package docs

import (
	"encoding/json"
	"strings"

	"github.com/swaggo/swag"
)

const docTemplate = `{
    "swagger": "2.0",
    "info": {
        "description": "{{.Description}}",
        "title": "{{.Title}}",
        "contact": {},
        "license": {},
        "version": "{{.Version}}"
    },
    "host": "{{.Host}}",
    "basePath": "{{.BasePath}}",
    "schemes": {{ marshal .Schemes }},
    "paths": {
        "/api/v1/users": {
            "get": {
                "tags": [
                    "users"
                ],
                "summary": "获取用户列表",
                "description": "返回所有用户",
                "produces": [
                    "application/json"
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "schema": {
                            "type": "array",
                            "items": {
                                "$ref": "#/definitions/model.User"
                            }
                        }
                    },
                    "500": {
                        "description": "Internal Server Error",
                        "schema": {
                            "$ref": "#/definitions/http.ErrorResponse"
                        }
                    }
                }
            },
            "post": {
                "tags": [
                    "users"
                ],
                "summary": "创建用户",
                "description": "创建新的用户记录",
                "consumes": [
                    "application/json"
                ],
                "produces": [
                    "application/json"
                ],
                "parameters": [
                    {
                        "description": "用户数据",
                        "name": "user",
                        "in": "body",
                        "required": true,
                        "schema": {
                            "$ref": "#/definitions/model.User"
                        }
                    }
                ],
                "responses": {
                    "201": {
                        "description": "Created",
                        "schema": {
                            "$ref": "#/definitions/model.User"
                        }
                    },
                    "400": {
                        "description": "Bad Request",
                        "schema": {
                            "$ref": "#/definitions/http.ErrorResponse"
                        }
                    },
                    "500": {
                        "description": "Internal Server Error",
                        "schema": {
                            "$ref": "#/definitions/http.ErrorResponse"
                        }
                    }
                }
            }
        },
        "/api/v1/users/{id}": {
            "get": {
                "tags": [
                    "users"
                ],
                "summary": "获取指定用户",
                "description": "根据用户 ID 获取详情",
                "produces": [
                    "application/json"
                ],
                "parameters": [
                    {
                        "type": "integer",
                        "format": "int64",
                        "description": "用户 ID",
                        "name": "id",
                        "in": "path",
                        "required": true
                    }
                ],
                "responses": {
                    "200": {
                        "description": "OK",
                        "schema": {
                            "$ref": "#/definitions/model.User"
                        }
                    },
                    "400": {
                        "description": "Bad Request",
                        "schema": {
                            "$ref": "#/definitions/http.ErrorResponse"
                        }
                    },
                    "404": {
                        "description": "Not Found",
                        "schema": {
                            "$ref": "#/definitions/http.ErrorResponse"
                        }
                    }
                }
            }
        }
    },
    "definitions": {
        "http.ErrorResponse": {
            "type": "object",
            "properties": {
                "error": {
                    "type": "string"
                }
            }
        },
        "model.User": {
            "type": "object",
            "properties": {
                "ID": {
                    "type": "integer",
                    "format": "int64"
                },
                "CreatedAt": {
                    "type": "string",
                    "format": "date-time"
                },
                "UpdatedAt": {
                    "type": "string",
                    "format": "date-time"
                },
                "DeletedAt": {
                    "type": "string",
                    "format": "date-time"
                },
                "name": {
                    "type": "string"
                },
                "email": {
                    "type": "string"
                }
            }
        }
    }
}`

type swaggerInfo struct {
	Version     string
	Host        string
	BasePath    string
	Schemes     []string
	Title       string
	Description string
}

// SwaggerInfo holds exported Swagger Info so clients can modify it
var SwaggerInfo = swaggerInfo{
	Version:     "1.0",
	Host:        "",
	BasePath:    "/api/v1",
	Schemes:     []string{"http"},
	Title:       "Aurora Service API",
	Description: "Aurora Golang 示例 REST API，基于 Gin + GORM。",
}

type s struct{}

func (s *s) ReadDoc() string {
	doc := docTemplate
	doc = strings.Replace(doc, "{{.Version}}", SwaggerInfo.Version, -1)
	doc = strings.Replace(doc, "{{.Host}}", SwaggerInfo.Host, -1)
	doc = strings.Replace(doc, "{{.BasePath}}", SwaggerInfo.BasePath, -1)
	doc = strings.Replace(doc, "{{.Title}}", SwaggerInfo.Title, -1)
	doc = strings.Replace(doc, "{{.Description}}", SwaggerInfo.Description, -1)
	doc = strings.Replace(doc, "{{ marshal .Schemes }}", marshal(SwaggerInfo.Schemes), -1)
	return doc
}

func marshal(v interface{}) string {
	if v == nil {
		return "[]"
	}

	b, err := json.Marshal(v)
	if err != nil {
		return "[]"
	}

	return strings.ReplaceAll(string(b), `\u0026`, "&")
}

func init() {
	swag.Register(swag.Name, &s{})
}