package api

import (
	"net/http"
	"strconv"
)

const openAPISpecYAML = `openapi: 3.0.3
info:
  title: BlueArchive Toolkit bat-api
  version: 0.1.0
  description: Resource bootstrap, read-only distribution, and authenticated Rust bat control proxy.
servers:
  - url: http://127.0.0.1:18080
security:
  - bearerAuth: []
  - queryToken: []
paths:
  /healthz:
    get:
      summary: Liveness and refresh diagnostics
      responses:
        "200":
          description: Service is alive.
  /readyz:
    get:
      summary: Release readiness
      responses:
        "200":
          description: A distributable release is available.
        "503":
          description: No distributable release is available.
  /v1/bootstrap:
    get:
      summary: Startup resource bootstrap
      responses:
        "200":
          description: Resource bootstrap response.
        "503":
          description: Release is not ready.
  /v1/launcher/bootstrap:
    get:
      summary: Launcher-shaped resource bootstrap
      responses:
        "200":
          description: Launcher bootstrap response.
        "503":
          description: Release is not ready.
  /api/launcher/game/config:
    get:
      summary: Resource-only launcher game config compatibility
      responses:
        "200":
          description: Launcher envelope with resource metadata.
  /api/launcher/game/config/json:
    get:
      summary: Resource-only launcher manifest URL compatibility
      parameters:
        - name: version
          in: query
          schema:
            type: string
        - name: file_path
          in: query
          schema:
            type: string
      responses:
        "200":
          description: Launcher envelope pointing to resource bootstrap JSON.
  /api/launcher/advanced/game/download/cdn:
    get:
      summary: Resource-only launcher CDN compatibility
      responses:
        "200":
          description: Launcher envelope with public base URL as CDN root.
  /v1/release:
    get:
      summary: Current release summary
      responses:
        "200":
          description: Release summary.
  /v1/resources:
    get:
      summary: Paginated resource manifest entries
      parameters:
        - name: offset
          in: query
          schema:
            type: integer
            minimum: 0
        - name: limit
          in: query
          schema:
            type: integer
            minimum: 1
            maximum: 1000
      responses:
        "200":
          description: Resource list page.
  /v1/server-info:
    get:
      summary: Rewritten server-info document
      responses:
        "200":
          description: Server-info JSON with AddressablesCatalogUrlRoot rewritten.
  /openapi.yaml:
    get:
      summary: OpenAPI document
      responses:
        "200":
          description: OpenAPI YAML.
  /admin/:
    get:
      summary: Admin control entry
      responses:
        "200":
          description: Admin links and allowlisted control actions.
  /admin/schedules:
    get:
      summary: List Rust-owned resource workflow schedules
      parameters:
        - name: id
          in: query
          schema:
            type: string
        - name: group
          in: query
          schema:
            type: string
            enum: [res, parse, i18n]
        - name: enabled
          in: query
          schema:
            type: boolean
      responses:
        "200":
          description: Current schedule JSON report.
        "401":
          description: Missing or invalid admin token.
        "503":
          description: Rust bat schedule backend is unavailable.
  /admin/control/{action}:
    post:
      summary: Forward an allowlisted control or schedule action to Rust bat
      parameters:
        - name: action
          in: path
          required: true
          schema:
            type: string
            enum: [reload, refresh, restart, sync, verify, repair, catalog-refresh, schedule-add, schedule-update, schedule-remove, schedule-run]
      requestBody:
        required: false
        content:
          application/json:
            schema:
              type: object
              additionalProperties: false
              properties:
                force:
                  type: boolean
                id:
                  type: string
                group:
                  type: string
                action:
                  type: string
                args:
                  type: array
                  items:
                    type: string
                next_run_unix_seconds:
                  type: integer
                  format: int64
                delay_seconds:
                  type: integer
                  format: int64
                every_seconds:
                  type: integer
                  format: int64
                count:
                  type: integer
                  format: int64
                max_runs:
                  type: integer
                  format: int64
                  minimum: 1
                clear_args:
                  type: boolean
                clear_every:
                  type: boolean
                enabled:
                  type: boolean
      responses:
        "202":
          description: Rust bat accepted the control request.
        "400":
          description: Invalid action parameters.
        "401":
          description: Missing or invalid admin token.
        "403":
          description: Control is not exposed or no admin token is configured.
        "501":
          description: Rust bat does not implement the requested control action.
        "502":
          description: Rust bat rejected the control request.
  /prod-clientpatch.bluearchiveyostar.com/{path}:
    get:
      summary: CDN-shaped resource bytes
      parameters:
        - name: path
          in: path
          required: true
          schema:
            type: string
      responses:
        "200":
          description: Resource bytes.
        "206":
          description: Partial resource bytes.
    head:
      summary: CDN-shaped resource metadata
      responses:
        "200":
          description: Resource headers.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
    queryToken:
      type: apiKey
      in: query
      name: bat_token
`

func (s *Server) handleOpenAPI(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet && r.Method != http.MethodHead {
		writeErrorJSON(w, http.StatusMethodNotAllowed, "method_not_allowed", "method not allowed")
		return
	}
	w.Header().Set("Content-Type", "application/yaml; charset=utf-8")
	w.Header().Set("Cache-Control", "no-store")
	w.Header().Set("Content-Length", strconv.Itoa(len(openAPISpecYAML)))
	w.WriteHeader(http.StatusOK)
	if r.Method == http.MethodHead {
		return
	}
	_, _ = w.Write([]byte(openAPISpecYAML))
}