package main

import (
	"context"
	"fmt"
	"log"
	"os"
	"time"

	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
	"github.com/gofiber/fiber/v2/middleware/logger"
	"github.com/gooseek/backend/internal/finance"
)

func main() {
	heatmapSvc := finance.NewHeatmapService(finance.HeatmapConfig{
		CacheTTL:        5 * time.Minute,
		RefreshInterval: time.Minute,
	})

	app := fiber.New(fiber.Config{
		ReadTimeout:  30 * time.Second,
		WriteTimeout: 30 * time.Second,
	})

	app.Use(logger.New())
	app.Use(cors.New())

	app.Get("/health", func(c *fiber.Ctx) error {
		return c.JSON(fiber.Map{"status": "ok"})
	})

	app.Get("/api/v1/heatmap/:market", func(c *fiber.Ctx) error {
		market := c.Params("market")
		timeRange := c.Query("range", "1d")

		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		defer cancel()

		heatmap, err := heatmapSvc.GetMarketHeatmap(ctx, market, timeRange)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": err.Error()})
		}

		return c.JSON(heatmap)
	})

	app.Get("/api/v1/heatmap/:market/treemap", func(c *fiber.Ctx) error {
		market := c.Params("market")
		timeRange := c.Query("range", "1d")

		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		defer cancel()

		heatmap, err := heatmapSvc.GetMarketHeatmap(ctx, market, timeRange)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": err.Error()})
		}

		treemapData := heatmapSvc.GenerateTreemapData(heatmap)
		return c.JSON(treemapData)
	})

	app.Get("/api/v1/heatmap/:market/grid", func(c *fiber.Ctx) error {
		market := c.Params("market")
		timeRange := c.Query("range", "1d")
		rows := c.QueryInt("rows", 5)
		cols := c.QueryInt("cols", 10)

		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		defer cancel()

		heatmap, err := heatmapSvc.GetMarketHeatmap(ctx, market, timeRange)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": err.Error()})
		}

		gridData := heatmapSvc.GenerateGridData(heatmap, rows, cols)
		return c.JSON(fiber.Map{"grid": gridData, "rows": rows, "cols": cols})
	})

	app.Get("/api/v1/heatmap/:market/sector/:sector", func(c *fiber.Ctx) error {
		market := c.Params("market")
		sector := c.Params("sector")
		timeRange := c.Query("range", "1d")

		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		defer cancel()

		heatmap, err := heatmapSvc.GetSectorHeatmap(ctx, market, sector, timeRange)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": err.Error()})
		}

		return c.JSON(heatmap)
	})

	app.Get("/api/v1/movers/:market", func(c *fiber.Ctx) error {
		market := c.Params("market")
		count := c.QueryInt("count", 10)

		ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
		defer cancel()

		movers, err := heatmapSvc.GetTopMovers(ctx, market, count)
		if err != nil {
			return c.Status(500).JSON(fiber.Map{"error": err.Error()})
		}

		return c.JSON(movers)
	})

	app.Get("/api/v1/markets", func(c *fiber.Ctx) error {
		markets := []map[string]interface{}{
			{"id": "sp500", "name": "S&P 500", "region": "us"},
			{"id": "nasdaq", "name": "NASDAQ", "region": "us"},
			{"id": "dow", "name": "Dow Jones", "region": "us"},
			{"id": "moex", "name": "MOEX", "region": "ru"},
			{"id": "crypto", "name": "Cryptocurrency", "region": "global"},
			{"id": "forex", "name": "Forex", "region": "global"},
		}
		return c.JSON(fiber.Map{"markets": markets})
	})

	port := getEnvInt("PORT", 3033)
	log.Printf("finance-heatmap-svc listening on :%d", port)
	log.Fatal(app.Listen(fmt.Sprintf(":%d", port)))
}

func getEnvInt(key string, defaultValue int) int {
	if val := os.Getenv(key); val != "" {
		var result int
		if _, err := fmt.Sscanf(val, "%d", &result); err == nil {
			return result
		}
	}
	return defaultValue
}