaging of this file. A
// commercial license can be purchased on https://unidoc.io.

package document

import (
	"github.com/unidoc/unioffice"
	"github.com/unidoc/unioffice/measurement"
	"github.com/unidoc/unioffice/schema/soo/ofc/sharedTypes"
	"github.com/unidoc/unioffice/schema/soo/wml"
)

// ParagraphStyleProperties is the styling information for a paragraph.
type ParagraphStyleProperties struct {
	x *wml.CT_PPrGeneral
}

// X returns the inner wrapped XML type.
func (p ParagraphStyleProperties) X() *wml.CT_PPrGeneral {
	return p.x
}

// SetAlignment controls the paragraph alignment
func (p ParagraphStyleProperties) SetAlignment(align wml.ST_Jc) {
	if align == wml.ST_JcUnset {
		p.x.Jc = nil
	} else {
		p.x.Jc = wml.NewCT_Jc()
		p.x.Jc.ValAttr = align
	}
}

// AddTabStop adds a tab stop to the paragraph.
func (p ParagraphStyleProperties) AddTabStop(position measurement.Distance, justificaton wml.ST_TabJc, leader wml.ST_TabTlc) {
	if p.x.Tabs == nil {
		p.x.Tabs = wml.NewCT_Tabs()
	}
	tab := wml.NewCT_TabStop()
	tab.LeaderAttr = leader
	tab.ValAttr = justificaton
	tab.PosAttr.Int64 = unioffice.Int64(int64(position / measurement.Twips))
	p.x.Tabs.Tab = append(p.x.Tabs.Tab, tab)
}

// SetSpacing sets the spacing that comes before and after the paragraph.
func (p ParagraphStyleProperties) SetSpacing(before, after measurement.Distance) {
	if p.x.Spacing == nil {
		p.x.Spacing = wml.NewCT_Spacing()
	}

	if before == measurement.Zero {
		p.x.Spacing.BeforeAttr = nil
	} else {
		p.x.Spacing.BeforeAttr = &sharedTypes.ST_TwipsMeasure{}
		p.x.Spacing.BeforeAttr.ST_UnsignedDecimalNumber = unioffice.Uint64(uint64(before / measurement.Twips))
	}

	if after == measurement.Zero {
		p.x.Spacing.AfterAttr = nil
	} else {
		p.x.Spacing.AfterAttr = &sharedTypes.ST_TwipsMeasure{}
		p.x.Spacing.AfterAttr.ST_UnsignedDecimalNumber = unioffice.Uint64(uint64(after / measurement.Twips))
	}
}

// SetKeepNext controls if the paragraph is kept with the next paragraph.
func (p ParagraphStyleProperties) SetKeepNext(b bool) {
	if !b {
		p.x.KeepNext = nil
	} else {
		p.x.KeepNext = wml.NewCT_OnOff()
	}
}

// SetKeepOnOnePage controls if all lines in a paragraph are kept on the same
// page.
func (p ParagraphStyleProperties) SetKeepOnOnePage(b bool) {
	if !b {
		p.x.KeepLines = nil
	} else {
		p.x.KeepLines = wml.NewCT_OnOff()
	}
}

// SetOutlineLevel sets the outline level of this style.
func (p ParagraphStyleProperties) SetOutlineLevel(lvl int) {
	p.x.OutlineLvl = wml.NewCT_DecimalNumber()
	p.x.OutlineLvl.ValAttr = int64(lvl)
}

// SetContextualSpacing controls whether to Ignore Spacing Above and Below When
// Using Identical Styles
func (p ParagraphStyleProperties) SetContextualSpacing(b bool) {
	if !b {
		p.x.ContextualSpacing = nil
	} else {
		p.x.ContextualSpacing = wml.NewCT_OnOff()
	}
}

// SetLeftIndent controls the left indent of the paragraph.
func (p ParagraphStyleProperties) SetLeftIndent(m measurement.Distance) {
	if p.x.Ind == nil {
		p.x.Ind = wml.NewCT_Ind()
	}
	if m == measurement.Zero {
		p.x.Ind.LeftAttr = nil
	} else {
		p.x.Ind.LeftAttr = &wml.ST_SignedTwipsMeasure{}
		p.x.Ind.LeftAttr.Int64 = unioffice.Int64(int64(m / measurement.Twips))
	}
}

// SetStartIndent controls the start indent of the paragraph.
func (p ParagraphStyleProperties) SetStartIndent(m measurement.Distance) {
	if p.x.Ind == nil {
		p.x.Ind = wml.NewCT_Ind()
	}
	if m == measurement.Zero {
		p.x.Ind.StartAttr = nil
	} else {
		p.x.Ind.StartAttr = &wml.ST_SignedTwipsMeasure{}
		p.x.Ind.StartAttr.Int64 = unioffice.Int64(int64(m / measurement.Twips))
	}
}

// SetHangingIndent controls the hanging indent of the paragraph.
func (p ParagraphStyleProperties) SetHangingIndent(m measurement.Distance) {
	if p.x.Ind == nil {
		p.x.Ind = wml.NewCT_Ind()
	}
	if m == measurement.Zero {
		p.x.Ind.HangingAttr = nil
	} else {
		p.x.Ind.HangingAttr = &sharedTypes.ST_TwipsMeasure{}
		p.x.Ind.HangingAttr.ST_UnsignedDecimalNumber = unioffice.Uint64(uint64(m / measurement.Twips))
	}
}