package codersdk

import (
	"context"
	"encoding/json"
	"fmt"
	"net/http"
	"time"

	"github.com/google/uuid"
	"golang.org/x/xerrors"

	"github.com/coder/coder/coderd/database"
)

// Workspace is a deployment of a template. It references a specific
// version and can be updated.
type Workspace struct {
	ID                uuid.UUID      `json:"id"`
	CreatedAt         time.Time      `json:"created_at"`
	UpdatedAt         time.Time      `json:"updated_at"`
	OwnerID           uuid.UUID      `json:"owner_id"`
	TemplateID        uuid.UUID      `json:"template_id"`
	TemplateName      string         `json:"template_name"`
	LatestBuild       WorkspaceBuild `json:"latest_build"`
	Outdated          bool           `json:"outdated"`
	Name              string         `json:"name"`
	AutostartSchedule string         `json:"autostart_schedule"`
	AutostopSchedule  string         `json:"autostop_schedule"`
}

// CreateWorkspaceBuildRequest provides options to update the latest workspace build.
type CreateWorkspaceBuildRequest struct {
	TemplateVersionID uuid.UUID                    `json:"template_version_id"`
	Transition        database.WorkspaceTransition `json:"transition" validate:"oneof=create start stop delete,required"`
	DryRun            bool                         `json:"dry_run"`
}

// Workspace returns a single workspace.
func (c *Client) Workspace(ctx context.Context, id uuid.UUID) (Workspace, error) {
	res, err := c.request(ctx, http.MethodGet, fmt.Sprintf("/api/v2/workspaces/%s", id), nil)
	if err != nil {
		return Workspace{}, err
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusOK {
		return Workspace{}, readBodyAsError(res)
	}
	var workspace Workspace
	return workspace, json.NewDecoder(res.Body).Decode(&workspace)
}

func (c *Client) WorkspaceBuilds(ctx context.Context, workspace uuid.UUID) ([]WorkspaceBuild, error) {
	res, err := c.request(ctx, http.MethodGet, fmt.Sprintf("/api/v2/workspaces/%s/builds", workspace), nil)
	if err != nil {
		return nil, err
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusOK {
		return nil, readBodyAsError(res)
	}
	var workspaceBuild []WorkspaceBuild
	return workspaceBuild, json.NewDecoder(res.Body).Decode(&workspaceBuild)
}

// CreateWorkspaceBuild queues a new build to occur for a workspace.
func (c *Client) CreateWorkspaceBuild(ctx context.Context, workspace uuid.UUID, request CreateWorkspaceBuildRequest) (WorkspaceBuild, error) {
	res, err := c.request(ctx, http.MethodPost, fmt.Sprintf("/api/v2/workspaces/%s/builds", workspace), request)
	if err != nil {
		return WorkspaceBuild{}, err
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusCreated {
		return WorkspaceBuild{}, readBodyAsError(res)
	}
	var workspaceBuild WorkspaceBuild
	return workspaceBuild, json.NewDecoder(res.Body).Decode(&workspaceBuild)
}

func (c *Client) WorkspaceBuildByName(ctx context.Context, workspace uuid.UUID, name string) (WorkspaceBuild, error) {
	res, err := c.request(ctx, http.MethodGet, fmt.Sprintf("/api/v2/workspaces/%s/builds/%s", workspace, name), nil)
	if err != nil {
		return WorkspaceBuild{}, err
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusOK {
		return WorkspaceBuild{}, readBodyAsError(res)
	}
	var workspaceBuild WorkspaceBuild
	return workspaceBuild, json.NewDecoder(res.Body).Decode(&workspaceBuild)
}

// UpdateWorkspaceAutostartRequest is a request to update a workspace's autostart schedule.
type UpdateWorkspaceAutostartRequest struct {
	Schedule string `json:"schedule"`
}

// UpdateWorkspaceAutostart sets the autostart schedule for workspace by id.
// If the provided schedule is empty, autostart is disabled for the workspace.
func (c *Client) UpdateWorkspaceAutostart(ctx context.Context, id uuid.UUID, req UpdateWorkspaceAutostartRequest) error {
	path := fmt.Sprintf("/api/v2/workspaces/%s/autostart", id.String())
	res, err := c.request(ctx, http.MethodPut, path, req)
	if err != nil {
		return xerrors.Errorf("update workspace autostart: %w", err)
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusOK {
		return readBodyAsError(res)
	}
	return nil
}

// UpdateWorkspaceAutostopRequest is a request to update a workspace's autostop schedule.
type UpdateWorkspaceAutostopRequest struct {
	Schedule string `json:"schedule"`
}

// UpdateWorkspaceAutostop sets the autostop schedule for workspace by id.
// If the provided schedule is empty, autostop is disabled for the workspace.
func (c *Client) UpdateWorkspaceAutostop(ctx context.Context, id uuid.UUID, req UpdateWorkspaceAutostopRequest) error {
	path := fmt.Sprintf("/api/v2/workspaces/%s/autostop", id.String())
	res, err := c.request(ctx, http.MethodPut, path, req)
	if err != nil {
		return xerrors.Errorf("update workspace autostop: %w", err)
	}
	defer res.Body.Close()
	if res.StatusCode != http.StatusOK {
		return readBodyAsError(res)
	}
	return nil
}