package controllers

import (
	"bytes"
	"fmt"
	"io"
	"math"
	"net/http"
	"os"
	"strconv"
	"strings"
	"time"

	"github.com/akhilrex/podgrab/db"
	"github.com/akhilrex/podgrab/service"
	"github.com/gin-gonic/gin"
)

type SearchGPodderData struct {
	Q string `binding:"required" form:"q" json:"q" query:"q"`
}
type SettingModel struct {
	DownloadOnAdd                 bool `form:"downloadOnAdd" json:"downloadOnAdd" query:"downloadOnAdd"`
	InitialDownloadCount          int  `form:"initialDownloadCount" json:"initialDownloadCount" query:"initialDownloadCount"`
	AutoDownload                  bool `form:"autoDownload" json:"autoDownload" query:"autoDownload"`
	AppendDateToFileName          bool `form:"appendDateToFileName" json:"appendDateToFileName" query:"appendDateToFileName"`
	AppendEpisodeNumberToFileName bool `form:"appendEpisodeNumberToFileName" json:"appendEpisodeNumberToFileName" query:"appendEpisodeNumberToFileName"`
	DarkMode                      bool `form:"darkMode" json:"darkMode" query:"darkMode"`
}

func AddPage(c *gin.Context) {
	setting := c.MustGet("setting").(*db.Setting)
	c.HTML(http.StatusOK, "addPodcast.html", gin.H{"title": "Add Podcast", "setting": setting})
}
func HomePage(c *gin.Context) {
	//var podcasts []db.Podcast
	podcasts := service.GetAllPodcasts("")
	setting := c.MustGet("setting").(*db.Setting)
	c.HTML(http.StatusOK, "index.html", gin.H{"title": "Podgrab", "podcasts": podcasts, "setting": setting})
}
func PodcastPage(c *gin.Context) {
	var searchByIdQuery SearchByIdQuery
	if c.ShouldBindUri(&searchByIdQuery) == nil {

		var podcast db.Podcast

		if err := db.GetPodcastById(searchByIdQuery.Id, &podcast); err == nil {
			var pagination Pagination
			if c.ShouldBindQuery(&pagination) == nil {
				var page, count int
				if page = pagination.Page; page == 0 {
					page = 1
				}
				if count = pagination.Count; count == 0 {
					count = 10
				}
				setting := c.MustGet("setting").(*db.Setting)
				totalCount := len(podcast.PodcastItems)
				totalPages := math.Ceil(float64(totalCount) / float64(count))
				nextPage, previousPage := 0, 0
				if float64(page) < totalPages {
					nextPage = page + 1
				}
				if page > 1 {
					previousPage = page - 1
				}

				from := (page - 1) * count
				to := page * count
				if to > totalCount {
					to = totalCount
				}
				c.HTML(http.StatusOK, "episodes.html", gin.H{
					"title":          podcast.Title,
					"podcastItems":   podcast.PodcastItems[from:to],
					"setting":        setting,
					"page":           page,
					"count":          count,
					"totalCount":     totalCount,
					"totalPages":     totalPages,
					"nextPage":       nextPage,
					"previousPage":   previousPage,
					"downloadedOnly": false,
				})
			} else {
				c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
			}
		} else {
			c.JSON(http.StatusBadRequest, err)
		}
	} else {
		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid request"})
	}

}

func getItemsToPlay(itemId, podcastId string) []db.PodcastItem {
	var items []db.PodcastItem
	if itemId != "" {
		toAdd := service.GetPodcastItemById(itemId)
		items = append(items, *toAdd)

	} else if podcastId != "" {
		pod := service.GetPodcastById(podcastId)
		for _, item := range pod.PodcastItems {
			if item.DownloadStatus == db.Downloaded {
				items = append(items, item)
			}
		}
	}
	return items
}

func PlayerPage(c *gin.Context) {

	itemId, hasItemId := c.GetQuery("itemId")
	podcastId, hasPodcastId := c.GetQuery("podcastId")
	title := "Podgrab"
	var items []db.PodcastItem
	var totalCount int64
	if hasItemId {
		toAdd := service.GetPodcastItemById(itemId)
		items = append(items, *toAdd)
		totalCount = 1
	} else if hasPodcastId {
		pod := service.GetPodcastById(podcastId)
		for _, item := range pod.PodcastItems {
			if item.DownloadStatus == db.Downloaded {
				items = append(items, item)
			}
		}
		title = "Playing: " + pod.Title
		totalCount = int64(len(items))
	} else {
		title = "Playing Latest Episodes"
		if err := db.GetPaginatedPodcastItems(1, 10, true, &items, &totalCount); err != nil {
			fmt.Println(err.Error())
		}
	}
	setting := c.MustGet("setting").(*db.Setting)

	c.HTML(http.StatusOK, "player.html", gin.H{
		"title":          title,
		"podcastItems":   items,
		"setting":        setting,
		"count":          len(items),
		"totalCount":     totalCount,
		"downloadedOnly": true,
	})

}
func SettingsPage(c *gin.Context) {

	setting := c.MustGet("setting").(*db.Setting)
	c.HTML(http.StatusOK, "settings.html", gin.H{
		"setting": setting,
		"title":   "Update your preferences",
	})

}
func BackupsPage(c *gin.Context) {

	files, err := service.GetAllBackupFiles()
	var allFiles []interface{}

	for _, file := range files {
		arr := strings.Split(file, string(os.PathSeparator))
		name := arr[len(arr)-1]
		subsplit := strings.Split(name, "_")
		dateStr := subsplit[2]
		date, err := time.Parse("2006.01.02", dateStr)
		if err == nil {
			toAdd := map[string]interface{}{
				"date": date,
				"name": name,
				"path": strings.ReplaceAll(file, string(os.PathSeparator), "/"),
			}
			allFiles = append(allFiles, toAdd)
		}
	}

	if err == nil {
		c.HTML(http.StatusOK, "backups.html", gin.H{
			"backups": allFiles,
			"title":   "Backups",
		})
	} else {
		c.JSON(http.StatusBadRequest, err)
	}

}
func AllEpisodesPage(c *gin.Context) {
	var pagination Pagination
	if c.ShouldBindQuery(&pagination) == nil {
		var page, count int
		if page = pagination.Page; page == 0 {
			page = 1
		}
		if count = pagination.Count; count == 0 {
			count = 10
		}
		var podcastItems []db.PodcastItem
		var totalCount int64
		if err := db.GetPaginatedPodcastItems(page, count, pagination.DownloadedOnly, &podcastItems, &totalCount); err == nil {
			setting := c.MustGet("setting").(*db.Setting)
			totalPages := math.Ceil(float64(totalCount) / float64(count))
			nextPage, previousPage := 0, 0
			if float64(page) < totalPages {
				nextPage = page + 1
			}
			if page > 1 {
				previousPage = page - 1
			}
			c.HTML(http.StatusOK, "episodes.html", gin.H{
				"title":          "All Episodes",
				"podcastItems":   podcastItems,
				"setting":        setting,
				"page":           page,
				"count":          count,
				"totalCount":     totalCount,
				"totalPages":     totalPages,
				"nextPage":       nextPage,
				"previousPage":   previousPage,
				"downloadedOnly": pagination.DownloadedOnly,
			})
		} else {
			c.JSON(http.StatusBadRequest, err)
		}
	} else {
		c.JSON(http.StatusBadRequest, gin.H{"message": "Invalid request"})
	}

}

func Search(c *gin.Context) {
	var searchQuery SearchGPodderData
	if c.ShouldBindQuery(&searchQuery) == nil {
		itunesService := new(service.ItunesService)
		data := itunesService.Query(searchQuery.Q)
		allPodcasts := service.GetAllPodcasts("")

		urls := make(map[string]string, len(*allPodcasts))
		for _, pod := range *allPodcasts {
			fmt.Println(pod.URL)
			urls[pod.URL] = pod.ID
		}
		for _, pod := range data {
			_, ok := urls[pod.URL]
			fmt.Println(pod.URL + " " + strconv.FormatBool(ok))
			pod.AlreadySaved = ok
		}
		c.JSON(200, data)
	}

}

func GetOmpl(c *gin.Context) {
	data, err := service.ExportOmpl()
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"message": "Invalid request"})
		return
	}
	c.Header("Content-Disposition", "attachment; filename=podgrab-export.opml")
	c.Data(200, "text/xml", data)
}
func UploadOpml(c *gin.Context) {
	file, _, err := c.Request.FormFile("file")
	defer file.Close()
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"message": "Invalid request"})
		return
	}

	buf := bytes.NewBuffer(nil)
	if _, err := io.Copy(buf, file); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"message": "Invalid request"})
		return
	}
	content := string(buf.Bytes())
	err = service.AddOpml(content)
	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"message": err.Error()})
	} else {
		c.JSON(200, gin.H{"success": "File uploaded"})
	}
}

func AddNewPodcast(c *gin.Context) {
	var addPodcastData AddPodcastData
	err := c.ShouldBind(&addPodcastData)

	if err == nil {

		_, err = service.AddPodcast(addPodcastData.Url)
		if err == nil {
			go service.RefreshEpisodes()
			c.Redirect(http.StatusFound, "/")

		} else {

			c.JSON(http.StatusBadRequest, err)

		}
	} else {
		//	fmt.Println(err.Error())
		c.JSON(http.StatusBadRequest, err)
	}

}