package config

import (
	"os"
	"strconv"
)

type Config struct {
	AppEnv                          string
	HTTPAddr                        string
	DatabaseURL                     string
	RedisURL                        string
	RedisKeyPrefix                  string
	AuthUsername                    string
	AuthPassword                    string
	ModelBaseURL                    string
	ModelAPIKey                     string
	ModelName                       string
	ModelContextSize                int
	ModelTimeoutSec                 int
	A2AEdgeURL                      string
	A2AAgentURL                     string
	A2AToken                        string
	A2ATimeoutSec                   int
	MattermostBaseURL               string
	MattermostToken                 string
	MattermostChannelID             string
	PlaneBaseURL                    string
	PlaneToken                      string
	PlaneWebhookSecret              string
	PlaneWorkspaceSlug              string
	PlaneWorkspaceID                string
	PlaneCreationBacklogStateID     string
	PlaneAgentAssigneeID            string
	PlaneSelfActorID                string
	JiraBaseURL                     string
	JiraEmail                       string
	JiraAPIToken                    string
	WorkflowTaskTimeoutSec          int
	AuthoringStaleAfterSec          int
	ProtoSocketPath                 string
	ProtoSocketHeartbeatIntervalSec int
	ProtoSocketHeartbeatWaitSec     int
	GitoProtoSocketURL              string
	GitoWebhookSecret               string
	GitoRepoID                      string
	GitoBranch                      string
	GitoDevelopRepoPath             string
	GitoRemoteName                  string
	RoadmapCreationTodoStateID      string
	PlaneProjectID                  string
	ModelResponsesStream            bool
}

// GitoBranchEventsEnabled reports whether the Gito branch event consumer should
// run. It requires an endpoint, a repo id, a local develop checkout path to
// scan against, and a Todo state id to project into. Any missing piece keeps the
// consumer disabled so the rest of the Core server behaves exactly as before.
func (c Config) GitoBranchEventsEnabled() bool {
	return c.GitoProtoSocketURL != "" &&
		c.GitoRepoID != "" &&
		c.GitoDevelopRepoPath != "" &&
		c.RoadmapCreationTodoStateID != ""
}

// GitoWebhookConsumerEnabled reports whether the Gito HTTP webhook receiver
// should be wired. Requires secret, repo id, develop repo path, and todo state
// id. Branch defaults to "develop" and is not required.
func (c Config) GitoWebhookConsumerEnabled() bool {
	return c.GitoWebhookSecret != "" &&
		c.GitoRepoID != "" &&
		c.GitoDevelopRepoPath != "" &&
		c.RoadmapCreationTodoStateID != ""
}

func Load() Config {
	return Config{
		AppEnv:                          getEnv("APP_ENV", "local"),
		HTTPAddr:                        getEnv("HTTP_ADDR", ":8080"),
		DatabaseURL:                     os.Getenv("DATABASE_URL"),
		RedisURL:                        os.Getenv("REDIS_URL"),
		RedisKeyPrefix:                  os.Getenv("REDIS_KEY_PREFIX"),
		AuthUsername:                    getEnv("AUTH_USERNAME", "nomadcode"),
		AuthPassword:                    os.Getenv("AUTH_PASSWORD"),
		ModelBaseURL:                    getEnv("MODEL_BASE_URL", "http://toki-labs.com:18083/v1"),
		ModelAPIKey:                     os.Getenv("MODEL_API_KEY"),
		ModelName:                       getEnv("MODEL_NAME", "codex"),
		ModelContextSize:                getEnvInt("MODEL_CONTEXT_SIZE", 0),
		ModelTimeoutSec:                 getEnvInt("MODEL_TIMEOUT_SEC", 900),
		A2AEdgeURL:                      firstEnv("A2A_EDGE_URL", "A2A_AGENT_URL"),
		A2AAgentURL:                     firstEnv("A2A_AGENT_URL", "A2A_EDGE_URL"),
		A2AToken:                        os.Getenv("A2A_TOKEN"),
		A2ATimeoutSec:                   getEnvInt("A2A_TIMEOUT_SEC", 300),
		MattermostBaseURL:               os.Getenv("MATTERMOST_BASE_URL"),
		MattermostToken:                 os.Getenv("MATTERMOST_TOKEN"),
		MattermostChannelID:             os.Getenv("MATTERMOST_CHANNEL_ID"),
		PlaneBaseURL:                    os.Getenv("PLANE_BASE_URL"),
		PlaneToken:                      os.Getenv("PLANE_TOKEN"),
		PlaneWebhookSecret:              os.Getenv("PLANE_WEBHOOK_SECRET"),
		PlaneWorkspaceSlug:              os.Getenv("PLANE_WORKSPACE_SLUG"),
		PlaneWorkspaceID:                os.Getenv("PLANE_WORKSPACE_ID"),
		PlaneCreationBacklogStateID:     firstEnv("PLANE_CREATION_BACKLOG_STATE_ID", "PLANE_BACKLOG_STATE_ID"),
		PlaneAgentAssigneeID:            os.Getenv("PLANE_AGENT_ASSIGNEE_ID"),
		PlaneSelfActorID:                os.Getenv("PLANE_SELF_ACTOR_ID"),
		JiraBaseURL:                     os.Getenv("JIRA_BASE_URL"),
		JiraEmail:                       os.Getenv("JIRA_EMAIL"),
		JiraAPIToken:                    os.Getenv("JIRA_API_TOKEN"),
		WorkflowTaskTimeoutSec:          getEnvInt("WORKFLOW_TASK_TIMEOUT_SEC", 300),
		AuthoringStaleAfterSec:          getEnvInt("AUTHORING_STALE_AFTER_SEC", 1200),
		ProtoSocketPath:                 getEnv("PROTO_SOCKET_PATH", "/proto-socket"),
		ProtoSocketHeartbeatIntervalSec: getEnvInt("PROTO_SOCKET_HEARTBEAT_INTERVAL_SEC", 30),
		ProtoSocketHeartbeatWaitSec:     getEnvInt("PROTO_SOCKET_HEARTBEAT_WAIT_SEC", 10),
		GitoProtoSocketURL:              os.Getenv("GITO_PROTO_SOCKET_URL"),
		GitoWebhookSecret:               os.Getenv("GITO_WEBHOOK_SECRET"),
		GitoRepoID:                      os.Getenv("GITO_REPO_ID"),
		GitoBranch:                      getEnv("GITO_BRANCH", "develop"),
		GitoDevelopRepoPath:             os.Getenv("GITO_DEVELOP_REPO_PATH"),
		GitoRemoteName:                  getEnv("GITO_REMOTE_NAME", "origin"),
		RoadmapCreationTodoStateID:      firstEnv("ROADMAP_CREATION_TODO_STATE_ID", "PLANE_TODO_STATE_ID"),
		PlaneProjectID:                  os.Getenv("PLANE_PROJECT_ID"),
		ModelResponsesStream:            getEnvBool("MODEL_RESPONSES_STREAM", false),
	}
}

func getEnv(key, fallback string) string {
	value := os.Getenv(key)
	if value == "" {
		return fallback
	}
	return value
}

func firstEnv(keys ...string) string {
	for _, key := range keys {
		if value := os.Getenv(key); value != "" {
			return value
		}
	}
	return ""
}

func getEnvInt(key string, fallback int) int {
	value := os.Getenv(key)
	if value == "" {
		return fallback
	}
	parsed, err := strconv.Atoi(value)
	if err != nil {
		return fallback
	}
	return parsed
}

func getEnvBool(key string, fallback bool) bool {
	value := os.Getenv(key)
	if value == "" {
		return fallback
	}
	parsed, err := strconv.ParseBool(value)
	if err != nil {
		return fallback
	}
	return parsed
}