mdeditor/app/src/main/java/org/wntr/mdeditor/mdMeta.kt

package org.wntr.mdeditor

import android.util.Log
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory
import com.fasterxml.jackson.module.kotlin.KotlinModule
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.ResponseBody.Companion.toResponseBody

class mdMeta {
    var metaData = mutableMapOf<String,String>()
    var ID: String? = null
    var updatedAt: String? = null
    var cursor: String =  "{ line: 0, ch: 0, sticky: null }"
        get() =
            if (field.equals("null"))  "{ line: 0, ch: 0, sticky: null }"
            else field

    fun put(key: String, value: String) {
        metaData.put(key, value)
    }
    fun get(key: String): String?{
        return metaData.get(key)
    }

    override fun toString(): String {
        if (metaData.size == 0) return ""
        var metaString = "---\n"
        for (key in metaData.keys) {
            metaString += "$key: ${metaData.get(key as String)}\n"
        }
        metaString += "---\n"
        return metaString
    }


    fun extractMetadataFromMarkdown(markdown: String) : String {
        val charactersBetweenGroupedHyphens = Regex("^---([\\s\\S]*?)---\n")
        val metadataMatched = charactersBetweenGroupedHyphens.find(markdown)

        if (metadataMatched == null || metadataMatched.value == "---\n---\n") {
            Log.d(javaClass.simpleName,"No metadata included")
            metaData = mutableMapOf()
            ID = null
            return markdown
        }
        val metadata = metadataMatched.value

        val mapper = ObjectMapper(YAMLFactory())
        mapper.registerModule(KotlinModule())
        metaData = mapper.readValue(metadata, Map::class.java) as MutableMap<String,String>
        for (entry in metaData) {
            Log.d(javaClass.simpleName,"${entry.key}: ${entry.value}")
        }
        return markdown.substring(metadata.length)
    }

    fun getId(): String? {
        if (ID !== null)
            return ID as String
        if (metaData.get("url") == "") return null
        var response: retrofit2.Response<posts> = retrofit2.Response.error(
            444,
            "error".toResponseBody("text/plain".toMediaTypeOrNull())
        )
        try {
            response = MainActivity.api.postApi.getPosts().execute()
        }
        catch(e: Exception) {
            Log.d(javaClass.simpleName, "Couldn't get post list: $e")
        }

        Log.d(javaClass.simpleName, "result: ${response.code()}")
        if (response.isSuccessful) {
            val remoteDoc = response.body()!!.posts.find { it.url == metaData.get("url")}

            if (remoteDoc == null ){
                Log.d(javaClass.simpleName, "Could not find post ID ${metaData.get("url")}. Already deleted?")
                metaData.put("url", "")
                ID = null
                return ID
            }
            ID = remoteDoc.id
            updatedAt = remoteDoc.updated_at
            Log.d(javaClass.simpleName, "Document is online at ${
                metaData.get("url")}\nID: ${ID}")
            return ID
        } else {
            return null
        }
    }

}