package handlers

import (
	"context"
	"net/http"
	"strings"
	"time"

	"git.soup.land/soup/sxgo/ssr"
	"lookbook/internal/components"
	"lookbook/internal/data/item"
	"lookbook/internal/data/media"
	"lookbook/internal/data/tag"
)

type itemPageContent struct {
	Item    itemPageData
	IsAdmin bool
}

type itemPageData struct {
	ID            string
	Title         *string
	Description   *string
	LinkURL       *string
	ItemType      string
	EmbedHTML     *string
	EmbedVideoURL *string
	Tags          []string
	CreatedAt     string
	ThumbnailID   *int64
	MediaID       *int64
	MediaIsVideo  bool
}

func (c itemPageContent) Render(sw *ssr.Writer) error {
	return sw.Tmpl(c, `
<div class="item-page">
	<a href="/" class="back-link">&larr; BACK</a>

	<article class="item-detail">
		{{if eq .Item.ItemType "quote"}}
		<div class="quote-detail">
			<blockquote>{{.Item.Description}}</blockquote>
			{{if .Item.Title}}<cite>— {{.Item.Title}}</cite>{{end}}
		</div>
		{{else if eq .Item.ItemType "video"}}
		<div class="video-container">
			<video controls>
				<source src="/media/{{.Item.MediaID}}" type="video/mp4">
			</video>
		</div>
		{{else if eq .Item.ItemType "embed"}}
		{{if .Item.EmbedVideoURL}}
		<div class="video-container">
			<video loop muted playsinline poster="{{if .Item.ThumbnailID}}/media/{{.Item.ThumbnailID}}{{end}}">
				<source src="/proxy/video/{{.Item.ID}}" type="video/mp4">
			</video>
			<div class="video-overlay" onclick="playVideo(this)">
				<span class="play-button">&#9654;</span>
			</div>
		</div>
		{{else if .Item.ThumbnailID}}
		<div class="image-container">
			<img src="/media/{{.Item.ThumbnailID}}" alt="{{if .Item.Title}}{{.Item.Title}}{{else}}Embed{{end}}">
		</div>
		{{else if .Item.MediaID}}
		<div class="image-container">
			<img src="/media/{{.Item.MediaID}}" alt="{{if .Item.Title}}{{.Item.Title}}{{else}}Embed{{end}}">
		</div>
		{{end}}
		{{else if .Item.MediaID}}
		<div class="image-container">
			<img src="/media/{{.Item.MediaID}}" alt="{{if .Item.Title}}{{.Item.Title}}{{else}}Image{{end}}">
		</div>
		{{else if .Item.ThumbnailID}}
		<div class="image-container">
			<img src="/media/{{.Item.ThumbnailID}}" alt="{{if .Item.Title}}{{.Item.Title}}{{else}}Image{{end}}">
		</div>
		{{end}}

		<div class="item-meta">
			{{if .Item.Title}}
			<h1>{{.Item.Title}}</h1>
			{{end}}

			{{if and .Item.Description (ne .Item.ItemType "quote")}}
			<p class="description">{{.Item.Description}}</p>
			{{end}}

			{{if .Item.LinkURL}}
			<a href="{{.Item.LinkURL}}" target="_blank" rel="noopener" class="source-link">{{.Item.LinkURL}}</a>
			{{end}}

			{{if .Item.Tags}}
			<div class="item-tags">
				{{range .Item.Tags}}
				<a href="/?tag={{.}}" class="item-tag">{{.}}</a>
				{{end}}
			</div>
			{{end}}

			<time class="timestamp">{{.Item.CreatedAt}}</time>
		</div>

		{{if .IsAdmin}}
		<div class="item-actions">
			<button class="btn" onclick="editItem('{{.Item.ID}}')">EDIT</button>
			{{if .Item.LinkURL}}<button class="btn" onclick="refreshMetadata('{{.Item.ID}}')">REFRESH</button>{{end}}
			<button class="btn btn-danger" onclick="deleteItem('{{.Item.ID}}')">DELETE</button>
		</div>
		{{end}}
	</article>
</div>

{{if .IsAdmin}}
<div id="edit-modal" class="modal" onclick="if(event.target===this)hideEditModal()">
	<div class="modal-content">
		<div class="modal-header">
			<h2>EDIT ITEM</h2>
			<button class="btn-close" onclick="hideEditModal()">&times;</button>
		</div>
		<div class="modal-body">
			<form id="edit-form" onsubmit="return submitEdit(event)">
				<input type="hidden" name="id" value="{{.Item.ID}}">
				<input type="text" name="title" placeholder="Title" value="{{if .Item.Title}}{{.Item.Title}}{{end}}">
				<textarea name="description" placeholder="Description">{{if .Item.Description}}{{.Item.Description}}{{end}}</textarea>
				<input type="url" name="linkUrl" placeholder="Link URL" value="{{if .Item.LinkURL}}{{.Item.LinkURL}}{{end}}">
				<input type="text" name="tags" placeholder="Tags (comma-separated)" value="{{range $i, $t := .Item.Tags}}{{if $i}}, {{end}}{{$t}}{{end}}">
				<button type="submit" class="btn">SAVE</button>
			</form>
			<hr style="margin: 1.5rem 0; border: none; border-top: 1px solid var(--border);">
			<form id="replace-media-form" onsubmit="return submitReplaceMedia(event, '{{.Item.ID}}')">
				<label style="display: block; margin-bottom: 0.5rem; font-size: 0.875rem;">REPLACE IMAGE/VIDEO</label>
				<input type="file" name="file" accept="image/*,video/*" required>
				<button type="submit" class="btn" style="margin-top: 0.5rem;">REPLACE</button>
			</form>
		</div>
	</div>
</div>
{{end}}
`)
}

// HandleItemPage handles GET /item/{id}
func HandleItemPage(rc *RequestContext, w http.ResponseWriter, r *http.Request) error {
	pubID := r.PathValue("id")
	if pubID == "" {
		http.NotFound(w, r)
		return nil
	}

	ctx, cancel := context.WithTimeout(r.Context(), 10*time.Second)
	defer cancel()

	it, err := item.QFindByPubID(ctx, rc.DB, pubID)
	if err != nil {
		return err
	}
	if it == nil {
		http.NotFound(w, r)
		return nil
	}

	// Get tags
	itemTags, err := tag.QTagsForItem(ctx, rc.DB, it.ID)
	if err != nil {
		return err
	}
	tagNames := make([]string, len(itemTags))
	for i, t := range itemTags {
		tagNames[i] = t.Name
	}

	// Get media
	var thumbnailID, mediaID *int64
	var mediaIsVideo bool
	mediaList, err := media.QFindByItemID(ctx, rc.DB, it.ID)
	if err != nil {
		return err
	}
	for _, m := range mediaList {
		if m.MediaType == "thumbnail" {
			thumbnailID = &m.ID
		} else if m.MediaType == "original" {
			mediaID = &m.ID
			mediaIsVideo = strings.HasPrefix(m.ContentType, "video/")
		}
	}

	data := itemPageData{
		ID:            it.PubID,
		Title:         item.Ptr(it.Title),
		Description:   item.Ptr(it.Description),
		LinkURL:       item.Ptr(it.LinkURL),
		ItemType:      it.ItemType,
		EmbedHTML:     item.Ptr(it.EmbedHTML),
		EmbedVideoURL: item.Ptr(it.EmbedVideoURL),
		Tags:          tagNames,
		CreatedAt:     it.CreatedAt.Format("Jan 2, 2006"),
		ThumbnailID:   thumbnailID,
		MediaID:       mediaID,
		MediaIsVideo:  mediaIsVideo,
	}

	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	sw := ssr.NewWriter(w, rc.TmplCache)

	var title string
	if it.Title.Valid {
		title = it.Title.V
	}

	page := components.Page{
		Title:   title,
		IsAdmin: rc.IsAdmin,
		Content: itemPageContent{Item: data, IsAdmin: rc.IsAdmin},
	}

	return page.Render(sw)
}