using ClawdDotNet.App;
using ClawdDotNet.App.Services;
using ClawdDotNet.Core.Config;
using ClawdDotNet.Web.Contracts;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;

namespace ClawdDotNet.Web.Endpoints;

/// <summary>
/// #683: The organisation — units, leads, moves, tool ceilings, unit-wide values. Every
/// decision is made by <see cref="OrgAdministration"/>; this only translates.
/// </summary>
internal static class OrganisationEndpoints
{
    public static void MapOrganisation(this RouteGroupBuilder api)
    {
        var org = api.MapGroup("/organisation");

        org.MapGet("/", (AppHost host) =>
        {
            var chart = host.Organisation.Current();
            var units = chart.Units
                .OrderBy(u => chart.PathOf(u.Id), StringComparer.OrdinalIgnoreCase)
                .Select(u => new UnitDto(
                    u.Id, u.Name, u.ParentId, u.LeaderAgentId, u.Goal, u.ToolCeiling,
                    chart.ToolCeiling(u.Id)?.Order(StringComparer.OrdinalIgnoreCase).ToList(),
                    new UnitDefaultsDto(u.Defaults.Model, u.Defaults.DailyCostUsd, u.Defaults.DailyTokens, u.Defaults.WhenExhausted),
                    chart.PathOf(u.Id), chart.Depth(u.Id),
                    u.Approvals is { } ap ? new UnitApprovalsDto(ap.Operations, ap.PerDay, ap.Hours) : null,
                    u.Inspection is { } ins ? new UnitInspectionDto(ins.Rate, ins.DenseRate, ins.NewDays, ins.PerDay) : null,
                    u.Votes is { } v ? new UnitVotesDto(v.Operations, v.Voters, v.ApproveAt, v.RejectAt, v.EffectiveQuorum, v.Hours, v.PerDay) : null))
                .ToList();

            var agents = host.Instance.Agents
                .OrderBy(a => a.AgentId, StringComparer.OrdinalIgnoreCase)
                .Select(a => new OrgMemberDto(
                    a.AgentId, a.DisplayName, chart.UnitOf(a.AgentId)?.Id, chart.LedBy(a.AgentId) is not null,
                    chart.EffectiveLeaderOf(a.AgentId)?.AgentId, a.UnitSinceUtc,
                    a.Tools.Keys.Order(StringComparer.OrdinalIgnoreCase).ToList(),
                    a.Budget.DailyCostUsd, a.Budget.DailyTokens, a.Model))
                .ToList();

            var workspaces = chart.Workspaces
                .OrderBy(w => w.Id, StringComparer.OrdinalIgnoreCase)
                .Select(w => new WorkspaceDto(
                    w.Id, w.Name, w.Purpose, w.OwnerUnitId,
                    ReferenceEquals(chart.UnitWorkspace(w.OwnerUnitId), w),
                    w.Members.Select(m => new WorkspaceMemberDto(m.UnitId, m.AgentId, m.Access.ToString(), m.IncludeSubUnits)).ToList(),
                    w.ProtectedPaths,
                    host.Organisation.FileCount(w.Id),
                    chart.Agents
                        .Select(a => (a.AgentId, Access: chart.AccessTo(a.AgentId, w.Id)))
                        .Where(x => x.Access > WorkspaceAccess.None)
                        .OrderBy(x => x.AgentId, StringComparer.OrdinalIgnoreCase)
                        .Select(x => new WorkspaceAccessDto(x.AgentId, x.Access.ToString()))
                        .ToList()))
                .ToList();

            return new OrganisationDto(units, agents, chart.Problems(), AgentAdministration.KnownTools, workspaces);
        });

        org.MapPost("/units", (AppHost host, UnitInputDto input) =>
            host.Organisation.CreateUnit(input.Id, input.Name, input.ParentId, input.Goal, input.Reason).ToResponse());

        org.MapPatch("/units/{unitId}", (AppHost host, string unitId, UnitUpdateDto input) =>
            host.Organisation.UpdateUnit(unitId, input.Name, input.Goal, input.Reason).ToResponse());

        org.MapDelete("/units/{unitId}", (AppHost host, string unitId, string? reason) =>
            host.Organisation.DeleteUnit(unitId, reason ?? "").ToResponse());

        org.MapPut("/units/{unitId}/leader", (AppHost host, string unitId, LeaderInputDto input) =>
            host.Organisation.SetLeader(unitId, input.AgentId, input.Reason).ToResponse());

        org.MapPost("/units/{unitId}/move", (AppHost host, string unitId, MoveInputDto input) =>
            input.Preview
                ? Results.Ok(ToDto(host.Organisation.PreviewMoveUnit(unitId, input.Target)))
                : host.Organisation.MoveUnit(unitId, input.Target, input.Reason, input.DropExcessTools).ToResponse());

        org.MapPost("/agents/{agentId}/move", (AppHost host, string agentId, MoveInputDto input) =>
            input.Preview
                ? Results.Ok(ToDto(host.Organisation.PreviewMoveAgent(agentId, input.Target)))
                : host.Organisation.MoveAgent(agentId, input.Target, input.Reason, input.DropExcessTools).ToResponse());

        // #698: A unit's doctrine — every version, and the human setting it.
        org.MapGet("/units/{unitId}/doctrine", async (AppHost host, string unitId, CancellationToken ct) =>
        {
            if (host.Doctrines is not { } store)
                return Results.Ok(Array.Empty<DoctrineDto>());
            return Results.Ok((await store.HistoryAsync(unitId, ct))
                .Select(d => new DoctrineDto(d.Version, d.Text, d.SetBy, d.SetAt, d.RunId, d.Reason)).ToList());
        });

        org.MapPut("/units/{unitId}/doctrine", async (AppHost host, string unitId, DoctrineInputDto input, CancellationToken ct) =>
        {
            if (host.Doctrines is not { } store)
                return Results.BadRequest(new OutcomeDto(false, "Doctrines are not available in this instance."));
            if (host.Organisation.Current().Unit(unitId) is not { } unit)
                return Results.BadRequest(new OutcomeDto(false, $"There is no unit '{unitId}'."));
            var text = (input.Text ?? "").Trim();
            if (text.Length > Core.Organisation.SqliteDoctrineStore.MaxLength)
                return Results.BadRequest(new OutcomeDto(false, $"A doctrine has at most {Core.Organisation.SqliteDoctrineStore.MaxLength} characters."));
            var set = await store.SetAsync(unit.Id, text, "human", null, input.Reason ?? "", ct);
            return Results.Ok(new OutcomeDto(true, set.IsEmpty ? $"Doctrine of '{unit.Name}' removed." : $"Doctrine of '{unit.Name}' set (version {set.Version})."));
        });

        // #702: What the unit puts to a blind vote, and the votes held.
        org.MapPut("/units/{unitId}/votes", (AppHost host, string unitId, VotesInputDto input) =>
            host.Organisation.SetVotes(unitId, input.Operations, input.Voters, input.ApproveAt, input.RejectAt, input.Quorum, input.Hours, input.PerDay, input.Reason).ToResponse());

        org.MapGet("/units/{unitId}/votes", async (AppHost host, string unitId, CancellationToken ct) =>
        {
            if (host.Engine?.Votes is not Core.Staging.Votes votes)
                return Results.Ok(Array.Empty<VoteDto>());
            var list = new List<VoteDto>();
            foreach (var vote in await votes.RecentAsync(unitId, 20, ct))
                list.Add(await VoteMapping.ToDtoAsync(vote, votes, ct));
            return Results.Ok(list);
        });

        // #693: The lead's spot checks — how often, what came of them, and the measures it proposed.
        org.MapPut("/units/{unitId}/inspection", (AppHost host, string unitId, InspectionInputDto input) =>
            host.Organisation.SetInspection(unitId, input.Enabled, input.Rate, input.DenseRate, input.NewDays, input.PerDay, input.Reason).ToResponse());

        org.MapGet("/units/{unitId}/spot-checks", async (AppHost host, string unitId, CancellationToken ct) =>
        {
            if (host.SpotChecks is not { } checks)
                return Results.Ok(new SpotCheckOverviewDto([], []));
            var list = await checks.ForUnitAsync(unitId, 30, ct);
            var measures = await checks.MeasuresForUnitAsync(unitId, 30, ct);
            return Results.Ok(new SpotCheckOverviewDto(
                list.Select(c => new SpotCheckDto(c.Id, c.Lead, c.AgentId, c.RunId, c.Why,
                    c.Findings.Select(f => new FindingDto(f.Kind.ToString(), f.Text)).ToList(),
                    c.CreatedAt, c.Verdict, c.Note, c.ReviewedAt)).ToList(),
                measures.Select(m => new MeasureDto(m.Id, m.CheckId, m.AgentId, m.ProposedBy,
                    Core.Inspection.SpotChecks.Label(m.Kind), m.Reasoning, m.ProposedAt, m.Status, m.DecidedBy, m.DecidedAt, m.Note)).ToList()));
        });

        org.MapPost("/measures/{measureId:long}/decide", async (AppHost host, long measureId, MeasureDecisionDto input, CancellationToken ct) =>
        {
            if (host.SpotChecks is not { } checks)
                return Results.BadRequest(new OutcomeDto(false, "Spot checks are not available in this instance."));
            var decided = await checks.DecideMeasureAsync(measureId, input.Accept, input.Note, "human", ct);
            return decided.Ok ? Results.Ok(new OutcomeDto(true, decided.Message)) : Results.BadRequest(new OutcomeDto(false, decided.Message));
        });

        // #687: What the lead may approve instead of the human.
        org.MapPut("/units/{unitId}/approvals", (AppHost host, string unitId, ApprovalsInputDto input) =>
            host.Organisation.SetApprovals(unitId, input.Operations, input.PerDay, input.Hours, input.Reason).ToResponse());

        org.MapPut("/units/{unitId}/ceiling", (AppHost host, string unitId, CeilingInputDto input) =>
            input.Preview
                ? Results.Ok(ToDto(host.Organisation.PreviewToolCeiling(unitId, input.Tools)))
                : host.Organisation.SetToolCeiling(unitId, input.Tools, input.Reason, input.DropExcessTools).ToResponse());

        org.MapPost("/units/{unitId}/settings/preview", (AppHost host, string unitId, SettingPreviewInputDto input) =>
        {
            if (!Enum.TryParse<UnitSetting>(input.Setting, ignoreCase: true, out var setting)
                || !Enum.TryParse<UnitSettingMode>(input.Mode, ignoreCase: true, out var mode))
                return Results.BadRequest(new OutcomeDto(false, "Unknown setting or mode."));

            return Results.Ok(host.Organisation.PreviewSetting(unitId, setting, input.Value, mode)
                .Select(c => new SettingChangeDto(c.AgentId, c.DisplayName, c.Current, c.Proposed, c.Outlier, c.SelectedByDefault))
                .ToList());
        });

        MapWorkspaces(org);

        org.MapPost("/units/{unitId}/settings", (AppHost host, string unitId, SettingApplyDto input) =>
            Enum.TryParse<UnitSetting>(input.Setting, ignoreCase: true, out var setting)
                ? host.Organisation.ApplySetting(unitId, setting, input.Values, input.Reason, input.DefaultValue).ToResponse()
                : Results.BadRequest(new OutcomeDto(false, "Unknown setting.")));
    }

    // ─── workspaces (#684) ───

    private static void MapWorkspaces(RouteGroupBuilder org)
    {
        org.MapPost("/workspaces", (AppHost host, WorkspaceInputDto input) =>
            ToMembers(input.Members ?? []) is not { } members
                ? Results.BadRequest(new OutcomeDto(false, "Unknown access level — Read, Write or Manage."))
                : host.Organisation.CreateWorkspace(input.Id, input.Name, input.Purpose, input.OwnerUnitId, members, input.Reason).ToResponse());

        org.MapPatch("/workspaces/{workspaceId}", (AppHost host, string workspaceId, WorkspaceUpdateDto input) =>
            host.Organisation.UpdateWorkspace(workspaceId, input.Name, input.Purpose, input.ProtectedPaths, input.Reason).ToResponse());

        org.MapPut("/workspaces/{workspaceId}/members", (AppHost host, string workspaceId, WorkspaceMembersInputDto input) =>
            ToMembers(input.Members ?? []) is not { } members
                ? Results.BadRequest(new OutcomeDto(false, "Unknown access level — Read, Write or Manage."))
                : host.Organisation.SetWorkspaceMembers(workspaceId, members, input.Reason).ToResponse());

        org.MapDelete("/workspaces/{workspaceId}", (AppHost host, string workspaceId, string? reason) =>
            host.Organisation.DeleteWorkspace(workspaceId, reason ?? "").ToResponse());

        org.MapPost("/units/{unitId}/workspace", (AppHost host, string unitId, ReasonInputDto? input) =>
            host.Organisation.CreateUnitWorkspace(unitId, input?.Reason ?? "").ToResponse());
    }

    /// <summary><c>null</c> when a level is not one of Read, Write, Manage.</summary>
    private static List<WorkspaceMemberInput>? ToMembers(IReadOnlyList<WorkspaceMemberDto> members)
    {
        var result = new List<WorkspaceMemberInput>();
        foreach (var member in members)
        {
            if (!Enum.TryParse<WorkspaceAccess>(member.Access, ignoreCase: true, out var access) || !Enum.IsDefined(access))
                return null;
            result.Add(new WorkspaceMemberInput(member.UnitId, member.AgentId, access, member.IncludeSubUnits));
        }
        return result;
    }

    private static StructurePreviewDto ToDto(StructurePreview preview)
        => new(preview.AffectedAgents, preview.ToolsLost, preview.Running, preview.Problems, preview.CanApply);
}