package io.oxygenhub.android

import io.oxygenhub.android.api.FileChange

import io.oxygenhub.android.api.Avatar

import io.oxygenhub.android.api.HubException

import io.oxygenhub.android.api.Check

import io.oxygenhub.android.api.Proposal

import io.oxygenhub.android.api.ProposalState

import io.oxygenhub.android.api.HubApi

import io.oxygenhub.android.api.Inbox

import io.oxygenhub.android.api.Issue

import io.oxygenhub.android.api.IssueState

import io.oxygenhub.android.api.Repository

import io.oxygenhub.android.api.User

/** A hub in memory: answers from the fixtures, or the failure set for a call. */

class FakeHubApi : HubApi {

    var user: () -> User = { Fixtures.user }

    var repositories: () -> List<Repository> = { Fixtures.repos }

    var issues: (IssueState) -> List<Issue> = { state ->

        Fixtures.issues.filter { state == IssueState.All || it.state == state.query }

    }

    var inbox: () -> Inbox = { Fixtures.inbox }

    var markRead: (Long) -> Unit = {}

    var markAllRead: () -> Unit = {}

    var revoke: () -> Unit = {}

    var avatar: (String) -> Avatar? = { null }

    var proposals: (ProposalState) -> List<Proposal> = { state ->

        Fixtures.proposals.filter {

            when (state) {

                ProposalState.Open -> it.isOpen

                ProposalState.All -> true

                else -> it.state == state.query

            }

        }

    }

    var proposal: (Long) -> Proposal = { n -> Fixtures.proposals.first { it.number == n } }

    var checks: (Long) -> List<Check> = { Fixtures.checks }

    var land: (Long) -> Proposal = { n -> proposal(n).copy(state = "landed", landed = io.oxygenhub.android.api.Landed("andymccall", "api (token phone)", 1)) }

    var userProposals: () -> io.oxygenhub.android.api.UserProposals = {

        io.oxygenhub.android.api.UserProposals(

            review = listOf(io.oxygenhub.android.api.ProposalBrief("andymccall/oxygenhub", 300, "Show a column's archived cards", "ada")),

        )

    }

    var userIssues: () -> List<io.oxygenhub.android.api.IssueBrief> = {

        listOf(io.oxygenhub.android.api.IssueBrief("andymccall/oxygenhub", 359, "GET /user/issues"))

    }

    var autoLand: (Long, Boolean) -> Proposal = { n, on -> proposal(n).copy(autoLand = if (on) "andymccall" else null) }

    val calls = mutableListOf<String>()

    override suspend fun user(): User = user.invoke().also { calls += "user" }

    override suspend fun repositories(): List<Repository> = repositories.invoke().also { calls += "repos" }

    override suspend fun issues(owner: String, name: String, state: IssueState): List<Issue> =

        issues.invoke(state).also { calls += "issues $owner/$name ${state.query}" }

    override suspend fun inbox(limit: Int): Inbox = inbox.invoke().also { calls += "inbox" }

    override suspend fun registerPush(fcmToken: String, publicKey: String): Boolean = true.also { calls += "push" }

    override suspend fun review(owner: String, name: String, number: Long, verdict: String, body: String) {

        calls += "review $verdict $body"

    }

    var proposalDiff: () -> List<FileChange> = { emptyList() }

    override suspend fun proposalDiff(owner: String, name: String, number: Long): List<FileChange> =

        proposalDiff.invoke().also { calls += "proposalDiff" }

    override suspend fun markRead(id: Long) {

        calls += "read $id"

        markRead.invoke(id)

    }

    override suspend fun markAllRead() {

        calls += "read all"

        markAllRead.invoke()

    }

    var runnerToken: () -> io.oxygenhub.android.api.RunnerToken = { io.oxygenhub.android.api.RunnerToken("flowreg_test", "andymccall") }

    override suspend fun runnerToken() = runnerToken.invoke().also { calls += "runner token" }

    var releaseList: List<io.oxygenhub.android.api.Release> = emptyList()

    override suspend fun releases(owner: String, name: String) = releaseList.also { calls += "releases" }

    var hits: (String) -> List<io.oxygenhub.android.api.SearchHit> = { emptyList() }

    override suspend fun search(query: String) = hits(query).also { calls += "search $query" }

    var runList: List<io.oxygenhub.android.api.FlowRun> = emptyList()

    override suspend fun runs(owner: String, name: String) = runList.also { calls += "runs" }

    val runStore = mutableMapOf<Long, io.oxygenhub.android.api.FlowRun>()

    override suspend fun run(owner: String, name: String, number: Long) = runStore.getValue(number).also { calls += "run $number" }

    val logs = mutableMapOf<String, MutableList<io.oxygenhub.android.api.LogLine>>()

    override suspend fun jobLog(owner: String, name: String, number: Long, job: String, after: Long) =

        logs[job].orEmpty().filter { it.seq > after }.also { calls += "log $job after $after" }

    override suspend fun rerunRun(owner: String, name: String, number: Long) {

        calls += "rerun $number"

    }

    override suspend fun rerunJob(owner: String, name: String, number: Long, job: String) {

        calls += "rerun $number $job"

    }

    override suspend fun decideJob(owner: String, name: String, number: Long, job: String, approve: Boolean) {

        calls += "${if (approve) "approve" else "reject"} $number $job"

    }

    override suspend fun expediteRun(owner: String, name: String, number: Long, reason: String) {

        calls += "expedite $number $reason"

    }

    override suspend fun cancelRun(owner: String, name: String, number: Long) {

        calls += "cancel $number"

        runStore[number]?.let { runStore[number] = it.copy(status = "cancelled") }

    }

    var projectsOf: (String) -> List<io.oxygenhub.android.api.Project> = { emptyList() }

    override suspend fun projects(owner: String) = projectsOf(owner).also { calls += "projects $owner" }

    var boards = mutableMapOf<Long, io.oxygenhub.android.api.Board>()

    override suspend fun board(owner: String, number: Long) = boards.getValue(number).also { calls += "board $owner/$number" }

    override suspend fun moveCard(owner: String, number: Long, card: Long, column: String) {

        calls += "move $card $column"

        val b = boards.getValue(number)

        val moving = b.columns.flatMap { it.cards }.first { it.id == card }

        boards[number] = b.copy(columns = b.columns.map { c ->

            val rest = c.cards.filter { it.id != card }

            if (c.name == column) c.copy(cards = rest + moving) else c.copy(cards = rest)

        })

    }

    val issueStore = mutableMapOf<Long, io.oxygenhub.android.api.Issue>()

    val commentStore = mutableMapOf<Long, MutableList<io.oxygenhub.android.api.Comment>>()

    var repoLabels = listOf(io.oxygenhub.android.api.Label("bug", "#c62d47"), io.oxygenhub.android.api.Label("ui", "#0969da"))

    override suspend fun issue(owner: String, name: String, number: Long) =

        (issueStore[number] ?: throw io.oxygenhub.android.api.HubException.Http(404, "no such issue")).also { calls += "issue $number" }

    override suspend fun issueComments(owner: String, name: String, number: Long) = commentStore[number].orEmpty().toList()

    override suspend fun comment(owner: String, name: String, number: Long, body: String): io.oxygenhub.android.api.Comment {

        calls += "comment $number"

        val c = io.oxygenhub.android.api.Comment(id = (commentStore.values.sumOf { it.size } + 1).toLong(), author = "andymccall", body = body)

        commentStore.getOrPut(number) { mutableListOf() } += c

        issueStore[number]?.let { issueStore[number] = it.copy(comments = it.comments + 1) }

        return c

    }

    override suspend fun setIssueState(owner: String, name: String, number: Long, open: Boolean, reason: String): io.oxygenhub.android.api.Issue {

        calls += "state $number ${if (open) "open" else "closed:$reason"}"

        val i = issueStore.getValue(number).copy(state = if (open) "open" else "closed", reason = if (open) "" else reason)

        issueStore[number] = i

        return i

    }

    override suspend fun createIssue(owner: String, name: String, title: String, body: String): io.oxygenhub.android.api.Issue {

        val n = (issueStore.keys.maxOrNull() ?: 0) + 1

        val i = io.oxygenhub.android.api.Issue(n, title, body, author = "andymccall")

        issueStore[n] = i

        calls += "create $title"

        return i

    }

    override suspend fun labels(owner: String, name: String) = repoLabels

    override suspend fun setIssueLabels(owner: String, name: String, number: Long, labels: List<String>): io.oxygenhub.android.api.Issue {

        val i = issueStore.getValue(number).copy(labels = repoLabels.filter { it.name in labels })

        issueStore[number] = i

        return i

    }

    override suspend fun setIssueAssignees(owner: String, name: String, number: Long, assignees: List<String>): io.oxygenhub.android.api.Issue {

        val i = issueStore.getValue(number).copy(assignees = assignees)

        issueStore[number] = i

        calls += "assign $number ${assignees.joinToString(",")}"

        return i

    }

    var repository: io.oxygenhub.android.api.Repository = io.oxygenhub.android.api.Repository("andymccall", "demo", defaultBookmark = "main")

    override suspend fun repository(owner: String, name: String) = repository.also { calls += "repository" }

    var tree: (String, String) -> List<io.oxygenhub.android.api.TreeEntry> = { _, _ -> emptyList() }

    override suspend fun tree(owner: String, name: String, ref: String, path: String) =

        tree.invoke(ref, path).also { calls += "tree $ref:$path" }

    var files: Map<String, String> = emptyMap()

    override suspend fun file(owner: String, name: String, ref: String, path: String): String {

        calls += "file $ref:$path"

        return files[path] ?: throw io.oxygenhub.android.api.HubException.Http(404, "no such file")

    }

    var history: io.oxygenhub.android.api.History = io.oxygenhub.android.api.History()

    override suspend fun history(owner: String, name: String, ref: String, path: String?, offset: Int, limit: Int) =

        history.also { calls += "history $ref:${path.orEmpty()}" }

    var change: (String) -> io.oxygenhub.android.api.ChangeDetail = { error("no change") }

    override suspend fun change(owner: String, name: String, hash: String) = change.invoke(hash).also { calls += "change $hash" }

    var refs: Pair<List<String>, List<String>> = listOf("main") to emptyList()

    override suspend fun refs(owner: String, name: String) = refs.also { calls += "refs" }

    var userSky: () -> io.oxygenhub.android.api.UserSky = {

        io.oxygenhub.android.api.UserSky(now = 10 * 86_400_000L, repos = listOf("andymccall/oxygen"), events = listOf(listOf(0L, 0L, 9 * 86_400_000L, 3L)))

    }

    override suspend fun userSky() = userSky.invoke().also { calls += "user sky" }

    var userOrgs: () -> List<io.oxygenhub.android.api.UserOrg> = { listOf(io.oxygenhub.android.api.UserOrg("doomsdayone", role = "owner")) }

    override suspend fun userOrgs() = userOrgs.invoke().also { calls += "user orgs" }

    var createRepository: (String, String, String, io.oxygenhub.android.api.Visibility) -> Repository = { o, n, d, v ->

        Repository(owner = o, name = n, description = d, visibility = v)

    }

    override suspend fun createRepository(owner: String, name: String, description: String, visibility: io.oxygenhub.android.api.Visibility) =

        createRepository.invoke(owner, name, description, visibility).also { calls += "create $owner/$name" }

    var starterAssistants: (String) -> List<io.oxygenhub.android.api.StarterAssistant> = { emptyList() }

    override suspend fun starterAssistants(owner: String) = starterAssistants.invoke(owner).also { calls += "starter assistants $owner" }

    var startStarter: (String) -> io.oxygenhub.android.api.StarterStatus = { io.oxygenhub.android.api.StarterStatus("running") }

    override suspend fun startStarter(owner: String, name: String, description: String) =

        startStarter.invoke(description).also { calls += "start starter $owner/$name" }

    /** Each call answers the next status in the list (the last one repeats). */

    var starterStatuses: MutableList<io.oxygenhub.android.api.StarterStatus> = mutableListOf()

    override suspend fun starterStatus(owner: String, name: String): io.oxygenhub.android.api.StarterStatus {

        calls += "starter status $owner/$name"

        return if (starterStatuses.size > 1) starterStatuses.removeAt(0) else starterStatuses.firstOrNull() ?: io.oxygenhub.android.api.StarterStatus()

    }

    var userFlowRuns: () -> List<io.oxygenhub.android.api.UserFlowRun> = { emptyList() }

    override suspend fun userFlowRuns(before: Long?) = userFlowRuns.invoke().also { calls += "user flow runs" }

    override suspend fun repoSky(owner: String, name: String) =

        userSky.invoke().copy(repos = listOf("$owner/$name")).also { calls += "sky $owner/$name" }

    override suspend fun userIssues() = userIssues.invoke().also { calls += "user issues" }

    override suspend fun userProposals(landable: Boolean) =

        userProposals.invoke().also { calls += if (landable) "user proposals, landable" else "user proposals" }

    override suspend fun proposals(owner: String, name: String, state: ProposalState): List<Proposal> =

        proposals.invoke(state).also { calls += "proposals $owner/$name ${state.query}" }

    override suspend fun proposal(owner: String, name: String, number: Long): Proposal =

        proposal.invoke(number).also { calls += "proposal $number" }

    override suspend fun checks(owner: String, name: String, number: Long): List<Check> =

        checks.invoke(number).also { calls += "checks $number" }

    override suspend fun land(owner: String, name: String, number: Long): Proposal {

        calls += "land $number"

        return land.invoke(number)

    }

    override suspend fun setAutoLand(owner: String, name: String, number: Long, on: Boolean): Proposal {

        calls += "auto-land $number $on"

        return autoLand.invoke(number, on)

    }

    override suspend fun avatar(name: String): Avatar? = avatar.invoke(name).also { calls += "avatar $name" }

    var accounts: Map<String, io.oxygenhub.android.api.User> = emptyMap()

    var orgs: Map<String, io.oxygenhub.android.api.Organisation> = emptyMap()

    override suspend fun account(name: String) =

        (accounts[name] ?: throw HubException.Http(404, "no such account")).also { calls += "account $name" }

    override suspend fun organisation(name: String) =

        (orgs[name] ?: throw HubException.Http(404, "no such organisation")).also { calls += "org $name" }

    override suspend fun revokeToken() {

        calls += "revoke"

        revoke.invoke()

    }

}