package components

import "github.com/tigorlazuardi/redmage/views"
import "strconv"
import "github.com/tigorlazuardi/redmage/views/utils"
import "strings"
import "fmt"

type PaginationData struct {
	Offset      int64
	Limit       int64
	BaseURL     string
	Total       int64
	Classes     []string
	UnhideRange int
}

type pageStatus int

const (
	pageStatusShow = iota
	pageStatusHidden
	pageStatusDot
)

func (pgdata PaginationData) GetUnhideRange() int {
	if pgdata.UnhideRange < 1 {
		return 1
	}
	return pgdata.UnhideRange
}

func (pgdata PaginationData) getPageStatus(page int) pageStatus {
	if page < 2 {
		return pageStatusShow
	}
	lastPage := (pgdata.Total / max(pgdata.Limit, 1)) + 1
	if page == int(lastPage) {
		return pageStatusShow
	}
	current := pgdata.GetCurrentPage()
	unhideRange := pgdata.GetUnhideRange()
	if page == current-unhideRange-1 {
		return pageStatusDot
	}
	if page == current+unhideRange+1 {
		return pageStatusDot
	}
	if page >= current-unhideRange && page <= current+unhideRange {
		return pageStatusShow
	}

	return pageStatusHidden
}

func (pgdata PaginationData) GetCurrentPage() int {
	return int(pgdata.Offset/pgdata.Limit) + 1
}

func (pgdata PaginationData) GetTotalPage() int {
	return int(pgdata.Total/max(pgdata.Limit, 1)) + 1
}

templ Pagination(c *views.Context, data PaginationData) {
	if data.Total > data.Limit {
		<div
			x-data={ fmt.Sprintf(`{
                    page: %d,
                    qs: %s,
                    max: %d,
                    get vals() { return JSON.stringify({...this.qs, offset: (Math.max(1, Math.min(this.page, this.max))-1) * (this.qs.limit || 25)}) }
                }`, data.GetCurrentPage(), c.JSONQuery(), data.GetTotalPage()) }
		>
			<div class="join">
				for i, count := 1, int64(0); count < data.Total; i, count = i+1, count+data.Limit {
					if data.GetTotalPage() <= 5 || data.getPageStatus(i) == pageStatusShow {
						<a
							href={ c.URLWithExtraQuery(data.BaseURL, "offset", strconv.FormatInt(count, 10)) }
							class={ utils.CXX(
                        "join-item btn no-underline", true,
                        "btn-active", data.Offset <= count &&  data.Offset > count - data.Limit ,
                        strings.Join(data.Classes, " "), len(data.Classes) > 0,
                    ) }
						>{ strconv.Itoa(i) }</a>
					} else if data.getPageStatus(i) == pageStatusDot {
						<span @click="$refs.dialog.showModal()" class="join-item btn">...</span>
					}
				}
			</div>
			<dialog
				onclick="if (event.target === this) this.close()"
				x-ref="dialog"
				class="modal"
			>
				<div class="modal-box">
					<h2 class="my-2">Seek Page</h2>
					<div
						id="page-seeker"
						class="join flex"
					>
						<input
							type="number"
							value={ strconv.Itoa(data.GetCurrentPage()) }
							min="1"
							max={ strconv.Itoa(data.GetTotalPage()) }
							placeholder="Seek Page"
							class="input input-bordered join-item w-full"
							x-model="page"
							hx-get={ c.Request.URL.Path }
							hx-target="main"
							hx-select="main"
							hx-swap="outerHTML"
							hx-push-url="true"
							hx-trigger="custom"
							@keyup.enter="htmx.trigger($el, 'custom')"
							:hx-vals="vals"
						/>
						<button
							hx-get={ c.Request.URL.Path }
							hx-target="main"
							hx-select="main"
							hx-swap="outerHTML"
							hx-push-url="true"
							:hx-vals="vals"
							hx-trigger="click"
							type="button"
							class="btn btn-primary join-item"
						>Go</button>
					</div>
				</div>
			</dialog>
		</div>
	}
}