package routes_test

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"strings"
	"testing"
	"time"

	"doormile/db"
	"doormile/internal/ai/registry"
	"doormile/internal/testpg"
	"doormile/models"
)

// End to end through the real router and real handlers, against a real
// Postgres. Skipped unless REGISTRY_TEST_DSN is set; the DSN must be a
// THROWAWAY database — the five registry tables are dropped and recreated.
// See internal/ai/registry/store_integration_test.go for how to start one.

func registryApp(t *testing.T) func(method, path, bearer, body string, headers ...string) (int, http.Header, map[string]any) {
	t.Helper()
	dsn := os.Getenv("REGISTRY_TEST_DSN")
	if dsn == "" {
		t.Skip("REGISTRY_TEST_DSN not set; skipping Postgres end-to-end test")
	}
	gdb := testpg.Open(t, dsn, "airegistry_routes_test")
	all := []any{&models.AIRegistryAudit{}, &models.AISkillTool{}, &models.AISkill{}, &models.AITool{}, &models.AIAgent{}}
	if err := gdb.Migrator().DropTable(all...); err != nil {
		t.Fatal(err)
	}
	if err := gdb.AutoMigrate(all...); err != nil {
		t.Fatal(err)
	}
	if err := registry.Seed(gdb); err != nil {
		t.Fatal(err)
	}
	prev := db.DB
	db.DB = gdb
	t.Cleanup(func() { db.DB = prev })

	app := newApp()
	return func(method, path, bearer, body string, headers ...string) (int, http.Header, map[string]any) {
		var req *http.Request
		if body != "" {
			req = httptest.NewRequest(method, path, strings.NewReader(body))
			req.Header.Set("Content-Type", "application/json")
		} else {
			req = httptest.NewRequest(method, path, nil)
		}
		if bearer != "" {
			req.Header.Set("Authorization", "Bearer "+bearer)
		}
		for i := 0; i+1 < len(headers); i += 2 {
			req.Header.Set(headers[i], headers[i+1])
		}
		resp, err := app.Test(req, int(10*time.Second/time.Millisecond))
		if err != nil {
			t.Fatalf("%s %s: %v", method, path, err)
		}
		defer resp.Body.Close()
		var out map[string]any
		_ = json.NewDecoder(resp.Body).Decode(&out)
		return resp.StatusCode, resp.Header, out
	}
}

func TestPGRegistryEndToEnd(t *testing.T) {
	call := registryApp(t)
	admin := token(t, 1, 1)

	// Read the inventory.
	code, _, body := call(http.MethodGet, "/api/v1/admin/ai/agents", admin, "")
	if code != http.StatusOK {
		t.Fatalf("GET agents = %d %v", code, body)
	}
	if total, _ := body["total"].(float64); int(total) != len(registry.SeedAgents) {
		t.Errorf("GET agents total = %v, want %d (body %v)", body["total"], len(registry.SeedAgents), body)
	}

	code, _, body = call(http.MethodGet, "/api/v1/admin/ai/skills?agent=CONSOLE_OPS_AGENT", token(t, 1, 3), "")
	if code != http.StatusOK {
		t.Fatalf("manager GET skills = %d %v", code, body)
	}

	// Patch a skill as admin: 200, version 2, thresholds as a JSON object.
	code, _, body = call(http.MethodPatch, "/api/v1/admin/ai/skills/skill_doorstep_stall", admin, `{"enabled":false,"thresholds":{"arrivedStalledMin":30}}`)
	if code != http.StatusOK {
		t.Fatalf("PATCH skill = %d %v", code, body)
	}
	data, _ := body["data"].(map[string]any)
	th, _ := data["thresholds"].(map[string]any)
	if data["enabled"] != false || data["version"] != float64(2) || th["arrivedStalledMin"] != float64(30) {
		t.Errorf("PATCH response = %v", data)
	}

	// A bad value is a 400 naming the problem, and changes nothing.
	code, _, body = call(http.MethodPatch, "/api/v1/admin/ai/skills/skill_doorstep_stall", admin, `{"thresholds":{"arrivedStalledMin":999}}`)
	if code != http.StatusBadRequest {
		t.Errorf("out-of-range PATCH = %d %v, want 400", code, body)
	}
	code, _, _ = call(http.MethodPatch, "/api/v1/admin/ai/skills/nope", admin, `{"enabled":true}`)
	if code != http.StatusNotFound {
		t.Errorf("PATCH unknown skill = %d, want 404", code)
	}

	// Autonomy: refused without the typed confirmation, accepted with it.
	code, _, _ = call(http.MethodPatch, "/api/v1/admin/ai/agents/EXCEPTION_AGENT", admin, `{"autonomous":true}`)
	if code != http.StatusBadRequest {
		t.Errorf("autonomy without confirm = %d, want 400", code)
	}
	code, _, body = call(http.MethodPatch, "/api/v1/admin/ai/agents/EXCEPTION_AGENT", admin, `{"autonomous":false,"model":"claude-haiku-4-5-20251001"}`)
	if code != http.StatusOK {
		t.Errorf("model PATCH = %d %v", code, body)
	}

	// Create a custom skill.
	code, _, body = call(http.MethodPost, "/api/v1/admin/ai/skills", admin, `{"agentid":"CONSOLE_OPS_AGENT","title":"Night shift watch","tools":["scan_bookings"]}`)
	if code != http.StatusCreated {
		t.Fatalf("POST skill = %d %v", code, body)
	}

	// The audit shows all three changes.
	code, _, body = call(http.MethodGet, "/api/v1/admin/ai/audit", admin, "")
	if total, _ := body["total"].(float64); code != http.StatusOK || int(total) != 4 {
		t.Errorf("audit = %d, total %v, want 4 rows (enabled, thresholds, model, created)", code, body["total"])
	}
	// Every row names who made the change, even when the login has no appusers row.
	for _, row := range body["data"].([]any) {
		if email := row.(map[string]any)["changedbyemail"]; email != "test@doormile.com" {
			t.Errorf("audit row changedbyemail = %v, want the token's email", email)
		}
	}

	// The engine's endpoint: 200 with an ETag, then 304 for the same tag.
	t.Setenv("INTERNAL_API_KEY", "engine-key")
	code, hdr, body := call(http.MethodGet, "/api/v1/internal/ai/registry", "", "", "X-Internal-Key", "engine-key")
	tag := hdr.Get("ETag")
	if code != http.StatusOK || tag == "" {
		t.Fatalf("internal registry = %d, etag %q", code, tag)
	}
	if snap, _ := body["data"].(map[string]any); len(snap["agents"].([]any)) != len(registry.SeedAgents) {
		t.Errorf("internal registry agents = %v", len(snap["agents"].([]any)))
	}
	code, _, _ = call(http.MethodGet, "/api/v1/internal/ai/registry", "", "", "X-Internal-Key", "engine-key", "If-None-Match", tag)
	if code != http.StatusNotModified {
		t.Errorf("If-None-Match with the current tag = %d, want 304", code)
	}
}