package io.oxygenhub.android.api

import kotlinx.serialization.SerialName

import kotlinx.serialization.Serializable

// The hub's JSON, by hand from oxygenhub's crates/hub-api/src/lib.rs (and

// the device flow's answers in crates/hub/src/api/device.rs). Field names

// are the hub's own, snake case; times are milliseconds since the epoch.

// Every field has a default, so an added or missing field never breaks the

// app: the hub's types may still change before 1.0.

/** `GET /api/v1/user`. */

@Serializable

data class User(

    val username: String,

    @SerialName("display_name") val displayName: String = "",

    @SerialName("is_admin") val isAdmin: Boolean = false,

    val keys: List<String> = emptyList(),

    @SerialName("created_ms") val createdMs: Long = 0,

) {

    /** The name to greet: the display name, or the username without one. */

    val shownName: String get() = displayName.ifBlank { username }

}

@Serializable

enum class Visibility {

    @SerialName("public") Public,

    @SerialName("internal") Internal,

    @SerialName("private") Private,

}

/** A repository as `GET /api/v1/repos` lists it. */

@Serializable

data class Repository(

    val owner: String,

    val name: String,

    val description: String = "",

    @SerialName("default_bookmark") val defaultBookmark: String = "main",

    val visibility: Visibility = Visibility.Public,

    @SerialName("created_ms") val createdMs: Long = 0,

    @SerialName("updated_ms") val updatedMs: Long = 0,

    @SerialName("clone_url") val cloneUrl: String = "",

) {

    val slug: String get() = "$owner/$name"

}

@Serializable

data class Label(

    val name: String,

    /** `#rrggbb`. */

    val colour: String = "",

    val description: String = "",

)

/** `GET /api/v1/repos/{owner}/{name}/issues`. */

@Serializable

data class Issue(

    val number: Long,

    val title: String,

    val body: String = "",

    val author: String = "",

    /** `open` or `closed`. */

    val state: String = "open",

    /** Why it closed: `completed`, `not_planned`, … (empty while open). */

    val reason: String = "",

    val labels: List<Label> = emptyList(),

    val assignees: List<String> = emptyList(),

    val milestone: String? = null,

    val comments: Long = 0,

    val locked: Boolean = false,

    val pinned: Boolean = false,

    @SerialName("created_ms") val createdMs: Long = 0,

    @SerialName("updated_ms") val updatedMs: Long = 0,

    @SerialName("closed_ms") val closedMs: Long? = null,

    val url: String = "",

) {

    val isOpen: Boolean get() = state == "open"

}

/** Which issues to list: the hub's `?state=`. */

enum class IssueState(val query: String) { Open("open"), Closed("closed"), All("all") }

/** One entry in the caller's inbox. */

@Serializable

data class Notification(

    val id: Long,

    @SerialName("at_ms") val atMs: Long = 0,

    /** `issue.opened`, `proposal.comment`, `mention`, `review`, … */

    val kind: String = "",

    val title: String = "",

    /** The page on the hub, absolute. */

    val url: String = "",

    val actor: String = "",

    val read: Boolean = false,

)

/** `GET /api/v1/notifications`: the unread count and the newest entries, unread first. */

@Serializable

data class Inbox(

    val unread: Long = 0,

    val items: List<Notification> = emptyList(),

)

/** An RFC 7807 problem: what the API answers with on an error. */

@Serializable

data class Problem(

    val status: Int = 0,

    val title: String = "",

    val detail: String = "",

)

/** The device flow's errors, RFC 8628's shape: `{"error": …, "error_description": …}`. */

@Serializable

data class OAuthError(

    val error: String = "",

    @SerialName("error_description") val description: String = "",

)

/** `POST /api/v1/device/code`'s answer. */

@Serializable

data class DeviceCode(

    @SerialName("device_code") val deviceCode: String,

    @SerialName("user_code") val userCode: String,

    @SerialName("verification_uri") val verificationUri: String,

    @SerialName("verification_uri_complete") val verificationUriComplete: String = "",

    @SerialName("expires_in") val expiresIn: Long = 900,

    val interval: Long = 5,

) {

    /** The page to open: with the code filled in when the hub offers it. */

    val pageToOpen: String get() = verificationUriComplete.ifBlank { verificationUri }

    // The device code is a secret until it is used: never in logs.

    override fun toString(): String = "DeviceCode(userCode=$userCode, verificationUri=$verificationUri)"

}

/** `POST /api/v1/device/token`'s answer once the user approved. */

@Serializable

data class TokenGrant(

    @SerialName("access_token") val accessToken: String,

    @SerialName("token_type") val tokenType: String = "bearer",

    /** The scopes the user allowed, space separated (they may untick some). */

    val scope: String = "",

    val username: String = "",

    @SerialName("expires_in") val expiresIn: Long = 0,

) {

    val scopes: List<String> get() = scope.split(' ').filter { it.isNotBlank() }

    override fun toString(): String = "TokenGrant(username=$username, scope=$scope, accessToken=<redacted>)"

}