package main

import (
	"context"
	"errors"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"time"

	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/analytics"
	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/api"
	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/config"
	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/database"
	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/growthreport"
	"git.amiirkhl.ir/starcoach-hackathon/zarinpal-analytics-backend/internal/identity"
	"github.com/redis/go-redis/v9"
)

func main() {
	logger := slog.New(slog.NewJSONHandler(os.Stdout, nil))
	cfg, err := config.Load()
	if err != nil {
		logger.Error("configuration failed", "error", err)
		os.Exit(1)
	}
	if err := cfg.ValidateAPI(); err != nil {
		logger.Error("api configuration failed", "error", err)
		os.Exit(1)
	}
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
	defer cancel()
	pool, err := database.Open(ctx, cfg.DatabaseURL)
	if err != nil {
		logger.Error("database connection failed", "error", err)
		os.Exit(1)
	}
	defer pool.Close()
	redisClient := redis.NewClient(&redis.Options{Addr: cfg.RedisAddr, Password: cfg.RedisPassword})
	defer redisClient.Close()
	repository := growthreport.NewRepository(pool)
	coordinator := growthreport.NewCoordinator(redisClient, growthreport.CoordinatorConfig{CreatePerMinute: cfg.AICreatePerMinute, UncachedPerDay: cfg.AIUncachedScopesPerDay, DailyRequests: cfg.AIDailyRequestBudget, DailyTokens: cfg.AIDailyTokenBudget, MaxConcurrent: cfg.AIMaxConcurrent})
	growthService := growthreport.NewService(repository, coordinator, growthreport.ServiceConfig{Enabled: cfg.AIGrowthEnabled, Model: cfg.AvalAIModel, PromptVersion: "1.0.0", SchemaVersion: "1.0.0"})
	handler := api.NewServer(identity.New(pool), analytics.New(pool, cfg.CursorSecret), logger, cfg.FrontendOrigin, cfg.CookieSecure, growthService).Handler()
	server := &http.Server{Addr: cfg.HTTPAddr, Handler: handler, ReadHeaderTimeout: 5 * time.Second, ReadTimeout: 15 * time.Second, WriteTimeout: 65 * time.Second, IdleTimeout: 60 * time.Second}
	go func() {
		<-ctx.Done()
		shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 10*time.Second)
		defer shutdownCancel()
		_ = server.Shutdown(shutdownCtx)
	}()
	logger.Info("api listening", "address", cfg.HTTPAddr)
	if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
		logger.Error("api failed", "error", err)
		os.Exit(1)
	}
}