import {z} from 'zod'

export type DeleteUnitRequest = {preserve_content?: boolean | undefined};

export type DeleteApiTeacherCoursesCourseIdUnitsUnitIdArgs = {course_id: string, unit_id: string, body: DeleteUnitRequest};

export type DeleteApiTeacherCoursesCourseIdUnitsUnitIdOptions = {baseUrl: string, OAuth2PasswordBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const unitType = z.enum(["chapter", "section", "topic", "concept_explanation", "introduction", "conclusion", "content", "flashcards", "qcm"]);

export const courseBlock = z.object({id: z.string(), type: z.enum(["paragraph", "theorem", "definition", "example", "property", "explanation", "note", "demonstration", "illustration", "video", "interactive"]), content: z.string()});

export const courseUnit = z.object({unit_id: z.string().optional(), type: unitType, title: z.string(), unit_summary: z.string(), suggested_content_type: unitType.nullable().optional(), brief_description: z.string().nullable().optional(), generated_content: z.string().nullable().optional(), blocks: z.array(courseBlock).nullable().optional()});

export const course = z.object({_id: z.string().optional(), user_id: z.string(), is_teacher_course: z.boolean().optional(), folder_id: z.string().nullable().optional(), title: z.string(), subject: z.string().nullable().optional(), status: z.enum(["UPLOADING", "PROCESSING_IMAGES", "STRUCTURING", "GENERATING_CONTENT", "COMPLETED", "FAILED"]).optional(), original_image_paths: z.array(z.string()).optional(), raw_content_blob: z.string().nullable().optional(), units: z.array(courseUnit).nullable().optional(), generated_course_content: z.string().nullable().optional(), revision_deck_status: z.enum(["GENERATING", "COMPLETED", "FAILED"]).nullable().optional(), knowledge_quiz_status: z.enum(["GENERATING", "COMPLETED", "FAILED"]).nullable().optional(), append_status: z.enum(["GENERATING", "COMPLETED", "FAILED"]).nullable().optional(), append_started_at: z.string().nullable().optional(), append_error_message: z.string().nullable().optional(), error_message: z.string().nullable().optional(), warnings: z.array(z.string()).nullable().optional(), figures_crop: z.record(z.string(), z.unknown()).nullable().optional(), processing_options: z.record(z.string(), z.unknown()).nullable().optional(), source_type: z.enum(["student_upload", "teacher_assigned", "holiday_workbook", "excellence_course"]).nullable().optional(), excellence_course_key: z.string().nullable().optional(), excellence_content_signature: z.string().nullable().optional(), excellence_unmodified: z.boolean().nullable().optional(), holiday_course_context: z.record(z.string(), z.unknown()).nullable().optional(), created_at: z.string().optional(), updated_at: z.string().optional()});

export const courseStructureResponse = z.object({status: z.string(), message: z.string(), course: course});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Delete Unit
 * 
 * DELETE /teacher/courses/{course_id}/units/{unit_id}
 */
export const deleteApiTeacherCoursesCourseIdUnitsUnitId = async (args: DeleteApiTeacherCoursesCourseIdUnitsUnitIdArgs, options: DeleteApiTeacherCoursesCourseIdUnitsUnitIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth2PasswordBearer} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (OAuth2PasswordBearer !== undefined) headers.set('authorization', `Bearer ${OAuth2PasswordBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/teacher/courses/${encodeURIComponent(String(args.course_id))}/units/${encodeURIComponent(String(args.unit_id))}${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "DELETE", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(courseStructureResponse, await res.json())
};