package main

import (
	"embed"
	"io/fs"
	"net/http"
	"os"
	"strings"

	"github.com/gin-contrib/cors"
	"github.com/gin-gonic/gin"

	"flowstack/internal/database"
	"flowstack/internal/handler"
)

// 前端产物在构建期拷贝到 static/ 并嵌入二进制（run.sh build）
//
//go:embed all:static
var staticFS embed.FS

func main() {
	if err := database.Init(); err != nil {
		panic("数据库初始化失败: " + err.Error())
	}

	hub := handler.NewHub()
	r := gin.Default()

	// ?_clear=1 时下发 Clear-Site-Data，用于清除浏览器缓存的错误重定向等脏缓存
	// （历史 bug：/index.html 曾返回 301 → ./，浏览器永久缓存后反复触发 ERR_TOO_MANY_REDIRECTS）
	r.Use(func(c *gin.Context) {
		if c.Query("_clear") != "" {
			c.Header("Clear-Site-Data", "\"cache\"")
		}
		c.Next()
	})

	r.Use(cors.New(cors.Config{
		AllowAllOrigins:  true,
		AllowMethods:     []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
		AllowHeaders:     []string{"*"},
		AllowCredentials: false,
	}))

	r.GET("/health", func(c *gin.Context) {
		c.JSON(http.StatusOK, gin.H{"status": "ok", "app": "flowstack"})
	})

	api := r.Group("/api")
	{
		api.POST("/auth/login", handler.Login)

		api.GET("/summary", handler.GetSummary)
		api.GET("/settings", handler.GetSettings)
		api.PUT("/settings", handler.UpdateSettings)
		api.POST("/settings/test-llm", handler.TestLLM)

		api.POST("/ai/chat", handler.AiChat)
		api.POST("/ai/release", handler.AiRelease(hub))
		api.POST("/batch/parse", handler.BatchParse)

		api.GET("/pipelines", handler.ListPipelines)
		api.POST("/pipelines", handler.CreatePipeline)
		api.GET("/pipelines/:id", handler.GetPipelineDetail)
		api.PUT("/pipelines/:id", handler.UpdatePipeline)
		api.DELETE("/pipelines/:id", handler.DeletePipeline)
		api.PUT("/pipelines/:id/nodes", handler.SaveNodes)
		api.PUT("/pipelines/:id/edges", handler.SaveEdges)
		api.POST("/pipelines/:id/runs", handler.CreateRun(hub))
		api.POST("/hooks/pipeline/:id", handler.InboundPipelineHook(hub))

		api.GET("/runs", handler.ListRuns)
		api.GET("/runs/:runId", handler.GetRun)
		api.GET("/runs/:runId/logs/stream", handler.StreamLogs(hub))
		api.POST("/runs/:runId/retry", handler.RetryRun(hub))

		api.GET("/gitops/apps", handler.ListGitOpsApps)
		api.GET("/gitops/argo/apps", handler.ArgoList)
		api.POST("/gitops/argo/sync", handler.ArgoSync)
		api.GET("/gitops/argo/:appName/tree", handler.ArgoResourceTree)
		api.GET("/gitops/argo/:appName/diff", handler.ArgoDiff)

		api.GET("/plugins", handler.ListPlugins)
		api.GET("/plugins/available", handler.AvailablePlugins)
		api.POST("/plugins/install", handler.InstallPlugin)
		api.POST("/plugins/:id/toggle", handler.TogglePlugin)
		api.DELETE("/plugins/:id", handler.UninstallPlugin)

		api.GET("/hosts", handler.ListHosts)
		api.POST("/hosts", handler.CreateHost)
		api.PUT("/hosts/:id", handler.UpdateHost)
		api.DELETE("/hosts/:id", handler.DeleteHost)
		api.POST("/hosts/:id/test", handler.TestHost)

		api.GET("/clusters", handler.ListClusters)
		api.POST("/clusters", handler.CreateCluster)
		api.PUT("/clusters/:id", handler.UpdateCluster)
		api.DELETE("/clusters/:id", handler.DeleteCluster)
		api.POST("/clusters/:id/test", handler.TestCluster)

		api.GET("/credentials", handler.ListCredentials)
		api.POST("/credentials", handler.CreateCredential)
		api.PUT("/credentials/:id", handler.UpdateCredential)
		api.DELETE("/credentials/:id", handler.DeleteCredential)

		api.GET("/build-nodes", handler.ListBuildNodes)
		api.POST("/build-nodes", handler.CreateBuildNode)
		api.PUT("/build-nodes/:id", handler.UpdateBuildNode)
		api.DELETE("/build-nodes/:id", handler.DeleteBuildNode)
		api.POST("/build-nodes/:id/test", handler.TestBuildNode)

		api.GET("/tools", handler.ListTools)
		api.PUT("/tools/:id", handler.UpdateTool)
		api.POST("/tools/:id/check", handler.CheckTool)
		api.POST("/tools/:id/install", handler.InstallTool)

		api.GET("/webhooks", handler.ListWebhooks)
		api.POST("/webhooks", handler.CreateWebhook)
		api.PUT("/webhooks/:id", handler.UpdateWebhook)
		api.DELETE("/webhooks/:id", handler.DeleteWebhook)
		api.POST("/webhooks/:id/test", handler.TestWebhook)

		api.GET("/jenkins-servers", handler.ListJenkinsServers)
		api.POST("/jenkins-servers", handler.CreateJenkinsServer)
		api.PUT("/jenkins-servers/:id", handler.UpdateJenkinsServer)
		api.DELETE("/jenkins-servers/:id", handler.DeleteJenkinsServer)
		api.POST("/jenkins-servers/:id/test", handler.TestJenkinsServer)
		api.GET("/jenkins-servers/:id/jobs", handler.ListJenkinsJobs)
		api.POST("/jenkins-servers/:id/import", handler.ImportJenkinsJobs)
	}

	distFS, _ := fs.Sub(staticFS, "static")
	r.NoRoute(func(c *gin.Context) {
		path := strings.TrimPrefix(c.Request.URL.Path, "/")
		if path != "" {
			if f, err := distFS.Open(path); err == nil {
				f.Close()
				c.FileFromFS("/"+path, http.FS(distFS))
				return
			}
		}
		// SPA 路由回退：直接返回 index.html 内容
		// （不能用 FileFromFS，http.FileServer 会把 /index.html 301 到 ./ 造成死循环）
		index, err := fs.ReadFile(distFS, "index.html")
		if err != nil {
			c.String(http.StatusNotFound, "前端资源未构建")
			return
		}
		c.Data(http.StatusOK, "text/html; charset=utf-8", index)
	})

	port := os.Getenv("PORT")
	if port == "" {
		port = "9527"
	}
	if err := r.Run(":" + port); err != nil {
		panic("服务启动失败: " + err.Error())
	}
}