package main

import (
	"context"
	"fmt"
	"path/filepath"
	"strings"
	"time"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/channel/session"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/config"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/iot"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/logger"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/platform"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/documents"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/exec"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/history"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/task"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/services/automations"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/services/backthink"
)

// wireAuxiliary 组装执行提供者、任务管理器、IoT 管理器、渠道会话管理器、
// 自动化服务与后台思考服务。
func (a *app) wireAuxiliary() error {
	provider, err := exec.New(a.cfg.ExecSandbox, a.log)
	if err != nil {
		return fmt.Errorf("exec provider: %w", err)
	}
	a.execProv = provider
	tmgr, err := task.New(a.cfg, provider, a.log, task.WithBus(a.bus))
	if err != nil {
		return fmt.Errorf("task manager: %w", err)
	}
	a.tasks = tmgr

	iotMgr, err := iot.New(a.cfg.IoT, a.log, iot.WithBus(a.bus))
	if err != nil {
		return fmt.Errorf("iot: %w", err)
	}
	a.iot = iotMgr

	sess, err := session.New(context.Background(), a.db, a.log)
	if err != nil {
		return fmt.Errorf("session manager: %w", err)
	}
	a.sessions = sess

	hist, herr := history.NewStore(context.Background(), a.db, a.log,
		history.WithDocumentRefs(documents.NewRefCounter(a.log)))
	if herr != nil {
		return fmt.Errorf("history store: %w", herr)
	}
	a.history = hist

	automation, err := automations.NewService(automations.Config{}, automations.Deps{
		Bus:  a.bus,
		Loop: a.loop,
		Log:  logger.WithSource(a.log, "services/automations"),
	})
	if err != nil {
		return fmt.Errorf("automations: %w", err)
	}
	a.automation = automation

	bt, err := backthink.New(backthink.ConfigFromBackground(a.cfg.Background), backthink.Deps{
		Bus:      a.bus,
		Thinker:  backthink.NewLoopThinker(a.loop, a.history),
		Recent:   a.history,
		State:    backthink.NewIoTStateProvider(iotMgr, a.log),
		Exporter: backthink.NewPushOutlet(a.pushOutletConfig()),
		DB:       a.db,
		Log:      logger.WithSource(a.log, "services/backthink"),
	})
	if err != nil {
		return fmt.Errorf("backthink: %w", err)
	}
	a.backthink = bt

	a.wireVoice()
	a.wireMCP()
	a.wireSkills()
	a.wireTerminalTool()
	a.wireSubagentTool()
	a.wireSessionReadTool()
	return nil
}

// pushOutletConfig 把环境变量里的推送出口配置块映射为 backthink 的导出器配置。
// 个推（Getui）凭据只被 config 读取、并不消费：备用 SDK 尚未接入，因此出口在
// 待接入该档位时记日志，而不是伪造一次推送。token 只透传，绝不写日志。
func (a *app) pushOutletConfig() backthink.PushOutletConfig {
	po := a.cfg.PushOutlet
	return backthink.PushOutletConfig{
		Enabled: po.Enabled,
		URL:     po.URL,
		Token:   po.Token,
		Timeout: time.Duration(po.TimeoutSec) * time.Second,
		Log:     a.log,
	}
}

// close 按依赖顺序关闭每个子系统并释放资源。
func (a *app) close(ctx context.Context) {
	// 文档回收循环要先用连接池（每轮一次查询），因此排在关库之前。
	a.docGC.stop()
	// 用量落库与保留期清理同样要用连接池：先把队列里剩下的样本写完，再停清理。
	a.stopUsage()
	if a.backthink != nil {
		_ = a.backthink.Stop(ctx)
	}
	if a.automation != nil {
		_ = a.automation.Stop(ctx)
	}
	if a.channelBridge != nil {
		a.channelBridge.Stop(ctx)
	}
	if a.scheduler != nil {
		_ = a.scheduler.CancelAll(ctx)
	}
	if a.gw != nil {
		a.gw.Close()
	}
	for _, reg := range a.mcpRegs {
		_ = reg.Unregister(ctx)
	}
	if a.plugins != nil {
		a.plugins.Close(ctx)
	}
	if a.tasks != nil {
		_ = a.tasks.Close()
	}
	if a.vindex != nil {
		_ = a.vindex.Close()
	}
	if a.bus != nil {
		_ = a.bus.Close()
	}
	if a.db != nil {
		_ = a.db.Close()
	}
	a.log.Info("cyrene shutdown complete")
}

// resolveDataDir 返回配置的数据目录（来自 .env / 环境变量，经 cfg.DataDir）；
// 只有在没有配置目录时才回落到与操作系统相称的默认值。
func resolveDataDir(cfg *config.Config) string {
	if cfg.DataDir != "" {
		return cfg.DataDir
	}
	return platform.DefaultDataDir()
}

// resolveSQLitePath 返回实际使用的 SQLite 路径：当配置里仍是默认值时，
// 把它推导到数据目录下。
func resolveSQLitePath(cfg *config.Config, dataDir string) string {
	p := cfg.DB.SQLitePath
	if strings.TrimSpace(p) == "" || p == defaultSQLitePath {
		return filepath.Join(dataDir, "cyrene.db")
	}
	return p
}