package migration

import (
	"database/sql"
	"federated.computer/wp-sync-slowtwitch/services/slowtwitch"
	"federated.computer/wp-sync-slowtwitch/services/wordpress"
	"fmt"
	"slices"
	"strconv"
	"strings"
)

type MigratePosts struct {
	SlowtwitchDatabase *sql.DB
	ResultsDatabase    *sql.DB
	WordpressBaseUrl   string
	WordpressUser      string
	WordpressPassword  string
}

func (migration MigratePosts) Execute() {
	slowtwitchPostIds, err := slowtwitch.GetAllPostIds(migration.SlowtwitchDatabase)
	if err != nil {
		panic("Could not migrate posts: " + err.Error())
	}
	migratedPostIds, err := GetAllMigratedPostIds(migration.ResultsDatabase)
	if err != nil {
		panic("Could not migrate posts:" + err.Error())
	}

	//get wordpress tag data, there are only 3
	tags := []string{"swim", "bike", "run"}
	wpTagData, wpTagErr := wordpress.GetTags(tags, migration.WordpressBaseUrl, migration.WordpressUser, migration.WordpressPassword)
	if wpTagErr != nil {
		panic("Could not migrate posts due to tags not found:" + wpTagErr.Error())
	}

	slowtwitchPostIdsForMigration := getPostIdsThatNeedMigration(slowtwitchPostIds, migratedPostIds)

	for _, postId := range slowtwitchPostIdsForMigration {
		errorMessage := ""
		//migrate
		postBase, postBaseErr := slowtwitch.GetPostBase(postId, migration.SlowtwitchDatabase)
		if postBaseErr != nil {
			errorMessage = errorMessage + postBaseErr.Error()
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}

		createWordpressPost := wordpress.CreatePost{
			Title:   postBase.Title,
			Excerpt: postBase.Description,
			Status:  "publish",
		}

		if postBase.DatePublished.Valid {
			t := postBase.DatePublished.Time
			timeString := fmt.Sprintf("%d-%02d-%02dT%02d:%02d:%02d",
				t.Year(), t.Month(), t.Day(),
				t.Hour(), t.Minute(), t.Second())
			createWordpressPost.Date = timeString
		} else {
			errorMessage = errorMessage + "Invalid Date Published"
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}

		for _, tag := range wpTagData {
			if postBase.Bike == true && tag.Name == "bike" {
				createWordpressPost.Tags = append(createWordpressPost.Tags, tag.Id)
			}
			if postBase.Swim == true && tag.Name == "swim" {
				createWordpressPost.Tags = append(createWordpressPost.Tags, tag.Id)
			}
			if postBase.Run == true && tag.Name == "run" {
				createWordpressPost.Tags = append(createWordpressPost.Tags, tag.Id)
			}
		}

		var wordPressCategoryIds []int
		var firstCategoryResult CategoryResult
		for _, slowtwitchCategoryId := range postBase.CategoryIds {
			categoryResult, err := GetSlowtwitchCategoryResult(slowtwitchCategoryId, migration.ResultsDatabase)
			if err != nil {
				errorMessage = errorMessage + err.Error()
				createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
				continue
			}
			wordPressCategoryIds = append(wordPressCategoryIds, categoryResult.WordpressId)
			firstCategoryResult = categoryResult
		}
		createWordpressPost.Categories = wordPressCategoryIds
		//Get Author ID
		editor, findEditorErr := GetEditor(postBase.Author, migration.ResultsDatabase)

		if findEditorErr != nil {
			errorMessage = errorMessage + findEditorErr.Error()
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}
		createWordpressPost.Author = editor.WordpressId
		//Get old link
		oldLink := strings.ReplaceAll(firstCategoryResult.OldUrl, "index.html", "") + slowtwitch.ConvertPostTitleToPath(postBase.Title, postBase.Id)
		linkStatus := slowtwitch.GetPageStatus(oldLink)

		if linkStatus == 404 {
			errorMessage = errorMessage + "Page not found on Slowtwitch"
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}

		//Get page, parse out post data and images
		//Upload images to wordpress, swap out with new image urls
		//Submit
		imagePaths, html, retreiveHtmlErr := slowtwitch.GetImagesAndPostHtml(oldLink)
		if retreiveHtmlErr != nil {
			errorMessage = errorMessage + retreiveHtmlErr.Error()
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}
		//Create images from the image paths
		var imageResults []ImageResult

		for i, imagePath := range imagePaths {
			//construct URL
			imageUrl := "https://www.slowtwitch.com" + imagePath
			createWordpressImage := wordpress.CreateImage{
				Url: imageUrl,
			}
			//submit image
			wordpressImage, wordpressImageErr := createWordpressImage.Execute(migration.WordpressBaseUrl, migration.WordpressUser, migration.WordpressPassword)

			if wordpressImageErr != nil {
				errorMessage = errorMessage + wordpressImageErr.Error()
				createImageFailureResult(imageUrl, migration.ResultsDatabase)
				continue
			}
			//first photo is the featured photo
			if i == 0 {
				createWordpressPost.FeaturedMedia = wordpressImage.Id
			}
			//begin process of recording result
			imageResult := ImageResult{
				OldUrl:      imageUrl,
				NewUrl:      wordpressImage.Link,
				WordpressId: wordpressImage.Id,
				IsSuccess:   true,
			}
			imageResults = append(imageResults, imageResult)
			//replace old links with new in post html
			strings.ReplaceAll(html, imageUrl, wordpressImage.Link)
			//create redirect
			imageRedirect := wordpress.CreateRedirect{
				Title:      postBase.Title + "image-" + string((i + 1)),
				Url:        imagePath,
				MatchType:  "page",
				ActionType: "url",
				ActionCode: 301,
				GroupId:    1,
				ActionData: wordpress.ActionData{
					Url: "/" + wordpressImage.Slug,
				},
			}

			_, imageRedirectErr := imageRedirect.Execute(migration.WordpressBaseUrl, migration.WordpressUser, migration.WordpressPassword)

			if imageRedirectErr != nil {
				fmt.Println("Failed to create image redirect:", imageUrl, ":", imageRedirectErr.Error())
			}
		}

		createWordpressPost.Content = html
		post, createWordpressPostErr := createWordpressPost.Execute(migration.WordpressBaseUrl, migration.WordpressUser, migration.WordpressPassword)
		if createWordpressPostErr != nil {
			errorMessage = errorMessage + createWordpressPostErr.Error()
			createPostFailureResult(postId, errorMessage, migration.ResultsDatabase)
			continue
		}
		//set up post result here to create
		//truncate error message for db
		if len(errorMessage) > 1450 {
			errorMessage = errorMessage[:1450]
		}

		postResult := PostResult{
			SlowtwitchId: postId,
			WordpressId:  post.Id,
			OldUrl:       oldLink,
			OldUrlStatus: linkStatus,
			NewUrl:       post.Link,
			IsSuccess:    true,
			ErrorMessage: errorMessage,
		}

		postResultId, createPostResultErr := CreatePostResult(postResult, migration.ResultsDatabase)
		if createPostResultErr != nil {
			fmt.Println("Could not record post result for Slowtwitch post:" + strconv.Itoa(postId) + createPostResultErr.Error())
		}
		for _, imageResult := range imageResults {
			imageResult.PostId = postResultId
			createImageResultErr := CreateImageResult(imageResult, migration.ResultsDatabase)
			if createImageResultErr != nil {
				fmt.Println("Error recording image result")
			}
		}
		oldPath := strings.ReplaceAll(oldLink, "https://www.slowtwitch.com", "")
		postRedirect := wordpress.CreateRedirect{
			Title:      "Article Redirect" + postBase.Title,
			Url:        oldPath,
			MatchType:  "page",
			ActionType: "url",
			ActionCode: 301,
			GroupId:    1,
			ActionData: wordpress.ActionData{
				Url: "/" + strings.ReplaceAll(postResult.NewUrl, migration.WordpressBaseUrl, ""),
			},
		}
		_, postRedirectErr := postRedirect.Execute(migration.WordpressBaseUrl, migration.WordpressUser, migration.WordpressPassword)
		if postRedirectErr != nil {
			fmt.Println("Error creating redirect for", postId, ":"+postRedirectErr.Error())
		}
		fmt.Println("Successfully created post and result for", postId)
		// TODO Update advanced Custom Fields with images
		//Install ACF and create field
		/*
			"acf": {
				"post_images": [...ids]
			}
		*/
	}
	// TODO Update related posts (get from post results db) as second loop
	//Install ACF and create field
	/*
		"acf": {
			"related_posts": [...ids]
		}
	*/
}

func getPostIdsThatNeedMigration(slowtwitchPostIds, migratedPostIds []int) []int {
	var output []int

	for _, slowtwitchPostId := range slowtwitchPostIds {
		hasId := slices.Contains(migratedPostIds, slowtwitchPostId)
		if hasId == false {
			output = append(output, slowtwitchPostId)
		}
	}

	return output
}

func createPostFailureResult(slowtwitchId int, errorMessage string, migrationDb *sql.DB) {
	fmt.Println("Error creating post: ", slowtwitchId, ":", errorMessage)

	postResult := PostResult{
		SlowtwitchId: slowtwitchId,
		WordpressId:  0,
		OldUrl:       "",
		OldUrlStatus: 0,
		NewUrl:       "",
		IsSuccess:    false,
		ErrorMessage: errorMessage,
	}

	_, err := CreatePostResult(postResult, migrationDb)

	if err != nil {
		fmt.Println("Failed to create failure result: ", err)
	}
}

func createImageFailureResult(url string, resultsDatabase *sql.DB) {
	fmt.Println("Error creating image failure result: ", url)

	imageResult := ImageResult{
		OldUrl:      url,
		NewUrl:      "",
		WordpressId: 0,
		IsSuccess:   false,
	}

	err := CreateImageResult(imageResult, resultsDatabase)
	if err != nil {
		fmt.Println("Failed to create failure result: ", err)
	}
}