package contract

import (
	"context"
	"net/http"
)

const (
	ModelSourcePlatform = "platform"
	ModelSourceCustom   = "custom"
)

// PlatformAIConfig is a runtime-only OpenAI-compatible model configuration.
// Credentials and the signed HTTP client are supplied by the host and are
// never persisted in Agent Desk tables or returned by dashboard APIs.
type PlatformAIConfig struct {
	BaseURL            string
	APIKey             string
	ChatEnabled        bool
	ChatModel          string
	VisionEnabled      bool
	VisionModel        string
	EmbeddingEnabled   bool
	ModelName          string
	EmbeddingModel     string
	EmbeddingDimension int
	MaxOutputTokens    int
	TimeoutMS          int
	MaxRetryCount      int
	HTTPClient         *http.Client
}

type PlatformAIStatus struct {
	Enabled            bool    `json:"enabled"`
	Balance            float64 `json:"balance"`
	Currency           string  `json:"currency"`
	DefaultProvider    string  `json:"default_provider"`
	DefaultModel       string  `json:"default_model"`
	ChatEnabled        bool    `json:"chat_enabled"`
	ChatProvider       string  `json:"chat_provider"`
	ChatModel          string  `json:"chat_model"`
	VisionEnabled      bool    `json:"vision_enabled"`
	VisionModel        string  `json:"vision_model"`
	EmbeddingEnabled   bool    `json:"embedding_enabled"`
	EmbeddingModel     string  `json:"embedding_model"`
	EmbeddingDimension int     `json:"embedding_dimension"`
	RechargeURL        string  `json:"recharge_url"`
}

// PlatformAIProvider lets the host resolve the current model source on every
// request, so changing the system setting takes effect without restarting.
type PlatformAIProvider interface {
	ModelSource(context.Context) (string, error)
	Config(context.Context) (*PlatformAIConfig, error)
	Status(context.Context) (*PlatformAIStatus, error)
}