/* 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.service

import android.content.Context
import android.net.Uri
import androidx.annotation.VisibleForTesting
import androidx.annotation.VisibleForTesting.PRIVATE
import io.sentry.SentryClient
import io.sentry.SentryClientFactory
import io.sentry.android.AndroidSentryClientFactory
import io.sentry.event.Breadcrumb
import io.sentry.event.BreadcrumbBuilder
import io.sentry.event.Event
import io.sentry.event.EventBuilder
import io.sentry.event.interfaces.ExceptionInterface
import mozilla.components.Build
import mozilla.components.lib.crash.Crash
import java.util.Date
import java.util.Locale
import mozilla.components.concept.base.crash.Breadcrumb as CrashBreadcrumb

/**
 * A [CrashReporterService] implementation that uploads crash reports to a Sentry server.
 *
 * This implementation will add default tags to every sent crash report (like the used Android Components version)
 * prefixed with "ac.".
 *
 * @param context The application [Context].
 * @param dsn Data Source Name of the Sentry server.
 * @param tags A list of additional tags that will be sent together with crash reports.
 * @param environment An optional, environment name string or null to set none
 * @param sentryProjectUrl Base URL of the Sentry web interface pointing to the app/project.
 */
class SentryService(
    context: Context,
    dsn: String,
    tags: Map<String, String> = emptyMap(),
    environment: String? = null,
    private val sendEventForNativeCrashes: Boolean = false,
    private val sentryProjectUrl: String? = null,
    clientFactory: SentryClientFactory? = null
) : CrashReporterService {
    override val id: String = "sentry"

    override val name: String = "Sentry"

    override fun createCrashReportUrl(identifier: String): String? {
        return sentryProjectUrl?.let {
            val id = identifier.replace("-", "")
            return "$it/?query=$id"
        }
    }

    // Fenix perf note: Sentry init may negatively impact cold startup so it's important this is lazily init.
    @VisibleForTesting(otherwise = PRIVATE)
    internal val client: SentryClient by lazy { SentryClientFactory.sentryClient(
            Uri.parse(dsn).buildUpon()
                .appendQueryParameter("uncaught.handler.enabled", "false")
                .build()
                .toString(),

            // Fenix perf note: we initialize Android...Factory inside the lazy block to avoid
            // calling the slow Logger.getLogger call on cold startup #7441
            clientFactory ?: AndroidSentryClientFactory(context)
        ).apply {
            this.environment = environment
            tags.forEach { entry ->
                addTag(entry.key, entry.value)
            }

            // Add default tags
            addTag("ac.version", Build.version)
            addTag("ac.git", Build.gitHash)
            addTag("ac.as.build_version", Build.applicationServicesVersion)
            addTag("ac.glean.build_version", Build.gleanSdkVersion)
            addTag("user.locale", Locale.getDefault().toString())
        }
    }

    override fun report(crash: Crash.UncaughtExceptionCrash): String? {
        crash.breadcrumbs.forEach {
            client.context.recordBreadcrumb(it.toSentryBreadcrumb())
        }

        val eventBuilder = EventBuilder().withMessage(createMessage(crash))
                .withTimestamp(Date(crash.timestamp))
                .withLevel(Event.Level.FATAL)
                .withSentryInterface(ExceptionInterface(crash.throwable))

        client.sendEvent(eventBuilder)
        client.context.clearBreadcrumbs()

        return eventBuilder.event.id.toString()
    }

    override fun report(crash: Crash.NativeCodeCrash): String? {
        if (sendEventForNativeCrashes) {
            val level = when (crash.isFatal) {
                true -> Event.Level.FATAL
                else -> Event.Level.ERROR
            }

            crash.breadcrumbs.forEach {
                client.context.recordBreadcrumb(it.toSentryBreadcrumb())
            }

            val eventBuilder = EventBuilder()
                .withTimestamp(Date(crash.timestamp))
                .withMessage(createMessage(crash))
                .withLevel(level)

            client.sendEvent(eventBuilder)
            client.context.clearBreadcrumbs()

            return eventBuilder.event.id.toString()
        }

        return null
    }

    override fun report(throwable: Throwable, breadcrumbs: ArrayList<CrashBreadcrumb>): String? {
        breadcrumbs.forEach {
            client.context.recordBreadcrumb(it.toSentryBreadcrumb())
        }

        val eventBuilder = EventBuilder().withMessage(createMessage(throwable))
                .withLevel(Event.Level.INFO)
                .withSentryInterface(ExceptionInterface(throwable))

        client.sendEvent(eventBuilder)
        client.context.clearBreadcrumbs()

        return eventBuilder.event.id.toString()
    }

    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
    internal fun CrashBreadcrumb.toSentryBreadcrumb(): Breadcrumb {
        return BreadcrumbBuilder()
                .setMessage(this.message)
                .setData(this.data)
                .setCategory(this.category)
                .setLevel(this.level.toSentryBreadcrumbLevel())
                .setType(this.type.toSentryBreadcrumbType())
                .setTimestamp(this.date)
                .build()
    }

    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
    internal fun CrashBreadcrumb.Level.toSentryBreadcrumbLevel() = when (this) {
        CrashBreadcrumb.Level.CRITICAL -> Breadcrumb.Level.CRITICAL
        CrashBreadcrumb.Level.ERROR -> Breadcrumb.Level.ERROR
        CrashBreadcrumb.Level.WARNING -> Breadcrumb.Level.WARNING
        CrashBreadcrumb.Level.INFO -> Breadcrumb.Level.INFO
        CrashBreadcrumb.Level.DEBUG -> Breadcrumb.Level.DEBUG
    }

    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
    internal fun CrashBreadcrumb.Type.toSentryBreadcrumbType() = when (this) {
        CrashBreadcrumb.Type.DEFAULT -> Breadcrumb.Type.DEFAULT
        CrashBreadcrumb.Type.HTTP -> Breadcrumb.Type.HTTP
        CrashBreadcrumb.Type.NAVIGATION -> Breadcrumb.Type.NAVIGATION
        CrashBreadcrumb.Type.USER -> Breadcrumb.Type.USER
    }
}

private fun createMessage(crash: Crash.NativeCodeCrash): String {
    val fatal = crash.isFatal.toString()
    val minidumpSuccess = crash.minidumpSuccess

    return "NativeCodeCrash(fatal=$fatal, minidumpSuccess=$minidumpSuccess)"
}

private fun createMessage(crash: Crash.UncaughtExceptionCrash): String {
    return crash.throwable.message ?: ""
}

private fun createMessage(throwable: Throwable): String {
    return "$INFO_PREFIX ${throwable.message}"
}
