using Invercargill;
using Invercargill.DataStructures;
using Spry;
using Spry.Authentication;
using Statum;
using ClankerSaddle.Data;
using ClankerSaddle.Services;

namespace ClankerSaddle {

    /** A project row on the projects list, with task counts and a link to its page. */
    public class ProjectRowView : Object {
        public int64 id { get; set; }
        public string name { get; set; default = ""; }
        public string git_url { get; set; default = ""; }
        public string default_branch { get; set; default = ""; }
        public string summary { get; set; default = ""; }
        public int64 open_tasks { get; set; }
        public int64 done_tasks { get; set; }
    }

    /** Public data of the `projects` slot. */
    public class ProjectsPublic : Object {
        public Statum.Model.ActionDto create { get; set; }
    }

    /**
     * Entrypoint for /projects: lists every project with open/done task
     * counts and authors the create-project action (login required).
     */
    public class ProjectsEntrypoint : StatumEntrypoint {

        private ProjectService project_service = Inversion.inject<ProjectService>();
        private TaskService task_service = Inversion.inject<TaskService>();
        private UserService users = Inversion.inject<UserService>();

        public override async DirectiveBuilder handle() throws GLib.Error {
            var guard = yield SpryAuth.require_login(directives(), request, users);
            if (guard != null) {
                return (!)guard;
            }

            var rows = new Vector<ProjectRowView>();
            var tasks = yield task_service.list_tasks(null, null);
            foreach (var project in yield project_service.list_projects()) {
                var view = new ProjectRowView() {
                    id = project.id,
                    name = project.name,
                    git_url = project.git_url,
                    default_branch = project.default_branch,
                    summary = project.summary ?? ""
                };
                foreach (var task in tasks) {
                    if (task.project_id != project.id) {
                        continue;
                    }
                    if (task.status == STATUS_DONE || task.status == STATUS_FAILED) {
                        view.done_tasks++;
                    } else {
                        view.open_tasks++;
                    }
                }
                rows.add(view);
            }

            var pub = new ProjectsPublic();
            pub.create = action_registry.author<CreateProjectAction>();

            var props = (PropertyDictionary) GObjectMapping.to_properties(pub);
            props["projects"] = StateJson.list<ProjectRowView>(rows.to_immutable_buffer());

            var slot = state_service.new_slot(Scope.PAGE, new State() {
                type_name = "projects",
                public_data = props,
                private_data = new PropertyDictionary()
            });
            return directives().set(slot);
        }
    }

    /** A linked project on the project detail page, with a remove action. */
    public class ProjectLinkView : Object {
        public int64 link_id { get; set; }
        public int64 project_id { get; set; }
        public string name { get; set; default = ""; }
        public string git_url { get; set; default = ""; }
        public string relationship { get; set; default = ""; }
        public bool co_developed { get; set; }
        public Statum.Model.ActionDto? remove { get; set; }
    }

    /** A task row on the project detail page. */
    public class ProjectTaskRowView : Object {
        public int64 id { get; set; }
        public string title { get; set; default = ""; }
        public string status { get; set; default = ""; }
        public string display { get; set; default = ""; }
        public int64 priority { get; set; }
    }

    /** A rule attached to the project, with its detach action. */
    public class ProjectRuleRowView : Object {
        public int64 link_id { get; set; }
        public int64 rule_id { get; set; }
        public string name { get; set; default = ""; }
        public string body { get; set; default = ""; }
        public Statum.Model.ActionDto? detach { get; set; }
    }

    /** A rule option in the attach selects (project and task pages). */
    public class RuleOptionView : Object {
        public int64 id { get; set; }
        public string name { get; set; default = ""; }
    }

    /**
     * A project note on the project page: LLM-authored via `saddle
     * note`, with its date, source task link and a delete action (no
     * manual create — notes are user-curated, not user-written).
     */
    public class ProjectNoteRowView : Object {
        public int64 id { get; set; }
        public string project_name { get; set; default = ""; }
        public int64 source_task_id { get; set; }
        public string body { get; set; default = ""; }
        public string created_display { get; set; default = ""; }
        public Statum.Model.ActionDto? delete { get; set; }
    }

    /** Public data of the `project` slot. */
    public class ProjectDetailPublic : Object {
        public bool exists { get; set; }
        public int64 id { get; set; }
        public string name { get; set; default = ""; }
        public string git_url { get; set; default = ""; }
        public string default_branch { get; set; default = ""; }
        public string summary { get; set; default = ""; }
        public string created_display { get; set; default = ""; }
        public Statum.Model.ActionDto? update { get; set; }
        public Statum.Model.ActionDto? add_link { get; set; }
        public Statum.Model.ActionDto? attach_rule { get; set; }
    }

    /**
     * Entrypoint for /projects/{project_id}: the project's editable card,
     * its co-developed/reference links (with remove actions), its rules
     * (with detach actions and the attach form), the other projects
     * available for linking, and its task list.
     */
    public class ProjectDetailEntrypoint : StatumEntrypoint {

        private ProjectService project_service = Inversion.inject<ProjectService>();
        private TaskService task_service = Inversion.inject<TaskService>();
        private RuleService rule_service = Inversion.inject<RuleService>();
        private UserService users = Inversion.inject<UserService>();

        public override async DirectiveBuilder handle() throws GLib.Error {
            var guard = yield SpryAuth.require_login(directives(), request, users);
            if (guard != null) {
                return (!)guard;
            }

            int64 project_id = int64.parse(request.route("project_id") ?? "0");
            var project = yield project_service.get_project(project_id);
            if (project == null) {
                return directives().set_typed<ProjectDetailPublic>("project", Scope.PAGE,
                    new ProjectDetailPublic() { exists = false });
            }

            var sealed = new ProjectActionPrivate() { project_id = project_id };
            var pub = new ProjectDetailPublic() {
                exists = true,
                id = ((!)project).id,
                name = ((!)project).name,
                git_url = ((!)project).git_url,
                default_branch = ((!)project).default_branch,
                summary = ((!)project).summary ?? "",
                created_display = ((!)project).created_at != null
                    ? ((!)((!)project).created_at).format("%Y-%m-%d %H:%M") : "",
                update = action_registry.author_private<UpdateProjectAction, ProjectActionPrivate>(sealed),
                add_link = action_registry.author_private<AddProjectLinkAction, ProjectActionPrivate>(sealed),
                attach_rule = action_registry.author_private<AttachProjectRuleAction, ProjectActionPrivate>(sealed)
            };

            var links = new Vector<ProjectLinkView>();
            foreach (var link in yield project_service.list_links(project_id)) {
                var linked = yield project_service.get_project(link.linked_project_id);
                if (linked == null) {
                    continue;
                }
                var private_blob = new ProjectLinkActionPrivate() {
                    project_id = project_id,
                    link_id = link.id
                };
                links.add(new ProjectLinkView() {
                    link_id = link.id,
                    project_id = link.linked_project_id,
                    name = ((!)linked).name,
                    git_url = ((!)linked).git_url,
                    relationship = link.relationship,
                    co_developed = link.relationship == LINK_CO_DEVELOPED,
                    remove = action_registry.author_private<RemoveProjectLinkAction, ProjectLinkActionPrivate>(private_blob)
                });
            }

            var linkable = new Vector<ProjectRowView>();
            foreach (var other in yield project_service.list_projects()) {
                if (other.id != project_id) {
                    linkable.add(new ProjectRowView() {
                        id = other.id,
                        name = other.name,
                        git_url = other.git_url,
                        default_branch = other.default_branch,
                        summary = other.summary ?? ""
                    });
                }
            }

            var project_tasks = yield task_service.list_tasks(null, project_id);
            var task_display = yield task_service.display_map_for(project_tasks);
            var task_rows = new Vector<ProjectTaskRowView>();
            foreach (var task in project_tasks) {
                var display = task_display.get_or_default(task.id.to_string());
                task_rows.add(new ProjectTaskRowView() {
                    id = task.id,
                    title = task.title,
                    status = task.status,
                    display = display != null ? ((!)display).status : task.status,
                    priority = task.priority,
                });
            }

            var rule_rows = new Vector<ProjectRuleRowView>();
            foreach (var link in yield rule_service.list_project_attachments(project_id)) {
                var rule = yield rule_service.get_rule(link.rule_id);
                if (rule == null) {
                    continue;
                }
                var private_blob = new ProjectRuleActionPrivate() {
                    project_id = project_id,
                    link_id = link.id
                };
                rule_rows.add(new ProjectRuleRowView() {
                    link_id = link.id,
                    rule_id = link.rule_id,
                    name = ((!)rule).name,
                    body = ((!)rule).body,
                    detach = action_registry.author_private<DetachProjectRuleAction, ProjectRuleActionPrivate>(private_blob)
                });
            }

            var rule_options = new Vector<RuleOptionView>();
            foreach (var rule in yield rule_service.list_rules()) {
                rule_options.add(new RuleOptionView() {
                    id = rule.id,
                    name = rule.name
                });
            }

            var note_rows = new Vector<ProjectNoteRowView>();
            foreach (var note in yield project_service.list_notes(project_id)) {
                var note_private = new ProjectNoteActionPrivate() {
                    project_id = project_id,
                    note_id = note.id
                };
                note_rows.add(new ProjectNoteRowView() {
                    id = note.id,
                    project_name = ((!)project).name,
                    source_task_id = note.source_task_id,
                    body = note.body,
                    created_display = note.created_at != null
                        ? ((!)note.created_at).format("%Y-%m-%d %H:%M") : "",
                    delete = action_registry.author_private<DeleteProjectNoteAction, ProjectNoteActionPrivate>(note_private)
                });
            }

            var props = (PropertyDictionary) GObjectMapping.to_properties(pub);
            props["links"] = StateJson.list<ProjectLinkView>(links.to_immutable_buffer());
            props["linkable"] = StateJson.list<ProjectRowView>(linkable.to_immutable_buffer());
            props["tasks"] = StateJson.list<ProjectTaskRowView>(task_rows.to_immutable_buffer());
            props["rules"] = StateJson.list<ProjectRuleRowView>(rule_rows.to_immutable_buffer());
            props["rule_options"] = StateJson.list<RuleOptionView>(rule_options.to_immutable_buffer());
            props["notes"] = StateJson.list<ProjectNoteRowView>(note_rows.to_immutable_buffer());

            var slot = state_service.new_slot(Scope.PAGE, new State() {
                type_name = "project",
                public_data = props,
                private_data = new PropertyDictionary()
            });
            return directives().set(slot);
        }
    }
}