// Package deepseek implements the go-llm v2 provider interface for DeepSeek
// (https://platform.deepseek.com). DeepSeek speaks the OpenAI Chat Completions
// protocol, so this package is a thin wrapper around openaicompat with its own
// defaults and per-model Rules.
package deepseek

import (
	"strings"

	"gitea.stevedudenhoeffer.com/steve/go-llm/v2/openaicompat"
)

// DefaultBaseURL is the public DeepSeek API endpoint.
const DefaultBaseURL = "https://api.deepseek.com/v1"

// Provider is a type alias over openaicompat.Provider.
type Provider = openaicompat.Provider

// New creates a new DeepSeek provider. An empty baseURL uses DefaultBaseURL.
func New(apiKey, baseURL string) *Provider {
	if baseURL == "" {
		baseURL = DefaultBaseURL
	}
	return openaicompat.New(apiKey, baseURL, openaicompat.Rules{
		// DeepSeek's chat and reasoner models are text-only.
		SupportsVision: func(string) bool { return false },
		// Reasoner doesn't accept tool calls.
		SupportsTools: func(m string) bool {
			return !strings.Contains(m, "reasoner")
		},
		// Reasoner rejects user-supplied temperature.
		RestrictTemperature: func(m string) bool {
			return strings.Contains(m, "reasoner")
		},
		// DeepSeek's reasoner thinks unconditionally; the API rejects an
		// explicit reasoning_effort parameter. The thinking trace is
		// surfaced via openaicompat's reasoning_content extraction without
		// any opt-in.
		SupportsReasoning: func(string) bool { return false },
	})
}