import Foundation

public enum ProviderTokenSource: String, Sendable {
    case environment
    case authFile
}

public struct ProviderTokenResolution: Sendable {
    public let token: String
    public let source: ProviderTokenSource

    public init(token: String, source: ProviderTokenSource) {
        self.token = token
        self.source = source
    }
}

public enum ProviderTokenResolver {
    public static func ampToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.ampResolution(environment: environment)?.token
    }

    public static func zaiToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.zaiResolution(environment: environment)?.token
    }

    public static func syntheticToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.syntheticResolution(environment: environment)?.token
    }

    public static func openAIAPIToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.openAIAPIResolution(environment: environment)?.token
    }

    public static func azureOpenAIToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.azureOpenAIResolution(environment: environment)?.token
    }

    public static func claudeAdminAPIToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.claudeAdminAPIResolution(environment: environment)?.token
    }

    public static func copilotToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.copilotResolution(environment: environment)?.token
    }

    public static func minimaxToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.minimaxTokenResolution(environment: environment)?.token
    }

    public static func alibabaToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.alibabaTokenResolution(environment: environment)?.token
    }

    public static func minimaxCookie(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.minimaxCookieResolution(environment: environment)?.token
    }

    public static func kimiAuthToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.kimiAuthResolution(environment: environment)?.token
    }

    public static func kimiAPIToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.kimiAPIResolution(environment: environment)?.token
    }

    public static func kimiK2Token(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.kimiK2Resolution(environment: environment)?.token
    }

    public static func moonshotToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.moonshotResolution(environment: environment)?.token
    }

    public static func ollamaToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.ollamaResolution(environment: environment)?.token
    }

    public static func kiloToken(
        environment: [String: String] = ProcessInfo.processInfo.environment,
        authFileURL: URL? = nil) -> String?
    {
        self.kiloResolution(environment: environment, authFileURL: authFileURL)?.token
    }

    public static func warpToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.warpResolution(environment: environment)?.token
    }

    public static func openRouterToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.openRouterResolution(environment: environment)?.token
    }

    public static func crossModelToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.crossModelResolution(environment: environment)?.token
    }

    public static func elevenLabsToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.elevenLabsResolution(environment: environment)?.token
    }

    public static func groqToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.groqResolution(environment: environment)?.token
    }

    public static func llmProxyToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.llmProxyResolution(environment: environment)?.token
    }

    public static func liteLLMToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.liteLLMResolution(environment: environment)?.token
    }

    public static func clawRouterToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.clawRouterResolution(environment: environment)?.token
    }

    public static func perplexitySessionToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.perplexityResolution(environment: environment)?.token
    }

    public static func deepseekToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.deepseekResolution(environment: environment)?.token
    }

    public static func poeToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.poeResolution(environment: environment)?.token
    }

    public static func crofToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.crofResolution(environment: environment)?.token
    }

    public static func veniceToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.veniceResolution(environment: environment)?.token
    }

    public static func stepfunToken(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.stepfunResolution(environment: environment)?.token
    }

    public static func doubaoToken(environment: [String: String] = ProcessInfo.processInfo.environment) -> String? {
        self.doubaoResolution(environment: environment)?.token
    }

    public static func bedrockAccessKeyID(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        self.bedrockResolution(environment: environment)?.token
    }

    public static func bedrockResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(BedrockSettingsReader.accessKeyID(environment: environment))
    }

    public static func ampResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(AmpSettingsReader.apiToken(environment: environment))
    }

    public static func deepseekResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(DeepSeekSettingsReader.apiKey(environment: environment))
    }

    public static func poeResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(PoeSettingsReader.apiKey(environment: environment))
    }

    public static func crofResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(CrofSettingsReader.apiKey(environment: environment))
    }

    public static func veniceResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(VeniceSettingsReader.apiKey(environment: environment))
    }

    public static func codebuffToken(
        environment: [String: String] = ProcessInfo.processInfo.environment,
        authFileURL: URL? = nil) -> String?
    {
        self.codebuffResolution(environment: environment, authFileURL: authFileURL)?.token
    }

    public static func stepfunResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(StepFunSettingsReader.token(environment: environment))
    }

    public static func doubaoResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(DoubaoSettingsReader.apiKey(environment: environment))
    }

    public static func zaiResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(ZaiSettingsReader.apiToken(environment: environment))
    }

    public static func syntheticResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(SyntheticSettingsReader.apiKey(environment: environment))
    }

    public static func openAIAPIResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(OpenAIAPISettingsReader.apiKey(environment: environment))
    }

    public static func azureOpenAIResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(AzureOpenAISettingsReader.apiKey(environment: environment))
    }

    public static func claudeAdminAPIResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(ClaudeAdminAPISettingsReader.apiKey(environment: environment))
    }

    public static func copilotResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(self.cleaned(environment["COPILOT_API_TOKEN"]))
    }

    public static func minimaxTokenResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(MiniMaxAPISettingsReader.apiToken(environment: environment))
    }

    public static func alibabaTokenResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(AlibabaCodingPlanSettingsReader.apiToken(environment: environment))
    }

    public static func minimaxCookieResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(MiniMaxSettingsReader.cookieHeader(environment: environment))
    }

    public static func kimiAuthResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        if let resolution = self.resolveEnv(KimiSettingsReader.authToken(environment: environment)) {
            return resolution
        }
        #if os(macOS)
        do {
            let session = try KimiCookieImporter.importSession()
            if let token = session.authToken {
                return ProviderTokenResolution(token: token, source: .environment)
            }
        } catch {
            // No browser cookies found, continue to fallback
        }
        #endif
        return nil
    }

    public static func kimiAPIResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(KimiSettingsReader.apiKey(environment: environment))
    }

    public static func kimiK2Resolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(KimiK2SettingsReader.apiKey(environment: environment))
    }

    public static func moonshotResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(MoonshotSettingsReader.apiKey(environment: environment))
    }

    public static func ollamaResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(OllamaAPISettingsReader.apiKey(environment: environment))
    }

    public static func kiloResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment,
        authFileURL: URL? = nil) -> ProviderTokenResolution?
    {
        if let resolution = self.resolveEnv(KiloSettingsReader.apiKey(environment: environment)) {
            return resolution
        }
        if let token = KiloSettingsReader.authToken(authFileURL: authFileURL) {
            return ProviderTokenResolution(token: token, source: .authFile)
        }
        return nil
    }

    public static func warpResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(WarpSettingsReader.apiKey(environment: environment))
    }

    public static func openRouterResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(OpenRouterSettingsReader.apiToken(environment: environment))
    }

    public static func crossModelResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(CrossModelSettingsReader.apiToken(environment: environment))
    }

    public static func elevenLabsResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(ElevenLabsSettingsReader.apiKey(environment: environment))
    }

    public static func groqResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(GroqSettingsReader.apiKey(environment: environment))
    }

    public static func llmProxyResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(LLMProxySettingsReader.apiKey(environment: environment))
    }

    public static func liteLLMResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(LiteLLMSettingsReader.apiKey(environment: environment))
    }

    public static func clawRouterResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        self.resolveEnv(ClawRouterSettingsReader.apiKey(environment: environment))
    }

    public enum DeepgramCredentialKind: Sendable {
        case apiKey
        case projectID
    }

    public static func deepgramResolution(
        type: DeepgramCredentialKind,
        environment: [String: String] = ProcessInfo.processInfo.environment) -> String?
    {
        switch type {
        case .apiKey:
            self.resolveEnv(DeepgramSettingsReader.apiKey(environment: environment))?.token

        case .projectID:
            self.resolveEnv(DeepgramSettingsReader.projectID(environment: environment))?.token
        }
    }

    public static func codebuffResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment,
        authFileURL: URL? = nil) -> ProviderTokenResolution?
    {
        if let resolution = self.resolveEnv(CodebuffSettingsReader.apiKey(environment: environment)) {
            return resolution
        }
        if let token = CodebuffSettingsReader.authToken(authFileURL: authFileURL) {
            return ProviderTokenResolution(token: token, source: .authFile)
        }
        return nil
    }

    public static func perplexityResolution(
        environment: [String: String] = ProcessInfo.processInfo.environment) -> ProviderTokenResolution?
    {
        if let resolution = self.resolveEnv(PerplexitySettingsReader.sessionToken(environment: environment)) {
            return resolution
        }
        #if os(macOS)
        do {
            let session = try PerplexityCookieImporter.importSession()
            if let token = session.sessionToken {
                return ProviderTokenResolution(token: token, source: .environment)
            }
        } catch {
            // No browser cookies found, continue to fallback
        }
        #endif
        return nil
    }

    private static func cleaned(_ raw: String?) -> String? {
        guard var value = raw?.trimmingCharacters(in: .whitespacesAndNewlines), !value.isEmpty else {
            return nil
        }

        if (value.hasPrefix("\"") && value.hasSuffix("\"")) ||
            (value.hasPrefix("'") && value.hasSuffix("'"))
        {
            value = String(value.dropFirst().dropLast())
        }

        value = value.trimmingCharacters(in: .whitespacesAndNewlines)
        return value.isEmpty ? nil : value
    }

    private static func resolveEnv(_ token: String?) -> ProviderTokenResolution? {
        guard let token else { return nil }
        return ProviderTokenResolution(token: token, source: .environment)
    }
}