//
//  JellyfinClientLibraryTests.swift
//
//  Copyright 2026 Brendan Szymanski <hello@bscubed.dev>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//

import Foundation
import LuminateAPI
import LuminateCore
import Testing

@testable import LuminateServices

/// Covers the DTO-to-domain mapping that every browse surface depends on.
@Suite struct JellyfinClientLibraryTests {
    /// A movie DTO exercising the wrapped enum, image tag, and user data payloads.
    private var movieResult: Components.Schemas.BaseItemDtoQueryResult {
        Components.Schemas.BaseItemDtoQueryResult(
            items: [
                Components.Schemas.BaseItemDto(
                    name: "Arrival",
                    id: "i1",
                    overview: "Linguist meets heptapods.",
                    productionYear: 2016,
                    _type: .init(value1: .movie),
                    userData: .init(value1: Components.Schemas.UserItemDataDto(isFavorite: true, played: false)),
                    imageTags: .init(additionalProperties: ["Primary": "abc", "NotAnImageType": "zzz"]),
                    backdropImageTags: ["bd1"]
                )
            ],
            totalRecordCount: 1,
            startIndex: 0
        )
    }

    /// Builds a client wired to a double.
    ///
    /// - Parameter api: The stubbed API.
    /// - Returns: A client that routes every call to `api`.
    private func makeClient(_ api: MockJellyfinAPI) -> JellyfinClient {
        JellyfinClient(
            configuration: JellyfinClientConfiguration(serverURL: URL(string: "http://localhost")!),
            api: api
        )
    }

    @Test("Maps an item, dropping image tags the client cannot name")
    func mapsItems() async throws {
        var api = MockJellyfinAPI()
        api.getItemsOutput = .ok(.init(body: .json(movieResult)))
        let client = makeClient(api)

        let page = try await client.items()

        #expect(page.totalRecordCount == 1)
        let item = try #require(page.items.first)
        #expect(item.id == "i1")
        #expect(item.name == "Arrival")
        #expect(item.kind == .movie)
        #expect(item.productionYear == 2016)
        #expect(item.imageTags == [.primary: "abc"])
        #expect(item.backdropImageTags == ["bd1"])
        #expect(item.userData?.isFavorite == true)
        #expect(item.userData?.played == false)
    }

    @Test("Every JSON profile the server may negotiate decodes identically")
    func jsonProfilesCollapse() async throws {
        var camelCase = MockJellyfinAPI()
        camelCase.getItemsOutput = .ok(.init(body: .applicationJsonProfile_Quot_camelcase_quot_(movieResult)))
        var pascalCase = MockJellyfinAPI()
        pascalCase.getItemsOutput = .ok(.init(body: .applicationJsonProfile_Quot_pascalcase_quot_(movieResult)))

        let fromCamelCase = try await makeClient(camelCase).items()
        let fromPascalCase = try await makeClient(pascalCase).items()

        #expect(fromCamelCase == fromPascalCase)
        #expect(fromCamelCase.items.first?.kind == .movie)
    }

    @Test("Maps libraries and drops unsupported collection types")
    func mapsLibraries() async throws {
        var api = MockJellyfinAPI()
        api.getUserViewsOutput = .ok(
            .init(
                body: .json(
                    Components.Schemas.BaseItemDtoQueryResult(
                        items: [
                            Components.Schemas.BaseItemDto(
                                name: "Shows",
                                id: "l1",
                                childCount: 12,
                                collectionType: .init(value1: .tvshows),
                                imageTags: .init(additionalProperties: ["Primary": "tag1"])
                            ),
                            Components.Schemas.BaseItemDto(
                                name: "Music",
                                id: "l2",
                                collectionType: .init(value1: .music)
                            ),
                        ]
                    )
                )
            )
        )
        let client = makeClient(api)

        let libraries = try await client.libraries()

        #expect(libraries.count == 2)
        #expect(libraries[0].collectionType == .tvShows)
        #expect(libraries[0].primaryImageTag == "tag1")
        #expect(libraries[0].childCount == 12)
        #expect(libraries[1].collectionType == nil)
    }

    @Test("A blank search term is rejected before any request is sent")
    func blankSearchTermRejected() async {
        let client = makeClient(MockJellyfinAPI())

        await #expect(throws: JellyfinClientError.invalidArgument(name: "term")) {
            _ = try await client.searchHints(term: "   ")
        }
    }

    @Test("An empty series identifier is rejected before any request is sent")
    func emptySeriesIdentifierRejected() async {
        let client = makeClient(MockJellyfinAPI())

        await #expect(throws: JellyfinClientError.invalidArgument(name: "seriesID")) {
            _ = try await client.seasons(seriesID: "")
        }
    }
}