/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package mozilla.components.lib.crash.ui

import android.content.Context
import android.content.Intent
import android.text.SpannableStringBuilder
import android.text.Spanned
import android.text.format.DateUtils
import android.text.method.LinkMovementMethod
import android.text.style.ClickableSpan
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.recyclerview.widget.RecyclerView
import mozilla.components.lib.crash.CrashReporter
import mozilla.components.lib.crash.R
import mozilla.components.lib.crash.db.CrashWithReports
import mozilla.components.lib.crash.db.ReportEntity

/**
 * RecyclerView adapter for displaying the list of crashes.
 */
internal class CrashListAdapter(
    private val crashReporter: CrashReporter,
    private val onSelection: (String) -> Unit
) : RecyclerView.Adapter<CrashViewHolder>() {
    private var crashes: List<CrashWithReports> = emptyList()

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CrashViewHolder {
        val view = LayoutInflater.from(
            parent.context
        ).inflate(
            R.layout.mozac_lib_crash_item_crash,
            parent,
            false
        )

        return CrashViewHolder(view)
    }

    override fun getItemCount(): Int {
        return crashes.size
    }

    override fun onBindViewHolder(holder: CrashViewHolder, position: Int) {
        val crashWithReports = crashes[position]

        holder.idView.text = crashWithReports.crash.uuid

        holder.titleView.text = crashWithReports.crash.stacktrace.lines().first()

        val time = DateUtils.getRelativeDateTimeString(
            holder.footerView.context,
            crashWithReports.crash.createdAt,
            DateUtils.MINUTE_IN_MILLIS,
            DateUtils.WEEK_IN_MILLIS,
            0
        )

        holder.footerView.text = SpannableStringBuilder(time).apply {
            append(" - ")

            append(holder.itemView.context.getString(R.string.mozac_lib_crash_share), object : ClickableSpan() {
                override fun onClick(widget: View) {
                    shareCrash(widget.context, crashWithReports)
                }
            }, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)

            if (crashWithReports.reports.isNotEmpty()) {
                append(" - ")
                append(crashReporter, crashWithReports.reports, onSelection)
            }
        }
    }

    fun updateList(list: List<CrashWithReports>) {
        crashes = list
        notifyDataSetChanged()
    }

    private fun shareCrash(context: Context, crashWithReports: CrashWithReports) {
        val text = StringBuilder()

        text.append(crashWithReports.crash.uuid)
        text.appendln()
        text.append(crashWithReports.crash.stacktrace.lines().first())
        text.appendln()

        crashWithReports.reports.forEach { report ->
            val service = crashReporter.getCrashReporterServiceById(report.serviceId)
            text.append(" * ")
            text.append(service?.name ?: report.serviceId)
            text.append(": ")
            text.append(service?.createCrashReportUrl(report.reportId) ?: "<No URL>")
            text.appendln()
        }

        text.append("----")
        text.appendln()
        text.append(crashWithReports.crash.stacktrace)
        text.appendln()

        val intent = Intent(Intent.ACTION_SEND)
        intent.type = "text/plain"
        intent.putExtra(Intent.EXTRA_TEXT, text.toString())
        context.startActivity(Intent.createChooser(intent, "Crash"))
    }
}

internal class CrashViewHolder(
    view: View
) : RecyclerView.ViewHolder(
    view
) {
    val titleView = view.findViewById<TextView>(R.id.mozac_lib_crash_title)
    val idView = view.findViewById<TextView>(R.id.mozac_lib_crash_id)
    val footerView = view.findViewById<TextView>(R.id.mozac_lib_crash_footer).apply {
        movementMethod = LinkMovementMethod.getInstance()
    }
}

private fun SpannableStringBuilder.append(
    crashReporter: CrashReporter,
    services: List<ReportEntity>,
    onSelection: (String) -> Unit
): SpannableStringBuilder {
    services.forEachIndexed { index, entity ->
        val service = crashReporter.getCrashReporterServiceById(entity.serviceId)
        val name = service?.name ?: entity.serviceId
        val url = service?.createCrashReportUrl(entity.reportId)

        if (url != null) {
            append(name, object : ClickableSpan() {
                override fun onClick(widget: View) {
                    onSelection(url)
                }
            }, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
        } else {
            append(name)
        }

        if (index < services.lastIndex) {
            append(" ")
        }
    }
    return this
}
